• Journal of Biomedical Engineering Research
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• v.16 no.2
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• pp.191-200
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• 1995

Although air, water, and noise pollutions have been widely recognized, electromagnetic forces (EMF) hazard has been rarely recognized as a pollution and very little studies has been done in this country. Thus, in this study electromagnetic forces radiated by various home appliances, office machines, and communication equipments were measured and so were several places radiating strong EMF such as subway stations and electric substations. Among the home appliances microwave oven radiates lots of magnetic field and microwaves, and electric mattress does strong magnetic field. In video game room strong magnetic and considerable electric fields were measured. It was observed strong magnetic field inside of electric powered train and very strong magnetic and electric fields on some platforms. Hand-phone and car-phone radiate very hazardous level of microwaves to brain and that they rapidly come into wide use. In this study data base for various electric machines and places radiating strong EMFs were constructed and could be used for future epidemiological studies.

• Proceedings of the Korean Society for Quality Management Conference
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• 1998.11a
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• pp.31-36
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• 1998

250 winning products from 1985 to 1997 in the Korean market were examined in order to find that what kind of product attributes have been major determinants of commercial success in the market. The major determinants are different with product categories. For example, function has been the most important determinant in electric home appliances, while portability has been the most important in telecommunication products. The results will be a cue to the future direction of new product development.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2013.05a
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• pp.1003-1004
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• 2013

• 한국정보디스플레이학회:학술대회논문집
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• 2003.07a
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• pp.368-369
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• 2003

The recent development of InGaN-based white light emitting diodes (LEDs) has expanded their potential applications in areas such as white electric home appliances, backlight for mobile phone or notebook PC, and indoor lightings. In this lecture, recent researches related to the phosphors for LEDs applications and their luminescent properties were reviewed. PDPs are considered as the most potential flat panel displays with a large-screen size. Phosphors in PDPs directly affect the brightness and lifetime. So, many researchers have tried to improve the luminescence characteristics of the phosphors especially under vacuum ultraviolet (VUV) excitation. We overviewed recent research trends and conclusive achievements for the PDP phosphors.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2001.05a
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• pp.448-451
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• 2001

일반적으로 전기기기는 사람의 스위칭조작으로 작동이 되고 있다. 이를 개선하기 위하여 본 연구는 전기기기의 자동 스위칭과 홈네트워킹을 위한 제어용 임베디드 시스템을 설계하고, 제작하였다. 설계 제작한 제어 시스템은 PIC16F84에서 접근 센서의 입력 신호를 이용하여 전원 단속, 기기의 on/off를 수행하였으며, 내부의 상태를 감지하여 기기의 상태 표시용LED구동, 솔레노이드 밸브의 open/close 기능을 부여하였다. 본 임베디드 시스템은 통신 모듈을 구성하여 PIC의 기능을 강화하면 홈네트워킹용 시스템으로 발전할 수 있다.

• 한국전산유체공학회:학술대회논문집
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• 2002.05a
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• pp.65-70
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• 2002

Cross-Flow Fan(CFF) are widely used lot industrial equipments and household electric appliances. A design method for CFFs, however, has not been well established because of the complexity of the internal flow. Numerical analysis was performed by using STAR-CD. In this study present the internal flow of CFF, which has varies pin number, and their flowrate were compared

• The Transactions of The Korean Institute of Electrical Engineers
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• v.64 no.5
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• pp.701-707
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• 2015

Recently, it has to design the motor to raise power density because of many necessary application, such as home appliances and hybrid electric vehicles. Power of motor is made up of the torque and speed. So, if the motor which is the same size and shape is designed to raise speed, power and power density are increase.

• Proceedings of the Korea Society of Design Studies Conference
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• 2005.05a
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• pp.272-273
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• 2005

• Proceedings of the KIPE Conference
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• 2012.07a
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• pp.381-382
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• 2012

Wireless power transfer (WPT) system studied recently is very attractive because it removes power cables from home appliances, office equipment and battery chargers for electric vehicle. In this paper a pickup design method based on a conventional design method is proposed. A prototype pickup system designed according to the proposed method is constructed and tested, and its validness is verified.

• The Transactions of the Korean Institute of Power Electronics
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• v.11 no.3
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• pp.284-291
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• 2006

Recently with the motorizing of electric home appliances and car systems, there is increasing interest in high efficiency electric motors. Thus, the present study described the operating characteristics of coreless AFPM motor that is highly efficient in high speed driving, and discussed its electric characteristics from the perspective of design. In particular, we examined back electromotive force and the magnetic field characteristic in slits, which have significant effects on the characteristic of the motor, and conducted simulation and experiment on control characteristic according to inductance characteristic. This study analyzed torque speed and efficient operation characteristic as well as control characteristic through comparing the result of motor design with the result of output characteristic experiment based on the electric network method. Furthermore, we evaluated vibration and noise that may occur due to the absence of core.