• Journal of the Korea Institute of Information and Communication Engineering
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• v.18 no.11
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• pp.2753-2758
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• 2014

Around-View, the image processing device which increases the comfort of drivers is sold in the market. This system prevents accidents in advance while driving or parking. The accidents are caused with their inexperienced driving or bad visibility. It is developed for driving convenience. However, it dosen't spread to the driver widely due to the problem of the high installation costs and complex installation process. First, expensive equipment second, difficult development environment and third, inconvenient installation procedure. So the drivers don't have many opportunities to use this system and dare to develop this system. I think if one of the problems can be solved, users might be able to access this system at low cost. In this paper, the AVM(Around-View Monitoring) minimizes two of them. Expensive equipment, inconvenient installation. The costly problems were solved by using low-cost USB device and rear cameras. In view of inconvenient installation process, the new system was designed to make it easy for people to install it. Through this, it can ease the burden of consumers.

• Journal of the Korean Institute of Rural Architecture
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• v.21 no.2
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• pp.43-51
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• 2019

The purpose of this study was to examine the current status of the use of bike parking lots in apartment complexes located in Gwangju Metropolitan City. The results were as follows. While common respondents answered the use of a bike for leisure or health, relatively few respondents answered a means of transportation such as going to school or work. It suggests that systematic plans to expand the range of using a bike should be made such as the connection of an apartment complex with a bike road. The common places to keep bikes were the entrance, the inside of the house, or stairs rather than bike parking lots because of safety problems such as theft or damage. In this regard, it is necessary to prepare clear regulation guidances to complement the safety problems of bike parking lots such as CCTV installation in the parking lots or compulsory installation of night lighting. Based on the findings, the methods to improve a bike parking lot should consider safety solutions and the complement of locations or keeping types. To activate the use of a bike, it is necessary to improve facilities to help residents' use of bike parking lots and expand their size in the future and examine the design of bike racks.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2004.11a
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• pp.169-174
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• 2004

As quality of life improves, apartment's residents prefer residing type that have differentiation of resident center. Accordingly, community facilities such as fitness club, swimming pool, and so on are operated in apartment complex. Community areas are important space that can induce inhabitantses' natural meeting and contact, and that can solve social problems which is started each individuals' estrangement in current through community formation between neighborhood. From this point of view, this paper investigated the essence of light and the luminous environment for community areas. This paper finally suggested well-coordinated lighting plan of community areas, derived from the measurement and analysis of luminous environment in these cases.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2005.05a
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• pp.92-94
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• 2005

In this paper, when electric train is in dead-section the effect on electric train system was dealt. The feeding system of electrical railway is AC or DC. When the electric train is passed AC feeding system to DC, vice versa or phase is changed in between AC feeding systems, there is a dead section. A dead section usually makes the electrical system complex md may have an adverse effect on the electrical system inside the train. Accordingly, it is important to analyze the effect on trains in dead-section. Modeling an electric train and simulation using PSCAD/EMTDC was accomplished to analyze how power quality problem such as inverter switching surge is propagated to electric train through the feeding line, railway, pantograph.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2007.05a
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• pp.1090-1095
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• 2007

A study was carried out to investigate the fluid-structure interaction phenomena of buried hydrophone system that exposed complex loads due to handling, transportation and installation. The buried hydrophone system has necessarily neighborhood structures for installation. Because of the neighborhood structure, acoustic field is deformed. We analyze the piezoelectric-structural-acoustic coupled problem and the results to use a finite element analysis software, ANSYS, which has an coupled field analysis capability. The effect of the component of hydrophone system is revealed altogether in pressure distribution. So, we classify and analyze the problem by four different compositions for decomposition.

• 한국신재생에너지학회:학술대회논문집
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• 2006.11a
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• pp.503-506
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• 2006

Recently, small hydropower attracts attention because of its clean renewable and abundant energy resources to develop. However, suitable turbine type is not normalized yet in the range of small hydropower and it is necessary to study for the effect ive turbine type. Moreover, relatively high manufacturing cost by the complex structure of the turbine is the highest barrier for developing the small hydropower turbine. Therefore, this study is trying not only, to classify the type of current operating turbines installed in the domestic power plants and turbines supplied in Japan by Japanese manufacturer but also, to examine the practical turbine type and installation site to extract the small hydropower energy effectively.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.14 no.3
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• pp.59-67
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• 2000

This paper describes the unified reliability evaluation with partial loss of continuity for Inchon international airport distribution system which is complex and difficult system to implement. To evaluate reliability considering line limitation and voltage drop of the system, PLOC technique which is based on deterministic evaluation technique and failure mode & effective analysis method is employed. And reliability indices calculation method is used. Finally, to evaluate the system performance and to improve the reliability of the system, Analytic network process method is employed. As a result, calculating accurate reliability, finding weak points, and expansion scheduling of the system is possible.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.25 no.7
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• pp.63-71
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• 2011

Due to the rapid development of digital technnology and informantion communication, in the IEC 61850 based substation automation system, the innovative paradigm shift is expected and also required in many substation-related jobs, especially in the device function test area Accordingly a common testing model which can simplify the complex contents of the SAS performance test performed by test engineers has been identified, that can overcome limitations of engineers' own testing knowledge and experience. Testing models and its design system for the comprehensive performance test of the Substation Automation System is developed and the result of the study is reported in this paper.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2007.05a
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• pp.421-423
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• 2007

The paper used to the Neral Netwok for a forecasting conservation system A neural network is a powerful data modeling tool that is able to capture and represent complex input/output relationships. The motivation for the development of neural network technology stemmed from the desire to develop an artificial system that could perform "intelligent" tasks similar to those performed by the human brain. The true power and advantage of neural network lies in their ability to represent both linear and non-linear relationships and in their ability to learn these relationships directly from the data being modeled. Form results of this study, the Neral Netwok is will play an important role for insulation diagnosis system of real site GIS and power equipment using $SF_6$ gas.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.27 no.8
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• pp.98-104
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• 2013

AC machines are in wide use in industry and d-q transformation from 3 phase of a, b, c is commonly used to analyze these kinds of machines. The equivalent circuits of d and q axis are, however, generally cross coupled and difficult to analyze. In this study, a modeling technique of AC machine including induction and PM synchronous motors using matrix vector is proposed. With that model, it can not only explain the AC machines physically but also make it simple to analyze them. The separating process of d and q components is not needed in this model and this model can be applied to analyze asymmetric motors like IPMSM machine. With this technique, the model becomes simple, easy to understand physically, and yields results that are the same as those from other models. These simulation results of the proposed model for induction motor are compared with those of other models to verify the method proposed.