• Journal of Korean Institute of Industrial Engineers
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• v.24 no.1
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• pp.115-126
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• 1998

A GDHS(Geothermal District Heating System) is a heating system supplying a group of districts with heat extracted from geothermal sources. Due to various advantages of GDHS including the saving of fuel consumption as well as the reduction of air pollution, a world-wide trend is to replace central/individual heating systems with GDH systems. The basic point of this paper is that a crash program mentality leads to inappropriate decisions about policy issues in large-scale research and development like the development of GDHS, R&D funding should be viewed as a sequential decision, not a once-and-for-all choice. Hence we develop on economic feasibility assessment model based on a continuous sequential decision process for the Chejoo Island GDHS Project by modifying Roberts's model.

• New & Renewable Energy
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• v.1 no.1 s.1
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• pp.79-86
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• 2005

This study conducted an analysis of economic feasibility with unit generating costs calculated based on scenarios of capacity factors, discount rates, government supporting rates, installation costs. However, It Is clear that few new and renewable energies can meet the tariffs [government purchasing prices] set by the government in light of the current market reality. Without the government support, solar PV is not economically feasible at the tariff of \716.40/kWh. in the case of wind Power, the current tariff of \107.66/kWh is not enough to make it competitive except for a mid- and large-scale wind farm The analysis showed that even small hydro is not economically acceptable at the current tariff of \73.69/kWh.

• Economic and Environmental Geology
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• v.5 no.3
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• pp.151-160
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• 1972

The region is composed of Cretaceous volcanic and sedimentary rocks; andesites and granites, It is clarified by the writers that most formations ever known as andesites are not igneous origin but hornfelsic sedimentary rocks. Refering to this fact, broad areas in the south-eastern part of the Kyeong-Sang Namdo which are colored as andesites in the geologic maps scale 1/50,000, published by Geological Survey of Korea should be rechecked. In this area, four granite plutons are isolated by the hornfelsic sedimentary formation, andesites and alluvium. Each plutons are zoned by the lithological facies.

• Proceedings of the Korea Technology Innovation Society Conference
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• 2003.05a
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• pp.313-335
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• 2003

It has been thirty years since Daedeuk Science Park was established in Daejeon, Korea. The Park has grown to be a national center for scientific activities, hosting more thirty research institutes at major scale with 12,000 scientists. As a main purpose of establishing the science park was to promote sciences as basic research, there have not been much economic impacts created from the science park. There have also been very little networks established among research and educational institutes within the science park and the city of Daejeon in general. After the economic crisis in 1997, however, there have been increasing changes around the Park. Since then more than 400 technology-intensive firms were newly created, mainly from the research institutes, or introduced to the Park area. This paper analyzes R&D networks of these small firms, especially with research institutes and universities, based on a questionnaire survey. The paper has argued: 1) to establish technology transfer centers, 2) to emphasize research related to commercialization, 3) to intensify advertizement of research outputs to the potential entrepreneurs, 4) to assist entrepreneural associations of concerned companies.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.64 no.7
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• pp.1088-1095
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• 2015

In most cases, the use of electric power is associated with the economic scale of a nation closely. Thus, the electric power load forecasting plays an important role for the national economic plan. This paper deals with the design method for the electric power load forecasting system. In this paper, RCR-MA data processing, which can make the complex properties of the original data form simple, is proposed. Next, IT2TSK FLS, which can reflect the uncertainty of data more than T1TSK FLS, is applied. Consequently, the structural advantage of the proposed system can improve the forecasting accuracy, and is verified by using two types of electric power data.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2012.05a
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• pp.157-159
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• 2012

In recent years, the number of high-rise buildings has been on the rise. As buildings have become larger in scale, significantly different issues related to their construction and maintenance have emerged. In addition, the automation and mechanization of the cleaning work for the curtain wall, one of the most frequently-performed tasks in building maintenance, is required as a fundamental measure. For this reason, a guide-rail type cleaning robot system is emerging as one of the measures in response to external factors, including gust. The major objective of this study is to propose an economic feasibility forecasting model and to apply the a building facade cleaning robot which is now under development.

• Economic and Environmental Geology
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• v.19 no.3
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• pp.219-224
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• 1986

Spectral induced polarization (IP) responses for 20-degree dipping body are obtained by both numerical and scale models. The IP responses for the dipping body vary not only with current frequencies but also with resistivity ratios between the body and the surrounding medium. If the ion concentration related to polarizable reaction is constant, the resistivity of polarizable body depends only on the current frequency. This implies that the IP responses to the resistivity ratio are qualitatively equivalent to those to the current frequency. The numerical results with wide-range resistivity ratios, therefore, can be used as standard curves for the interpretation of spectral IP data.

• Economic and Environmental Geology
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• v.18 no.3
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• pp.289-299
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• 1985

Sedimentary petrology and depositional environments of the Sindong Group, consisting of in ascending order the Nagdong, Hasandong and Jinju Formations, in the Euiseong Subbasin are studied. For these, the Sindong sequence over 1,000m thick is measured at the scale of 1:200 and 36 thin sections of sandstones of the Hasandong Formation are studied under the polarizing microscope. In addition, published paleontologic data are incorporated in the sedimentologic interpretation. Most of the sandstones are classified as arkose. They are moderately sorted, near symmetrical to fine skewed and mesokurtic. Relationship between the textural parameters suggests a fluviatile environment of the Hasandong Formation. The Sindong fauna and flora also indicate non-marine depositional environments. Sedimentologic data of the measured sections show that the Sindong Group is made up of from the bottom an alluvial fan (lower part of the Nagdong Formation), a fluvial plain (upper part of the Nagdong Formation and the Hasandong Formation) and a fluvial/lacustrine (the Jinju Formation) deposits.

• Korean Journal of Health Education and Promotion
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• v.32 no.5
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• pp.53-62
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• 2015

Objectives: The purpose of this study was to examine the associations among self-rated health and socioeconomic status. Methods: Analyses were conducted based on cross-sectional data obtained from the Korea Youth Risk Behavior Web-based Survey. A total of 79,202 students aged 12 to 18 years participated in the study and there was a response rate of 95.5%. Separate logistic regression analyses were performed on each gender group based on a set of independent variables. Those being: the level of parental education level; family affluence scale; subjective household economic status; and subjective school achievement with SRH as the dependent variable. Results: Multivariate analyses revealed significant associations between each SES and adolescent SRH after controlling for other covariates. However, in the models that included all SES indicators, subjective household economic status and subjective school achievement remained significant in boys and girls. Conclusions: The findings demonstrated that subjective SES indicators are more closely related to adolescent SRH when compared with objective indicators.

• Journal of the Korean Institute of Landscape Architecture
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• v.24 no.2
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• pp.52-61
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• 1996

Almost every national parks in the world have problems in their own way. The centennial history of national park itself was that of problem solving. Various attempts and testing have done. A successful example of national park is, however, hardly find out till today except for several western countries. Internationally, the socio-economic approach has become a main stream. However, this approach has resulted into a natural degradation of large-scale as well as in the Third world countries and Korea. The other stream in this area has cultural aspects. The way which decreasing socio-economic conflicts and pursuing solutions by the cultural approach to the problems gives good consequences in the national parks of western europe. The different settings like Korea which have amounts of cultural differences, in contrast with U.S.A. the birthplace of national parks, this way should suggest new possibilities too.