• KSCE Journal of Civil and Environmental Engineering Research
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• 제26권3A호
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• pp.513-521
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• 2006

Many studies have been conducted on the high tension bolt friction connection in the view of the field practice. Those effort, however, unfortunately have not been appropriately applied in the design specifications. Recently, particularly for steel bridges, rationalization of design takes greater attention from designers and hence, demand on rationalization of high tension connection becomes more significant. The purpose of this study is to suggest direction for the rationalization of high tension bolt connection and to also provide fundamental information for the improvement of the design specifications. In order to accomplish the purposes, the design specifications in Korea was analyzed and compared with other specification from abroad, and was studied one of the most important factors including slip coefficient, and the specifications on the size of bolt holes. The effect of over-sized bolt hole and the reduction of axial force on bolt was evaluated through the experimental studies on the slippage of the high tension bolt connections. Other research topics included herein includes the difference of slip coefficients, the effect of over-sized bolt holes and the gap distance of members, and the application of filler plate and corrosion protected bolts. From the research results, it is known that the specifications in Korea apply a constant slip coefficient with respect to the contacted surface conditions while various coefficients are available depending on the contacted surface conditions. Therefore, it is recommended that the specifications in Korea also develop and detail the slip coefficient which can appropriately take account of the variation of the contacted surface conditions. It is also suggested that the limitation abroad on the over-sized bolt hole may be applied for enhancing the effectiveness of construction.

• Journal of Korean Society of Industrial and Systems Engineering
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• 제20권42호
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• pp.121-130
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• 1997

The purpose of this study was to find altermatives on restructuring of distribution system and rationalization of management in tourism industry. A theoretical approach was used to determine how principle concepts and strategies in marketing can be applied into tourism industries.

• Journal of Korea Foundry Society
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• 제31권6호
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• pp.319-325
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• 2011

• Journal of Advanced Marine Engineering and Technology
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• 제40권1호
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• pp.17-27
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• 2016

The need for storage and transportation facilities of liquefied natural gas have increased significantly because of global environmental regulations and recent shale gas innovation in North America. There is severe competition between Korea, Japan, and China for receiving manufacturing orders of LNG carriers or LNG storage tanks. Rationalization of the welding process used in the manufacturing of LNG facilities plays an important role in the above competition. This review paper presents the current global status and tendency for the development of latest welding technologies for LNG storage and transportation facilities. This article intends to present materials for raising the domestic competitive power for receiving manufacturing orders of LNG facilities.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• 제28권2호
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• pp.42-47
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• 2014

The urban railway station is a structure that consumes a large amount of electric energy. Thus, the rationalization of using electric power is acutely demanded, but statistical data and design criteria that consider operating power load characteristics and structures, are very insufficiency. Therefore, this study investigated and analyzed that electricity consumption a year, characteristics, gross floor area of the station, structure, and etc, on the basis of Seoul metro station 1~4 line. Through regression analysis theory, we verified the overall features and the main tendency by analysis of specific parameter value(average, maximum, minimum, etc). The object of this study is the analysis about power density considering structure of the urban railway station, managing electric energy for the rationalization and setting a new standard of maintenance and construction.

• Journal of the Korea Safety Management & Science
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• 제17권1호
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• pp.149-168
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• 2015

It is expected that the temperature in Pyeongyang will be similar to that ($16.6^{\circ}C$) in Seogwipo in the late 21st century, and most of South Korea will enter the subtropical climate due to climate change. Change in the precipitation pattern like the range of fluctuation caused by climate change will lead to expanded uncertainty in securing reliable water supply, along with a serious impact on demands for living and industrial water due to change in the volume and period of river outflow. As industrial water for production activities is estimated based on the contract quantity, it is difficult to apply rationalization of water usage and incentives in water recycling. Therefore many companies are making efforts in complying with the effluent standard while spending few resources on such rationalization and recycling. This study researched water risk management over 115 Korean companies by 28 questions in 4 categories. Through the research, this study aims to understand water risk management levels and seek response plans.

• Journal of the Korean Society of Marine Environment & Safety
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• 제12권4호
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• pp.241-246
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• 2006

We badly need the plans to promote practical and systematic utilization of safety management system as the safety management in coasters is not yet sufficient although the government and shipping companies are making efforts to protect human life and environment in ocean. This thesis executed questionnaire survey on related organizations and shipping companies followed by proof analysis and suggest plans to make it useful safety management system suitable to coastal marine transport of the country through grasping and improving the points of problems in current safety management on coastwise vessels.

• Journal of the Korean Solar Energy Society
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• 제34권4호
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• pp.101-109
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• 2014

The Consultation about Energy Use Plan is prescribed by the Energy Use Rationalization Act. This study calculated the Standard Data for Energy Use Plan of Industry Complex by the 9th Korean Standard Industrial Classification Divisions so that the energy demand reflecting the industrial technology change and characteristics of Manufacturing Divisions would predict. To achieve this aim, analysis on thousands of data in Energy Consumption Report Forms reported from industries which annual consumption of energy exceeds 2,000toe from 2009 to 2010 was carried out. The results showed that calculated overall mean fuel basic unit decrease, electricity basic unit increase and energy basic unit increase compared to that of the Notification No. 2002-130 of the Ministry of Commerce, Industry and Energy, therefore it means that heat source of energy facilities transferred from fuel to electricity. Also resultingly suggests that the related notification, code etc. are amended as soon as possible.

• The Korean Journal of Health Service Management
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• 제9권4호
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• pp.157-169
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• 2015

Objectives : The aim of this study was to investigate the effect of various Republic of Korea policies, including the medicine cost rationalization policy implemented By investigating the management strategy/performance changes of the industry caused by such policies. Methods : Pharmaceutical companies listed on the national stock exchange and the KOSDAQ were examined for 10 years from 2004 to 2013. Their financial statements were collected and market changes before and after drug price policy implementations were compared. Results : From the result of this research, among the medicine related policies, the drug price rationalization policy was found to have a significant effect on business management strategies in terms of safety, profitability and growth potential after its implementation. After the drug pricing transparency policy was implemented, management strategies were affected significantly in terms of safety and profitability. Conclusions : As a result, all of the medicine related policies were found to have regulatory effects. Based on these findings, implications, research limitations and future study plans are presented.

• Journal of Korean Society of Industrial and Systems Engineering
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• 제37권4호
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• pp.168-176
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• 2014

The enterprise life cycle derived from the product life cycle consists of introduction, growth, maturity and decline. The enterprise tries to reach the growth stage early and stay at the maturity stage stably through expanding its businesses and investing for the new technology. The public enterprise is not different but its life cycle is more prone to be affected by the national development and policy. A typical example can be found in the case of the quasi market SOC public enterprise which spends massive amount of fund to provide social infrastructure. After the fulfillment of its mandated mission it is exposed to the pressure of a merger or a closure usually because large portion of the debt is directly linked to the national financial stability and credit ratings. This research is focused on the variables that influence the life cycle of the quasi market SOC public Enterprise for its future competitiveness is in connection with its normalization, advancement and rationalization. In this respect, categorical variables system centering on public characteristics and profitability drew eight categorical variables such as policy outcomes, public benefit, finance and business values etc.