• Journal of the Korean Society for Railway
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• v.12 no.1
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• pp.167-174
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• 2009

Due to the travelling of the train with high speed the period of maintenance activities of the ballasted track is coming to be short, and more from the residential area of the ballasted track tunnel circumference the civil appeal is increasing with railroad vibration problem. To reduce the vibration problem and a maintenance cost establishes the ballast mat in the tunnel within part segment. In this study, to estimate the vibration reduction effect of the ballast mat we have done a comparative analysis with the vibration field test by the transit train by at the ballasted track with ballast mat and the standard ballasted track without vibration protection in tunnel.

• Journal of the Korean Society for Railway
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• v.19 no.4
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• pp.498-505
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• 2016

As a basic study to develop maintenance-effective optimal ballast track in preparation for upgrading a conventional line to a high speed railway, a full-scale test that combined the components of ballast track was conducted and the characteristic of track settlement was analyzed. As a result of the full-scale test, reduction in maintenance via an increase of the elasticity of only the pad was insignificant; however, the effect increased significantly with increasing of the weight of the sleeper or with increasing of the weight of the sleeper and the thickness of the ballast together with use of a pad with high resiliency. An optimal type of ballast track, in line with upgrading the speed of a conventional line, shall be developed through cost efficiency analysis considering the maintenance cost depending on the track settlement as well as the initial construction cost.

• Journal of Korea Game Society
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• v.2 no.2
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• pp.66-71
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• 2002

The common lives of the korean people reflect the feeling and emotion of their own world irrespective of rank and class. The folk picture which has the humor, feeling of the korean people, has been with the whole nation throughout times. Therefore it reveals the imaged tradition, recordable character and the truth. It is the folk picture that is the first stream of the game graphic. Because it has its own world built by timeless culture, philosophy, religion, art, and so on. When the game is understood as the reappearance of virtual truth, and the whole new world of the game players, it is really necessary to develop the game graphic with creative plans and artistic value. It is the time to focus on the korean folk picture as a new sources of the contents. Then it is obvious to solidfy the groundwork of the game industry if people at all ages play games as a result of reinterpreting and developing technical tools for the korean folk picture for the present age.

• Journal of the Korean Society for Railway
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• v.18 no.6
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• pp.552-557
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• 2015

Ballast gravel in a railroad field is often polluted by grease and heavy metals. In this paper, the performances of a dry cleaning method for polluted ballast gravel in which pollutants on the gravel surface can be physically removed was extensively studied. A polluted ballast cleaning device able to shoot emery blasting media onto the surface using compressed air was prepared. Polluted ballast gravel was put into this device for cleaning, with the treatment time varied from 1 to 10 min. The cleaning efficiency of the total petroleum hydrocarbons and heavy metals were studied. The total petroleum hydrocarbon removal efficiency was 70-80% for gravels sampled from a locomotive waiting line, while it was 40-60% for gravels sampled from a turnout area. The heavy metal removal efficiency exceeded 90% for copper and lead, while it was 65-80% for nickel and zinc. This system was found to be effective for the remediation of polluted ballast gravels.

• International Area Studies Review
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• v.15 no.1
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• pp.549-570
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• 2011

The purpose of this article is to review the current states and future trends in the more developed countries(MDC), the less developed countries(LDC), and Korea. In 2009, the percentage of persons ages 65 and older in the world's population is 8%. However, the ratio of elderly to the total population is higher in MDC than LDC (and Korea). In future, population ageing will be a serious social problem in the LDC (and Korea). Population ageing process will occur at a much faster rate in LDC (and Korea). The reason is that the demographic transition in LDC (and Korea) has occurred in much shorter and recent periods. Though the ageing indices such as the old-age dependency ratio, aging index, and the median ages are higher in MDC, they will change rapidly in LDC. In addition, the oldest old population will increase in LDC than MDC. Therefore, when establishing the government policy related to population ageing, we need to consider the different population ageing process between in MDC and in Korea(or LDC).

• KOMUNHWA
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• no.53
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• pp.3-26
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• 1999

• Railway Journal
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• v.14 no.1
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• pp.49-50
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• 2011

• Journal of the Korean Society for Railway
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• v.13 no.5
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• pp.500-503
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• 2010

Until now, the track circuit with railroad which is a part of an electrical circuit wad used only for the detection of the train location, but as train speed is up to be higher, in order to overcome the limits of ground signal system the railway signal system has changed from the ground signal system to a cab signal system. The power source of the track circuit has also changed from a direct current or a high voltage impulse to an alternating current with high frequency which is a part of the audio frequency. To improve the maintenanability and according to the environment condition, the railway roadbed is rapidly changed to the ferroconcrete roadbed. In case of a track circuit to use an alternating current with high frequency as power source at a ferroconcrete roadbed, the characteristic of the track circuit is brought on a change from a loss of the magnetic combination instead of a leakage current from electric insulation which was caused by the reinforcing iron pod with lattice shape for durability. This paper is shown the influence and the loss of the signal current at AF track circuit on a ferroconcrete in the simulation sheets and presented a proposal for the preventive method from reduction of signal current.

• Journal of Science of Art and Design
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• v.10
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• pp.51-72
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• 2006

Reinterpretation of the visual characteristics of Korean folk painting in contemporary Korean painting is to seek directions of today's Korean painting. When examining expressions of contemporary painting we see that there is a reappearance of iconic images, a reinterpretation of both flatness and multi-perspectives, and an objectifying of pastiche folk icons with an experimental spirit. All of these techniques suggest methods of contemporary Korean painting through 'folk painting'. Although folk painting has been adopted in contemporary Korean painting for a long time, interest increased in the 1980s. With the prevailance of both national characteristic expressive techniques of realism and color painting, artists reinterpreted folk painting in their work, borrowing the traditional five colors, common contents, and iconic images. Particularly, an interest in 'Korean Beauty' drew people's interest back to folk painting which provided the significant 'Korean Beauty' of traditional expressive techniques. This study is to examine the characteristics of selected group of works that created a new expressive technique in today's Korean painting by either the reappearance or the reinterpreting of iconic images of the Chosun Dynasty's folk painting. To achieve these goals, the artists, who modify or reinterpret folk painting's visual characteristics with a contemporary sense, are divided into three categories in this study; 'The Readoption of the Folk Image', 'The Reinterpretation of Folk Characteristics', and 'Experimental Expressions'. As a result, it proves that folk painting is both a classical expression and national expression which was not only favored in the Chosun period, but also can be reinterpreted through today's visual methodology.

• Proceedings of the Korea Technology Innovation Society Conference
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• 2015.11a
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• pp.709-715
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• 2015

주요 선진국에서는 개발도상국을 지원하기 위해 자금, 교육, 의료, 인프라 등 다양한 프로그램이 존재하고 있다. 하지만 개발도상국이 지속적으로 성장하기 위해서는 창의적인 활동의 증가, 사회문제 해결형 혁신 등 실질적인 도움으로 연결될 수 있어야 한다. 본 연구는 복지형 아이디어 지원 플랫폼의 대표적인 모델로써 창조경제타운을 개발도상국으로 확산하는 방안을 제안하고자 한다. 이를 통해 개발도상국의 창의적인 아이디어가 발현되고 혁신형 창업으로 연결될 수 있는 적용 가능성을 탐색하였다. 개발도상국에서 국민들이 아이디어를 제안하면 선진국의 전문가들이 재능기부 형식으로 온라인 멘토링을 수행하고, 우수한 아이디어의 경우에는 세계은행 등과 협력하여 실제 사업화를 지원할 수 있어야 할 것이다. 성공적인 사업화 지원을 위해서는 언어 번역기, 화상회의 시스템 등이 필요하고, 선진국과 개발도상국 정부와의 협력을 통해 사업화 지원 프로그램이 확산될 수 있도록 해야 한다. 본 연구에서는 이러한 접근법의 하나로 우리나라에서 성공적으로 운영되고 있는 창조경제타운 모델을 채택하였으며, 글로벌로 확대 시 필요한 요소들을 조사함으로써 지속가능한 선-후진국간 글로벌 혁신 플랫폼의 한 형태를 제안하는데 목적이 있다.