• Journal of the Korea Society of Computer and Information
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• v.12 no.2 s.46
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• pp.161-170
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• 2007

This paper is a matter of remote control apparatus and display remote control system comprising the same. The remote controller is a wireless remote pointing device that is included a function of mouse and a function of remote controller for VOD etc. It is assembled a sending signal part to communicate with display device, a image sensor part to capture a scene of front view and a main body. Also, it includes a control part that analyzes the captured image, calculates a relative moving factor that main body is moved by user, and then controls the mouse cursor on the display device. The remote control apparatus is able to capture a seen of front view, to analyze the captured image, and to move a mouse cursor point on the display device as much as it calculated relative moving factor. Therefor it brings don the cost of production by a product desist that is increased user satisfaction. And it, using the patent and the new product desist, will make an epoch in development of the remote control system for Ubiquitous broadcasting industry.

• Journal of the Korean Magnetics Society
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• v.4 no.4
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• pp.326-334
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• 1994

This paper describes the fabrication of the hydrophilic magnetic fluid with high viscosity and its application to oil seal apparatus used with the Nd-permanent magnet. The results are as follows. 1) The ultrafine magnetite particles under the size of $100\;{\AA}$ are first coated by the oleic acid ion and again adsorbed by the hydrophilic D. B. S. ion, and there by hydrophilic magnetic fluid with high viscosity could be made by dispersing them into the ethylene glycol. 2) In development of the oil seal apparatus using magnetic fluid and Nd-permanent magnet, the viscosity and magnetic susceptibility show high when the $Fe_{3}O_{4}$ content is over 50%(g/cc) in the fluid, so that such properties could improve highly the capability of oil seal. 3) The maximum of the resisting pressure of the oil seal using the ethylene glycol base magnetic fluid and the Nd-permanent magnet, is about $50\;g/\textrm{cm}^2$, under the condition of this experiment. Therefore the oil seal may not be suitable for the ship engine and the driving part of the automobile, and thus it needs a lot further complementary reserch. However, it is quite favourable for such an oil seal apparatus as speed reducer under the condition of atmospheric pressure.

• The Transactions of the Korean Institute of Electrical Engineers P
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• v.63 no.4
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• pp.301-306
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• 2014

Recently in accordance with the rapid development of the industrial society, the accidents caused by dielectric breakdown have been increasing in power grid. It is important to prevent the dielectric breakdown of a high voltage apparatus to reduce the damage from electrical hazards. To establish an electrically reliable database of insulation design criteria for high voltage apparatus, a study on dielectric characteristics test is indispensable. In this study, dielectric characteristics according to field utilization factors (${\xi}$) which are represented as the ratio of mean electric field to maximum electric field are investigated. the dielectric breakdown experiments by using several kinds of electrode systems made with stainless steel are performed by AC breakdown voltage under air-insulation. Also, the experimental results are analyzed by the Weibull distribution. As a result, it is found that the dielectric characteristics of air-insulation are determined by ${\xi}$ as well as arrangement of electrode systems. It is considered that the results of this study would be applicable to designing the air-insulated high voltage apparatuses.

• Korean Chemical Engineering Research
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• v.60 no.4
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• pp.557-563
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• 2022

In order to measure the allergen penetration of micropore fabrics, it is necessary to develop a convenient and appropriate experimental method for measuring a pore size of micropore fabrics. In this study, a simple and economical experimental apparatus was developed for the analysis of the pore size of micropore fabrics by measuring the weight reduction rate. In addition, the allergen blocking properties was evaluated by measuring the pore sizes of various fabrics. According to this study, the size of the pores of the microporous fabric could be obtained by measuring the weight reduction rates. In addition, higher weight reduction rate was obtained as the suction pressure passing through the particle permeation device decreased and the suction time was increased. It is expected that the developed experimental method and apparatus can be utilized as an experimental standard for quality control methods to verify the effectiveness of micropore fabrics used for house dust mite blocking bedding.

• Journal of the Society of Naval Architects of Korea
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• v.61 no.3
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• pp.161-169
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• 2024

In order to investigate cavitation performance for the azimuth thruster in Large Cavitation Tunnel (LCT), the cavitation test apparatus was designed and manufactured. Generally the model scale is determined by the pod dynamometer with about 70mm diameter. Recently as ships with azimuth thruster have become bigger, the problem of the model ship installation was occurred. The model ship with pod dynamometer couldn't be installed in the LCT test section. The cavitation test apparatus and technique which can conduct the cavitation test without pod dynamometer were developed. The cavitation tests were conducted in torque identity method instead of thrust identity method. The target ship with azimuth thruster is 18K LNG bunkering vessel. As the full-scale ship test was conducted, the model cavitation tests were conducted at the same operating conditions. The fluctuating pressure levels of the full-scale ship were compared to those of the model tests. Another model cavitation test was conducted in the foreign institute and the cavitation observation results were compared to those of LCT. Through the comparison with the existing results, it is thought that the cavitation test for the azimuth thruster can be conducted in torque identity method.

• Proceedings of the Korean Magnestics Society Conference
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• 2007.05a
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• pp.29.1-29.1
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• 2007

• Proceedings of the Korean Fiber Society Conference
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• 2003.10a
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• pp.111-111
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• 2003

In our experiments using a new apparatus, the drape formation process was found to consist of three stages, seeds generation, their development and the final stabilizing stages. A new parameter R evaluating the shape of the drape was defined in terms of the vertical projection of the drape. Both drape coefficient and R-parameter are expected to be useful for analyzing the formation process of the fabric drape quantitatively.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1994.04b
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• pp.462-467
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• 1994

최근의 생산 시스템은 가공부품의 변화와 생산롯트의 변화에 유연하게 대처하며 동시에 높은 생산성을 가질 수 있 는 FMS, FMC, CIM와 같은 고도로 자동화된 유연생산 시스템으로나아가고있다. 본 연구에서는 실제상품화가 가능한 지능형 전류 감시장치를 개발하는 것을 그 목적으로 하였으며 인텔8096 단일칩 콘트롤러를 이용하여 이를 실현하였다. 개발된 장치의 성능 평가를 위해드릴가공에 적용하였다.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2010.05a
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• pp.1419-1420
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• 2010

• Proceedings of the KIEE Conference
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• 1992.07b
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• pp.637-641
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• 1992

This paper presents a fundanental method to analyze and design a Single-sided Linear Induction Motor(SLIM) as a propulsion system for magnetic levitation vehicles of DAEJEON EXPO'93 in Korea. The performance characteristics of the designed SLIM are examinated by the thrust force, the normal force, the efficiency and the power factor according to the change of input frequency. The dimension of the SLIM is 1792mm long ${\times}$ 200mm width ${\times}$ 58mm high and the rated thrust is 1300 Newtons at the operating speed of 40 Km/h.