• Korean Journal of Construction Engineering and Management
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• v.12 no.3
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• pp.91-100
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• 2011

Green technologies of buildings are spreading for saving resource and energy consumption during life cycle of buildings. However, selection of optimized the technologies for applying projects is needed a lot of time and costs. Therefore prioritization is necessary to apply the technologies for buildings. An evaluation of economic value for the technologies is significant for prioritization of the technologies, however, the current evaluation system of economic value for technologies is not reflected the accurate features of the technologies. Green technologies have the objectives for reducing the emission of CO2 and saving the cost during the whole lifecycle of buildings. Thus the evaluation of economic feasibility for green technologies is needed to include the economic value from improving the environment. This paper developed the economic evaluation method integrated with LCC and LCA to accurately analyze the economic value for green technologies. Moreover, this paper drew the priority of the technologies by conducting case studies with the integrated method and analyzing the results with AHP. The conclusion of case studies, Green technologies is worth more if to include the economic value from improving the environment. Then in analysis of priority, Green intelligent component technologies were rated the highest. The conclusion of the study is able to utilize the supporting tool for making decision to select the optimized technologies for the projects and precedence study for developing future research of prioritization for green technologies. The future study for improving the developed method will supplement the various evaluation factors and apply the detailed weight to analyze the priority of green technologies.

• The KIPS Transactions:PartB
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• v.19B no.2
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• pp.99-106
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• 2012

The purpose of this study was to determine the evaluation parameters' osteoporosis predictability in accordance with measuring regions by analyzing the correlations between bone mineral density and trabecular patterns derived from different measuring regions. Experimental subjects were a total of 40 female patients after menopause aged over 40 years, and were classified into 20 control and 20 osteoporotic groups according to the T-score. Bone mineral density was measured on femoral neck, trochanter and ward's triangle by DEXA(Dual Energy X-ray Absorptiometry). We designated ROI(Region of Interest) with $50{\times}50$ pixel size on each measuring regions, and extracted trabecular patterns by using existing image processing method. We also selected a total of eight evaluation parameters that are categorized into structural(mean gray level, area, perimeter, thickness and terminal distance), skeletonized parameters(number, length) and fractal dimension. As a result, it was observed that area, perimeter, thickness, terminal distance, number, length and fractal dimension reflected the bone mineral density with high statistical validity(p<0.003). We also confirmed that the evaluation parameters could predict the osteoporosis more efficiently.

• Journal of the Korean Society of Radiology
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• v.14 no.4
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• pp.487-494
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• 2020

The distance between the source and the detector, the diameter of the detector, and the volume effect of the radiation source result in a change in solid angle at the detector entrance, which affects the determination of detection efficiency by causing a difference in path length within the detector. A typical analysis method for calculating solid angles was useful only for a source (⁶⁰Co) with a simple geometric structure, so in this experiment, the distance between the detector and the source was measured by switching on for up to 25 cm with the reference point of window cap 0.5 cm. In addition, 450 and 1000 ㎖ Marinelli beaker of standard volumetric sources were closely adhered to the detector. For circular point sources co-axial with the detector, the change in the solid angle to the distance from the detector window is equal to half the square radius of the source versus the square radius of the detector, if the resulting relationship of the calculation analysis results in the detector being less than the radius of the source. Since the solid angular difference is 0.5 the result of Monte Carlo is acceptable. The relationship between detector and source distance is shown. Solid angles have been verified to decrease rapidly with distance. Measurement and simulation results for a volumetric source show a difference of ±1.01% from a distance of 0 cm and less than 4 % when the distance is reduced to 5 and 10 cm. It can be seen that the longer distance, the smaller efficiency angle, and the exponential increase in attenuation as the energy decreases, is reflected in the calculation of efficiency. Thus, the detection efficiency has proved sufficient for the use of solid angle and Monte Carlo codes.

• Land and Housing Review
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• v.3 no.4
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• pp.423-431
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• 2012

The trends of Green growth and environmentally-friendliness came to be the key development indicator for sustaining global environment for the future. Korean government reflected these trends in the main flows of the national development index. Korean construction industry is concentrating investment on fields related to these trends such as technologies for carbon dioxide deduction, materials or products for environmentally-friendly building and alternative energy development, as well. However, efforts to follow these trends during the construction process as a step for production phrase are not being considered enough. In this study, we analysed current status and points to be improved of on-site environment management by surveying major project owners and representatives of the environmental affairs in the leading companies of those fields. Also, we suggested organizational structure and operation model as a solution for enhancing environmentally-friendliness for systematic approach to manage on-site environment in public construction sites. In addition to these solutions, further approaches such as shifting paradigm of project owners and contractors, securing workforce and practical budget for efficient management activities, developing environmental management manuals, setting standards for evaluation of activities are needed for the stable settlement of on-site environmental management.

• Journal of Korean Society of Coastal and Ocean Engineers
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• v.32 no.5
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• pp.340-350
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• 2020

A rapid refresh wave forecasting system has been developed using the sea wind on the Korea Local Analysis and Prediction System. We carried out a numerical experiment for wind-wave interaction as an important parameter in determining the forecasting performance. The simulation results based on the seasons of with typhoon and without typhoon has been compared with the observation of the ocean data buoy to verify the forecasting performance. In case of without typhoon, there was an underestimate of overall forecasting tendency, and it confirmed that an increase in the wind-wave interaction parameter leads to a decrease in the underestimate tendency and root mean square error (RMSE). As a result of typhoon season by applying the experiment condition with minimum RMSE on without typhoon, the forecasting error has increased in comparison with the result without typhoon season. It means that the wave model has considered the influence of the wind forcing on a relatively weak period on without typhoon, therefore, it might be that the wave model has not sufficiently reflected the nonlinear effect and the wave energy dissipation due to the strong wind forcing.

• Korean Journal of Food Science and Technology
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• v.40 no.1
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• pp.96-100
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• 2008

Pungent oils are fat sources that determine the taste, flavor, and satiety of foods. They are also energy sources and regulators of lipid metabolism in humans. The present study was performed to evaluate the effects of red pepper (Capsicum annuum L.) seed oil (RPO) and sancho (Zanthoxylum schinifolium) seed oil (SCO) as pungent oils on the lipid profiles of rats fed on hypercholesterolemic diets (0.12% cholesterol), as compared to common soybean oil (SBO). There were large differences in the n-6/n-3 fatty acid ratios of the experimental oils (SBO: 8.8, SCO: 1.2, RPO: 70.1). Serum cholesterol concentrations were higher in the RPO groups than in the other groups; whereas ratios of HDL-cholesterol/total cholesterol were lower in the RPO groups. On the other hand, liver cholesterol levels were markedly higher in the SCO groups than in the RPO groups, with the SBO groups having intermediate levels; these largely reflected cholesterol ester content differences in the rat livers. It is possible that the different serum cholesterol responses observed in the RPO and SCO groups might have been related to differences in the n-6/n-3 fatty acid ratio rather than the polyunsaturated fatty acids/saturated fatty acids ratio. Serum triacylglycerol concentrations were lower in the SCO groups as compared to the other groups. Overall, the results showed a hypocholesterolemic effect for sancho seed oil as compared to red pepper seed oil in rats fed diets containing 0.12% cholesterol.

• Journal of the Korean Chemical Society
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• v.55 no.4
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• pp.703-714
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• 2011

The purpose of this study was to investigate the effect of STS modules reflecting Ansan's geological characteristics in Chemistry I on high school students' science related attitudes and preference for STS lessons. The subjects were 10th grade students from K High School in Ansan and comprised 71 students in the experiment group and 78 students in the control group from 2 classes each. Pretest-posttest control group design was employed for the purpose of research. Four STS modules with lesson plans and teaching materials with themes of water, air, and energy, all of which are closely related to high school Chemistry I were developed and applied to the experiment group. The science related attitudes and preference for STS lessons were then examined in pre- and post-tests. The science related attitudes of the experiment group were significantly high in three out of five domains compared to the control group who was taught traditionally. The preference for STS lessons of the experiment group were highly positive in all five areas and were particularly high in the area of 'relation to society'. Such results imply that in order to make effective high school Chemistry I curriculum units related to STS, emphasized by both the 7th National Curriculum and the Revised 7th National Curriculum, it is necessary to use episodes reflecting local characteristics in which students show greater interest and active participation.

• Journal of The Geomorphological Association of Korea
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• v.20 no.3
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• pp.41-53
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• 2013

This research was carried out to classify erosion shapes and sea-cliff erosion rates were estimated through periodic field survey in Dundu-ri, Anmyeondo. Based on the results of field measurements using the datum-point, the annual sea-cliff erosion rate was estimated about 25~102cm/yr by point. The erosion rate gradually increases from spring to summer, but tends to decrease slightly in autumn. Specifically, the erosion rate between June and July indicated a rather decreasing trend, but showed a sharp increase between July and September. This was attributed to erosion that proceeds more rapidly than during other periods due to severe rainstorms in summer that had a direct impact on the study area as well as storm surges caused by hurricanes. Afterwards, the sea-cliff erosion rate gradually decreased in autumn, but reflected an increasing trend again from December to January. This was attributed to the mechanical weathering that actively progresses as bed rocks on the sea-cliff undergo repeated freezing and thawing in winter. The seacliff in Dundu-ri is divided into three types according to the erosion shape. First, Type A is observed in the sea-cliff composed of the same bed rocks and hard rock stratum. Second, Type B is found in the sea-cliff with a relatively gentler slope compared to Type A, since weathering material including soil is formed on the surface of the sea-cliff consisting of the same bed rocks and hard rock stratum. Lastly, Type C is observed in the sea-cliff where hard rock stratum is mixed with soft rock stratum. In this case, the soft rock stratum slumps and erodes first by precipitation and wave energy, followed by additional slumping of the exposed hard rock stratum.

• Sijohaknonchong
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• v.24
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• pp.87-111
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• 2006

The purpose of this study was to delve into displaced people's consciousness of hometown by examining the Sijo Wu Suk-ja who was born in Gaeseong. North Korea. Specifically, it's attempted to look into displaced people's longing for hometown, their desire for the unification of South and North Koreas and their will to that. Few poets had ever coherently sticked to the themes of the pain arising from losing one's hometown and the division of the nation and of yearning for national unification. The division of the nation is a unique problem that only Korea is faced with in the world, and looking into how this issue is reflected in Sijo written by a displaced person is like shedding light on the problems with the nation. The matter of national unification is one of the absolute, unavoidable tasks in which every Korean people should be involved. and all of us should think of how it could be attained. Under the circumstances, the effort by this study to examine Sijos written by a displaced person to find out displaced people's longing for their hometown during the long period of time more than half a century, their pain resulting from separating from their families. and their long-cherished desire for the unification of the nation would serve as a chance to wake up to what problems we are confronted with and to let us direct more energy into national unification. When her nine collections of Sijo were investigated. it's found that her consciousness of hometown could be characterized by three things. The first Is the pain about losing hometown and yearning for that, and another is the pain caused by dispersed families and longing for them, and the third Is a desire for the unification of the nation and a will to that.

• Journal of the Korea Convergence Society
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• v.10 no.3
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• pp.203-209
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• 2019

Special Act on Regulatory Freedom Zone and Regional Special Development Zonet" introduced a new type of 'Freedom Special Zone of Regulation' that is legally distinguished from the existing Special Districts for Regional and Regional Development to support the innovative and strategic growth of the areas, and even passed a number of legal grounds for providing innovative regulations for regional development projects or regional strategic industries within the Special Districts. Starting with the bill legislation proposed by The Parliament Members, Kim Kyung-soo on behalf of 33 suggestors, Choo Kyung-ho, Jung Sung-ho and Hong Il-pyo submitted the bill legislation on behalf of 10 to 12 proposers, respectively. As a major matter of issue, the purpose, designation, scope of application, promotion system, application of A Bill of Three kind on Regulatory Innovation, and Balanced National Development, many kind of regulation as like types of menu, special cases, punitive regulations, and so on have been argued until the end of the bill proposed from the beginning. In this study, the differences between the bill suggested by the Parliament members and bill approved already are to be compared and analyzed to confirm how the items on issue were reflected for the bill finally and to draw up measures for the correct operation of the special regulations.