• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2014.04a
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• pp.700-701
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• 2014

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2014.04a
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• pp.332-333
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• 2014

• Proceedings of the Acoustical Society of Korea Conference
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• autumn
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• pp.183-186
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• 2001

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.3
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• pp.2135-2140
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• 2015

In this paper, proposed a new lighting control system which can reduce power consumption compared to conventional street lamps and intelligently control the light efficiently depending on whether there is a vehicle on the street. The new lighting control system proposed by this paper detects the presence of cars by collecting and analyzing sounds generated by the movement of cars. Then, the system controls lighting of street lamps based on the above car detection information, and turns on the street lamps sequentially by transmitting the car detection information. Experimental results showed that lightings were controlled based on the presence of cars and that operations of the lamps were made by turning on the lights sequentially by determining the moving direction of cars. This system is considered a technology that can reduce energies by applying to local roads with a few cars moving or national highways where lights are always turned on with low energy efficiency.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2016.10a
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• pp.579-582
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• 2016

Recently, wireless communication system has been widely used in a variety of fields along with the remarkable advancement of communication technology. Sound communication system in underwater wireless communication is utilized in underwater communication since it has better transmission capacity than the existing RF. However, sound communication system has the problems such as low speed communication, transmission delay and limited bandwidth, and the studies have been actively conducted on the visible light communication underwater to improve these problems. Therefore, the visible light communication underwater using ASK modulation is suggested for the effective communication in this article.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2007.11a
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• pp.35-36
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• 2007

• Proceedings of the ESK Conference
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• 1995.10a
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• pp.172-181
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• 1995

A control panel layout system was developed to generate an ergrnomically sound panel design. A constraint satisfaction concept was introduced as a framework of incorporating diverse ergonomic design guidelines into the panel layout. An efficient search algorithm which can find a constraint satisfaction solution within a reasonable time was developed based on preprocess and look ahead procedures with the backjumping technique. The proto- type panel layaout system was developed on a SPARC workstation. The constraint satisfaction algorithm was programmed in C language with Motif as a GUI tool under the X-windows environment. The effectiveness of the prototype paned layout system was examined by a case study.

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 1992.12a
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• pp.17-18
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• 1992

최근 유럽을 중심으로 암면을 이용한 양액재배가 가장 활기를 띠고 있으나 사용한 암면의 처리가 사회문제로 대두되면서 암면 대체배지 개발이 다방면에서 시도되고 있다. 국내에서도 국내여건에 맞는 양액재배용 배지의 개발이 적극적으로 검토되어야 할 상황으로 판단된다. 따라서 본 연구에서는 그동안 토마토 양액재배용 배지에 대한 검토결과에서 좋은 결과를 보인 입상면, Vermiculite 및 Perlite를 중심으로 하여 유럽에서 검토되고 있는 Polyphenol수지와 국내에서 쉽게 구입할 수 있는 배지들을 모아서 고추 양액재배용 배지로서의 이용가능성을 검토하였다. (중략)

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 2007.05a
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• pp.230-234
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• 2007

• Proceedings of the KSR Conference
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• 2004.06a
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• pp.658-663
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• 2004

The interaction between a vibrating structure and a surrounding acoustic medium determines the acoustic power propagating into the far-field. A straightforward method to reduce the radiated power is to reduce the vibration of the structure. However it is more efficient to control the modes of the structure separately since each vibration mode of the structure has different radiation efficiency. An efficient method to reduce the sound radiation in the low frequency region is proposed by reducing the radiation efficiency of the structure.