• Korean Journal of Heritage: History & Science
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• v.45 no.2
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• pp.38-53
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• 2012

The transition process of the Balhae's capital system(都城制度) is a step-by-step marker of the completion of the state's governing system(支配體制). The most important subject in investigating the formation process of the capital of Balhae is Shanggyeongsheng(上京城). That's because Shanggyeongsheng(上京城) with a threefold-castle structure(三重城) of royal palace(宮城)-internal castle(內城)-external castle(外城) in the side-to-side checkerboard type symmetrical structure has the most paradigmatic castle structure not only in Balhae but also in East Asia. Despite the fact that such structure of Shanggyeongsheng(上京城) has a lot of similarities in the type with Sudangchangansheng(上京城) in Chungwon, scholars were skeptical that it had the same structure with Sudangchangansheng(上京城) at the time when transferring the capital. If we review the result of excavation of Shanggyeongsheng(上京城) and the findings of the senior scholars, it can be understood that Shanggyeongsheng(上京城) has not only the structure of Sudangchangansheng(上京城) but also accepted the principle of construction projected in it. It was confirmed that there is room for reconsideration on the theory of step-by-step construction(段階別築造) which was claimed based on the point that the construction like today's construction was impossible with the level of national power at that time in that the layers whose difference in construction time between the place No. 2, the central point of the royal palace, and the palaces No. 3~5 could be found were not identified, in that the whole Shanggyeongsheng(上京城) was planned by the same standard scale and finally in that there is a good possibility of accepting Samjoje(三朝制). The Shanggyeongsheng(上京城) is the result of the construction conducted by careful planning from the beginning, and with its close relation with the King Mun's(文王) policy of civilian government(文治), it shows that the governing system of the state was completed during the reign of King Mun. Therefore, the construction of the capital and the principle of construction(造營原理) projected in it are based on the premise that the Chungwon culture(中原文化) was being understood to a considerable level, and this means that the view of the world(天下觀) that he wanted to implement expanded throughout the whole Balhae.

• Korean Journal of Heritage: History & Science
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• v.45 no.3
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• pp.4-27
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• 2012

The five capital(五京) was installed in the $Li{\acute{a}}o$(遼) Dynasty. $Sh{\acute{a}}ngj{\bar{i}}ng$(上京) was the main capital city of the $Li{\acute{a}}o$(遼) Dynasty. $Zh{\bar{o}}ngj{\bar{i}}ng$(中京) was the second capital(陪都); and the other three was the capital city with symbolic meaning. The layout of $Sh{\grave{a}}ngj{\bar{i}}ng$ was the '日-shaped plan; this was newly advent structure of ancient Chinese capital city system. $Zh{\bar{o}}ngj{\bar{i}}ng$(中京) was surrounded by multiple ramparts influenced by the $Bi{\grave{a}}nli{\acute{a}}ng$ Fortress (?梁城). Three capitals, Nanjing(南京), $X{\bar{i}}j{\bar{i}}ng$(西京) and $D{\bar{o}}ngj{\bar{i}}ng$(東京), were reconstructed on the foundation of the previously constructed town in $T{\acute{a}}ng$(唐) or Bohai(渤海) Fortress (舊城). The structure and Planning of $Sh{\grave{a}}ngj{\bar{i}}ng$(上京) in the $Li{\acute{a}}o$(遼) Dynasty, had significantly influenced in the capital city planning of the $J\bar{i}n$(金), $Yu{\acute{a}}n$(元) and Qing(淸) Dynasties of China

• Korean Journal of Heritage: History & Science
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• v.45 no.3
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• pp.114-159
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• 2012

The Northern Song Dynasty Period (北宋時代) was a drastic transitional era in all aspect of Chinese society including the politico-economic system, ideology and cultural trait. These changes that began in the late Tang (唐) Dynasty Period accomplished in the Northern Song Dynasty. In this phase, the fundamental change influenced in all institutional area; and among them, the capital city planning and its associating building technology to pile stone walls shows one of the significant change of those time. Based on the geographical factor, confluences of many rivers, the Kaifeing (開封) area where the BianLieng palace had developed as a political and economical centre since the Tang Dynasty when the Grand Canal was constructed. According to archaeological researches, the central city structure of Dongjing Walled Town was begun to plan in the late Tang Dynasty and formed in Five Dynasties. The fundamental functional change of city completed in the Midnorthern Song Dynasty. In spite of the relatively late beginning of archaeological investigations to Kaifeng Walled Town and Dongjing Walled Town due to unfavourable natural environment, excavations inaugurated since 1981 have achieved the significant investigations including the actual measurement and excavation to the outer wall, the preliminary excavation to the inner city area, the investigation and excavation to the royal palace of Song and the survey to the royal palace of King Zho in the Ming (明) Dynasty. These surveys have provide important data to reconstruct the 변량 palace, and elucidate the characteristics of city plan in the Dongjing Walled Town and the institutional change of capital city plan of the Northern Song Dynasty. The basic layout of Dongjing Walled Town reflect the realisation of ideality of the late Chinese medieval capital city structure that establish the commercial and economic centre based on the intensification of emperor's power by means of the organisation of ethical institution and the development of commercial economy. Firstly, the central place of the Kaifeng area is encircled with triple walls. This emphasise the authority of emperor located on the summit in the hierarchical ethic system succeeding to the main capital city plan of the late phase of ancient China. Secondly, the location of Dongjing Walled Town was decided by the transport network and the commercial function and defence function. Thirdly, this site shows the change of city structure and landscape of the Northern Song Dynasty. The closed Fengri (坊里: block) system transferred the open Jiexiang (街巷: road) system. Fourthly, the capital city was characterised by the free market trade and the diversification of market place. Fifthly, a convenient transport network in the Bian River, a centre of the Grand Canals, enabled to construct the Kaifeng Walled Town. Therefore, the Northern Song Dynasty continuously accomplished the developed water system as concerning about the utilisation of waterways after the construction of city.

• Korean Journal of Construction Engineering and Management
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• v.19 no.1
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• pp.65-73
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• 2018

Since unfair trading practices between participants in construction project are common, the government has enforced several policies and systems to prevent or minimize the unfair trading practices in construction industry. However, not much attention has been paid to figure out which policies or acts are working or not. This paper analyzed the effectiveness of the policies and acts which are being implemented to prevent unfair trading practices and provided several suggestions to improve the performance of those acts. Survey was conducted to industry experts to collect data regarding their perceptions on those policies and acts. Then the effectiveness of the policies and acts were analyzed in terms of their importance and performance through IPA (Importance-Performance Analysis) based on the survey result. It was found through IPA that execution related acts such as investigation, exposure, and punishment for unfair trading practice have shown low effectiveness in entire construction process and dispute arbitration and mediation related center operated by authority showed low performance too. To improve the effectiveness of those acts, dispute arbitration system improvement, investigation & reporting system consolidation and enhancement practical binding force of punishment and penalty were suggested. Most of all, rules and culture for fair trading should become more established in construction industry by preventing conflict among participants through active communication.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1993.10a
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• pp.561-565
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• 1993

본 연구에서는 산업 현장에서 일반적으로 가장 많이 사용되는 CAD 소프트웨어를 이용하여 모든 기계류에 공통적으로 쓰이는 기본적인 기계 요소들에 대한 자동 설계 시스템을 구축하려는데 목적을 둔다. 이는 단순히 제도 수준에만 머무르고 있는 현재의 CAD 시스템에 사용 조건에 맞는 기계요소에 대한 강도를 평가하여 적절한 기계 부품을 자동적으로 선정하고 도면으로 보여 주는 기능을 부여하여 생산성을 높이는데 그 의미가 있다. 또한 설계 과정의 자동화 가능성 여부에 대한 타당성을 검토하고자 한다. 연구방법으로는 C언어를 이용하여 각 기계 부품에 대한 설계(선정) 프로그램과 데이타 베이스 관리 프로그램을 작성하고, LISP언어를 이용하여 선정된 기계 부품을 자동적으로 그려 주는 방안을 제시한다. 개발에 사용된 CAD 소프트웨어는 PC에서 가장 많이 사용되는 AutoCAD를 사용한다.

• Journal of the Korean Society for Geothermal and Hydrothermal Energy
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• v.15 no.2
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• pp.10-16
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• 2019

In this study, the present regulation of heat metering for the ground source heat pump was investigated. The ground source heat pump has been adopting the heat metering system used in the district heating system for estimating the heating and cooling energy production amount. The accuracy of the present heat metering systems for a water to water ground source heat pump is low, because the system for district heating has a relatively high temperature range comparing with the ground source heat pump operating conditions. Even though the heat amount for the building side should be measured, the heat absorption and extraction amount from or to the ground was measured for the water to air ground source heat pump due to the difficulty of estimating the air side heating and cooling capacity in the present regulation. It is highly recommended to validate the heat metering system to have reliability for the ground source heat pump and develop the system to be applicable water to air ground source heat pump.

• Journal of the Korean Institute of Traditional Landscape Architecture
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• v.33 no.4
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• pp.129-139
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• 2015

Parks in order to find the inspiration and implication from their construction. The research is focused on a few cross-sectional city wall parks, which are Huangchenggen city wall park, Ming city wall park and Yuandadu city wall park. to come to the conclusion, it defines the generic concept of city wall park, clarifies the transitional process of the city of Beijing, organize the current situation and basis of the construction of the Beijing city wall parks. besides, by analyzing the Beijing city wall parks' specific construction manners including the basis of their planning, the support by government, planning functionality, landscape theme arrangement and gardening arrangement, the research puts forwards their construction characters and drawbacks. through comprehensive analysis on the aspects above, a series of inspirations are obtained for the construction of city wall parks. these include: specialized and legally valid regulation systems need to be setup before planning; government and citizens' proactive support is necessary for the protection of ancient city wall ruins and the construction of the city wall parks; when planning, existing situation should be utilized to the maximum extent, efficiency of space usage should be improved through smooth connection between different spacial locations.

• Journal of the Korean Institute of Traditional Landscape Architecture
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• v.30 no.4
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• pp.81-92
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• 2012

The purpose of this study is to compare values, characteristics and the world heritage listed tendency of walls in East Asia. Walls in East Asia are similar by the geographically adjacent, type, form and materials, etc. Thus to demonstrate the differentiation is not easy, but walls heritage of a tentative list or listed on the UNESCO World Heritage were discriminated by the evaluation criteria of world heritage. Hidden problems are not to be described the differences by the consistent manner. So we need efforts to separate the distinction and originality of walls according to the characteristics of each heritage. As the method of this study, we reviewed the terminology associated with the wall and then have examined the following four aspects as the characteristics of each heritage category. 1) Classification according to the function and purpose, 2) Classification according to the type and size of the walls(the length of wall), 3) Classification according to the location and topography, 4) Classification according to materials and technology(construction method). And we have analyzed the tendency of OUV(Outstanding Universal Value) of the world heritage listed wall. Also we examined the value basis of the differences and similarities presented by each heritage. In the future, we should complement the following two aspects of the wall heritage in East Asia for comparing the exact value. first, we ought to come up with a system that we can easily compare the similarities and differences of similar walls heritage. Second, we have to make every effort to describe the walls heritage by considering OUV evaluation criteria to be able to share with people all around the world.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.19 no.3
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• pp.90-99
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• 2020

The "Low Emission Zone" (LEZ) system restricts entry of vehicles with high air pollutants into city centers. Implementation of the system improves air environment around the world. Since 2012, operating restrictions have been applied to all of Seoul's metropolitan areas and some other metropolitan areas in the state. Beginning in December 2019, entry of 5th class vehicles to the central green transport zone of Seoul has been restricted. In this study we examine the status of operational restrictions in this zone, and predict the amount of traffic reduction expected when numbers of target vehicles are expanded in the future, we use data for each vehicle's emission grade: by region and 'Origin-Destination Traffic Volume'. After estimating the amount of traffic entering Seoul's 25 autonomous districts, by emission class, we propose a target region that may have a significant effect if target areas for automobile operation restrictions expand in the future.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.1
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• pp.125-137
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• 2011

This study aims to know whether the Accreditation of Hospitals can help to improve productivity of hospital and affect the conversion factor. Based on the Malmquist productivity Index, the productivity of accredited hospital improves. There exists an tendency that as the scores of Accreditation rises, productivity increases. Also the higher the productivity, the lower the conversion factors in the rigid statistical evidence. This evidence is independent of hospital classification, geographical distribution, grouping. This evidence supports the productivity index can be included in the fee negotiations. It also means that rather than static efficiency, the multi-year change of productivity information can be usefully combined to set a conversion factor in Korean National Insurance Contract especially in the discussion of the structural change of payment system.