• Journal of the Korean Chemical Society
• /
• v.48 no.2
• /
• pp.156-160
• /
• 2004

The extraction rates of plasticizer of LPG high pressure rubber are studied. Submerging solvents are composed of propane, n-butane, n-pentane, n-hexane, n-heptane, propylene, 1,3-butadiene, 1-pentene, 1-hexene, ethanethiol, t-butanethiol, dimethyl sulfide, methyl ethyl sulfide. The relationship between the extraction rate of plasticizer and the descriptors of submerging solvent by using multiple linear regression is as follows; PE(wt%) = 7.5193 - 0.58500Carbon${\sharp}$ + 2.3294DB + 2364SH, (N = 13, F = 24.135, R$^2$ = 0.8894, R$_{adj}^2$ = 0.8526, Variance = 7.588) Plasticizer is well extracted by LPG composed of the high vapour pressure and polarity compounds. The mass of extracted plasticizer becomes increasing in proportion to the contents of thiol sulfur compound and unsaturated hydrocarbon such as propylene and 1,3-butadiene in LPG. While the heavier hydrocarbons are, the less the quantities of plasticizer extracted from rubber are.

• Ecology and Resilient Infrastructure
• /
• v.4 no.4
• /
• pp.237-244
• /
• 2017

The Impact Mitigation Regulation was first introduced in Germany with an intention to avoid or reduce the natural ecology and landscape infringement as much as possible according to the development project. The system has is an advantage of being able to efficiently operate the linkage policy of land planning and environment planning to prevent the excessive development of the national land and to continue to manage it. This study applied the German natural impact mitigation system by revising and supplementing it according to the domestic situation with a biotope map of Juam-dong, Gwacheon City, as a case study area. Spatial analysis was conducted of biotope maps, landscape maps, and NDVI maps to suggest a plan to derive and preserve the areas excellent in an ecological and environmental value. It was confirmed the Impact Mitigation Regulation could be used as a policy link of the land-environment policy that minimizes the degree of the damage that cannot help occurring necessarily in the development of the national land and to manage that damage from the planning stage.

• Science of Emotion and Sensibility
• /
• v.6 no.3
• /
• pp.45-54
• /
• 2003

This study is designed to extract sensibility words of mobile phone image and analyze the relational patterns among those words to develope a sensibility model for mobile phone design. We expected the different sensibility scale would be developed according to the case of open or closed. The 25 representative words were abstracted as a result of words collection. As a result of the factor analysis of sensibility evaluation for mobile phone, the mobile phone design image was different according to the state of folding and unfolding. In the state of folder unfolding, the first factor was named as 'cool', the second factor as 'soft' and the third factor as 'handy'. In the state of folding, the first factor was named as 'stylish', the second factor as 'variegated' and the third factor as 'hard'.

• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.36 no.6
• /
• pp.1069-1073
• /
• 2016

The current free-riding subway system for the elderly over 65 years old has been implemented since in 1980. As the aging population increases, the number of free riders also increases. It results eventually in the increase of subsidy from government. In addition, a transfer between subway and bus is not good enough since the free ride system is applied to only subway not to bus. The aim of this study is to analyze the transport card data to understand the impact of free-riding in the viewpoint of economic issues. It aims also to analyze the transfer patterns between public transport. At the end it compares Korea case with international cases and finds out some issues on free-ride systems. Finally, counter-measures aimed at improving the current free-rider system is suggested.

• Journal of Navigation and Port Research
• /
• v.33 no.10
• /
• pp.743-756
• /
• 2009

This paper tries to analyze how the governance institutions of the Port Authority of New York and New Jersey overcome agent problems in public agencies based on the Principal-Agent Theory, and find the implications that will be helpful to the governance of port authorities in Korea. The Port Authority's governance is characterized by decentralization of personnel rights, open meetings policy, freedom of information policy, public hearings, and fiscally self-supporting system. Those characteristics are helpful in overcoming the agent problems of public agency, such as adverse selection, moral hazard, and complicated external structure, through reinforcing of monitoring agent by principal, easing of information asymmetry between principal and agent, and clarification of organizational ownership structure. Those characteristics may give many implications for the design of governance structures of port authorities in Korea.

• Environmental and Resource Economics Review
• /
• v.17 no.2
• /
• pp.419-455
• /
• 2008

This paper analyses the Night Thermal-storage Power Service(NTPS) from the perspective of sustainability. It investigates the economic, environmental and social aspects of NTPS, thereby reveals that NTPS triggers the inefficient use of fuel, the increase of carbon dioxide emission and the increase of cross subsidy between consumers. This paper also analyses NTPS from the perspective of energy security. It investigates how NTPS makes LNG demand volatile in winter, thus threatens our energy security. According to the analysis, NTPS directly violates two basic principles of national energy policy; Sustainability and Energy Security. To solve these problems, not only the harmonized adjustment of Heating Oil Tax and Electric Power Rates is needed to curb the rapier increase of NTPS, but also another separate policy is necessary for converting the electric heating system based on NTPS into the one based on Heating Oil.

• Journal of the Korea Convergence Society
• /
• v.6 no.5
• /
• pp.55-61
• /
• 2015

This study is related with globalization development plans of the convergence systems and policies for domestic fire industry. The current issues are analysed from the condition of the policy enforcement of fire industry promotion and analysis results of the fire industry's environment. Consequently, advanced plans of promotion law and overseas expansion plans for fire industry is proposed, Especially, overseas expansion plans include technology policy strategies and activate plans of overseas expansion support for fire industry. Plans of overseas expansion support for fire industry are discussed in terms of three detailed plans including with diversification of foreign exhibitions support of fire industry, dispatch expansion of overseas market pioneer and expansion of the asian emerging markets. Especially, plans of expansion of the asian emerging markets will lead the strategic performances including with establishment of superiority in domestic fire system, provision of infrastructure abroad in domestic fire industry and of Induction of establishment in domestic fire inspection systems.

• The Journal of the Korea Contents Association
• /
• v.19 no.11
• /
• pp.92-101
• /
• 2019

This study used the Q-method to derive the structure of subjective opinions and perceptions of university students about the behavior of food delivery agency service provided by staff not directly employed in restaurants. For this purpose, the Q factor analysis was performed using the PC QUANL program for the Q-sort, which consists of a statement card, a P-sample, and a classification process. The results were classified into three types. The factor names were set as the first type (N = 7): efficiency seeking type, the second type (N = 19): benefit seeking type, and the third type [(N = 6): cost-effectiveness seeking type. The characteristics of each type are Type 1:Types that recognize aspects that are efficient for both consumers and restaurants, Type 2: Types of recognizing aspects of being benefited from speed, convenience and benefit, Type 3: Although it contributes to labor cost savings, it appears to recognize price and quality aspects in the initial market, which is burdened by consumers. The purpose of this study is to derive the problems of food delivery agency service business according to the three types and to provide strategic implications for the development direction and improvement plan.

• Fire Science and Engineering
• /
• v.22 no.5
• /
• pp.112-124
• /
• 2008

The extra session of the 17th National Assembly convened lastly had passed the law on the promotion of the fire industry. Therefore, the development of the fire industry discussed insignificantly in accordance with the establishment of the law. In this important time, this study was intended to derive tasks for development through researching the concept and developing process of the fire industry and forecasting the industry. For defining the concept of the fire industry, this study researched meaning, the present status and features of the industry. For study of developing process of the fire industry, this study analysed fire law and system, fire codes, fire products and development of fire market. The analyses were processed as a unit of every 10 years from 1960's. Consequently, this study presented some tasks for development of the fire industry such as fire inspection system, fire products circulation system, separated ordering system, managing system of fire facilities and technical R & D of the fire industry based on analysing and forecasting the fire industry.

• Environmental and Resource Economics Review
• /
• v.19 no.4
• /
• pp.915-961
• /
• 2010

This study is concerned with health damages from $SO_2$ under different assumptions on the relationship between air concentrations and their marginal health impacts. $SO_2$ concentration profiles resulting under emission caps, and a system of tradable emission allowances are compared. Using slopes and curvatures of the health response function consistent with evidence in medical literature, emission caps are shown to lead to lower aggregate damages under all considered parameters, an advantage of $26~452 million. The benefit of emission caps over tradable allowances increases with the curvature of the response function, but falls with its slope. The advantage of emission caps in terms of environmental damages is never overturned completely for the considered functional forms. The marginal damage function would have to be steeper than what the current medical evidence suggests for price instruments to outperform emission caps in terms of aggregate damages. With other welfare consequences included-emission abatement costs, consumer and producer surpluses, and government revenue-emission caps always lead to a $3.7~4.1 billion greater measure of social welfare.