• Journal of the Korea Academia-Industrial cooperation Society
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• v.8 no.6
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• pp.1363-1368
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• 2007

In order to utilize renewal energy such as solar power and wind power, high performance battery charge-discharge controller is essentially needed. In this paper, a PIC microprocessor-based battery charge-discharge controller for solar power system is designed and implemented. The PIC16C711 microprocessor and CCS-C compiler are used to realize stable and accurate operation of the battery controller. The proposed controller is designed to utilize the charged battery power during daytime to provide convenience to user. Current control function is included in proposed controller to cope with various type of new material energy system coming in the near future.

• Journal of the Architectural Institute of Korea Planning & Design
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• v.34 no.2
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• pp.107-118
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• 2018

A primary objective the Conjoint Building Program(CBP), as articulated in the legislation proceedings as to stimulate renewal and regeneration of old deteriorated districts. By allowing the transfer of development rights between two lots located within 100m radius or the same block surrounded by 12m wide streets, CBP encourages reconstruction of old buildings with low investment value by linking it to another lot that can buy its unused floor area ration. Most of the debates and studies prior to the introduction of the new legislation focused on possible abuse in financial terms, and little research has been done to illustrate possible merits of deficiencies in term of urban morphological influences. This study offers a visual prediction of the various ways CBP can influence an urban block by reshaping and reorganizing it thrown augmented development rights to assess the pros and cons of the current program.

• International conference on construction engineering and project management
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• 2011.02a
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• pp.510-515
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• 2011

Urban renewal projects, in the form of mega-projects, are being actively implemented both nationally and internationally to revitalize inactive cities. These programs, however, are difficult to manage efficiently due to their need for a large budget over a long period of time and due to conflicts with stockholders. Moreover, existing cost and duration management systems are structured with emphasis on the design and construction stage of unit projects, thus limiting their application to long-term mega-projects that are integrated with various facilities. To solve these problems, this study developed a web-based system that can collectively manage the cost and duration of mega-projects at a program level. The unit modules included in the system--CBS organization, construction cost and duration prediction, and total cost and duration prediction--can support decision-making at the early stage of the program. Furthermore, the modules, which include contract management, execution management, change management, and program progress management, support the program operations for its successful accomplishment. The web-based cost and duration management system developed in this study is expected to be used as a valuable tool that supports the successful accomplishment of mega-projects through their efficient management throughout their life cycle.

• Journal of the Korean Institute of Educational Facilities
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• v.4 no.3
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• pp.63-81
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• 1997

• Proceedings of the KSME Conference
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• 2004.11a
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• pp.102-107
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• 2004

In general, major components of nuclear power plant have been evaluated based on 2-dimensional design codes conservatively. However, more exact assessment is necessary for continued operation beyond the design life. In this paper, 3-dimensional stress and fatigue analyses reflecting full geometry and monitored operating condition of reactor pressure vessel have been carried out. The analyses results showed that conservatism of current 2-dimensional evaluation based on design transient. Therefore, it is anticipated that the schemes developed from this research such as 3-dimensional finite element modeling, stress analysis and fatigue analysis related techniques can be utilized as fundamental tools for exact lifetime evaluation and license renewal of major nuclear components.

• Journal of the Korean Institute of Landscape Architecture International Edition
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• no.1
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• pp.219-222
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• 2001

The planning of the central green space (residential park) in a residential quarter is an effective way of increasing public space in the process of urban development and urban renewal. It is regarded as an important technical project in the detail plan of a residential quarter in order to create a better environment in the residential quarters. The scale of a residential park, normally not less than 5000㎡, is defined according to the land-use conditions and the local population. The site should have easy access for the residents, and fit into the surrounding landscape and Fengshui whenever possible. It should also satisfy various leisure needs of the local residents at all ages. The design of the park should be friendly to the residents'interests, hobbies and aspirations. The artistic style of the landscape is to emphasize on delightfulness, harmony and warmness.

• Journal of the Korean Society for Precision Engineering
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• v.26 no.4
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• pp.120-127
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• 2009

Spindle units of machine tool are very important part in the manufacturing area. Recently high speed machining has become the main issue of metal cutting. To develop high speed machine tools, a lot of studies have been carried out for high speed spindle. Due to increase of the rotational speed of the spindle, there has been renewal of interest in vibration of spindle. This paper concerns the improvement of spindle design using design of experiments. To improve the design of critical speed and weight of spindle, the experiments using central composite method have been carried out. The targets are critical speed and weight of spindle. For optimization of critical speed and weight and optimization of only critical speed by operation of all area search through response optimizer, the result of analysis has improved design of each factor. Finite element analyses are performed by using the commercial codes ARMD, CATIA V5 and ANSYS workbench. From the results, it has been shown that the proposed method is effective for modification of spindle design to improve critical speed and weight.

• Korean Journal of Heritage: History & Science
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• v.53 no.2
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• pp.254-269
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• 2020

The purpose of this study is to propose guidance for wall renewal that is appropriate for an ancient city wall through application of advanced research and theories in wall design. It is a streetscape improvement project which forms part of the "Ancient City Image Finding Project". Study methods consist of advanced research classification, wall design theory contemplation, and analysis of the significance of designated ancient city areas and the "Ancient City Image Finding Project" status. Based on these methods, case study candidates were selected, case status and problems were identified, and improvement proposals were analyzed by comparing various features. Advanced wall research was classified into six categories including analysis of wall characteristics; wall design principle applications; wall structure, color, shape, and application; modern reinterpretation; palace walls; and house, temple, and village walls. The wall is an element of the streetscape improvement component of the "Ancient City Image Finding Project", with the characteristic of providing preceding experience in visual and cognitive awareness than interior structure. Case candidates for ancient city wall improvement are based on the composition distribution of the special conservation district in each ancient city as well as the conservation promotion district. Ultimately, the surrounding village of Gongju-si Geumseong-Dong Songsanri-gil, adjacent to the Royal Tomb of King Muryeong, was selected as the candidate. The "Ancient City Image Finding Project" of the surrounding village of Gongju-si Geumseong-Dong Songsanri-gil began with new Hanok construction. However, wall maintenance did not begin concurrently with that new Hanok construction. Support and maintenance took place afterwards as an exterior maintenance project for roadside structures. If the Hanok and wall were evaluated and constructed at the same time, the wall would have been built in unison with the size and design of the Hanok. The layout of the main building and wall of the Hanok is deemed to be a structure that is closed tightly because of its spatial proximity and tall height. Songsan-ri-gil's wall design should create a calm, subtle, and peaceful atmosphere with shapes, colors, and materials that express ancient city characteristics, but it is in an awkward position due to its sharpness and narrowness. The cause of the problem at Gongju-si Geumseong-dong Songsanri-gil, the case candidate, is that it is lacking significantly in terms of the aesthetic factors that traditional walls should possess. First, aesthetic consciousness seems to have disappeared during the selection and application process of the wall's natural materials. Second, the level of completion in design and harmony is absent. Maintenance guidance after analyzing the cause of problems in ancient city wall maintenance at Gongju-si Geumseong-dong Songsanri-gil, the subject area of research, is as follows: First, the Hanok design and layout of the wall and main gate should be reviewed simultaneously. Second, the one-sided use of natural stone wall in the Hanok wall design should be reexamined. Third, a permanent system to coordinate the opinions of citizens and experts during the planning and design phases should be employed. Fourth and finally, the Hanok's individuality shall be collectivized and its value as a cultural asset representing the identity of the community shall be increased.

• Korean Institute of Interior Design Journal
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• v.24 no.6
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• pp.22-29
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• 2015

The purpose of this study is to investigate the details of the overall interior design of the department store supermarket retail space, interior design and development, seeks to help change. In this study, a range of research the department store supermarket located in the major department store. Since 2012, new construction or renewal has been done in a department store, was investigated by selecting a total of five locations of two places in the premium supermarket. Conclusions are as followings ; First, In-store merchandising strategies, store configuration strategy, product mix strategies, and the layout plan considering the advanced strategies. Secondly, the interior guidelines are, (1)VP should be planned as an expression of a company or brand management strategies to visualize a concept image of product planning stages of merchandising to entering the store to induce curiosity to customers. (2)PP is by planning purposes, the use of lighting, directing structure, color harmony, by utilizing such as props and small parts must be able to attract attention. (3)IP is the customer to organize display, depending on the type of the display items to facilitate fraud, and the fixture plan in association with it, the customer selects a product must induced to purchase.

• The Journal of Sustainable Design and Educational Environment Research
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• v.2 no.1
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• pp.105-112
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• 2002

New buildings are to be needed for an aging society. But, there may be a solution on the multi-purpose & mixed-use existing facilities. Therefore this study is focused on verification of mixed-use school facilities's potentialities. If possible, I want to suggest some directions of renewal primary school planning. The results of this study are as follows : 1) It is important to make a policy for improving the educational environment, 2) Future buildings must be planned by the principles based on the lifelong learning, 3) Mixed-use building blocks need to be laid out by the concept of accessibility, 4) We can use existing primary school's areas as a elderly welfare facilities without any renovation and increasing areas.