• Proceedings of the Korean Operations and Management Science Society Conference
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• 1995.04a
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• pp.555-562
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• 1995

리모콘은 전자제품과 인간의 interface로서 점차로 그 사용이 증대되고 있는 실정이다. 그러나 이러한 사용증대에도 불구하고 리모콘의 디자인 설계 단계에 있어서 인간공학적인 설계원칙에 관한 고려가 부족한 것이 현실이다. 따라서 본 연구에서는 인간공학적인 설계원칙을 적용한 리모콘의 설계를 제시하였다. 이를 위하여 본 연구에서는 기존의 인간공학적인 연구를 바탕으로 리모콘의 grip형태와 grip의 크기를 파악하고 제품기능의 파악과 task analysis를 통하여 button의 종류, 크기 및 형태를 결정하였다. 또한 제품기능의 중요도와 연관성을 파악하여 conceptual layout를 실시하였다. 마지막으로 손의 인체측정치와 손가락의 운동범위를 고려한 최종적인 control button layout을 결정하였다. 연구결과에 의하여 grip형태 및 크기, button의 크기, button사이의 간격, button간 layout등의 리모콘의 설계제원이 결정되어 설계에 적용되었다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.31 no.11C
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• pp.1071-1076
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• 2006

In this paper, we develop face and hand tracking for sign language recognition system. The system is divided into two stages; the initial and tracking stages. In initial stage, we use the skin feature to localize face and hands of signer. The ellipse model on CbCr space is constructed and used to detect skin color. After the skin regions have been segmented, face and hand blobs are defined by using size and facial feature with the assumption that the movement of face is less than that of hands in this signing scenario. In tracking stage, the motion estimation is applied only hand blobs, in which first and second derivative are used to compute the position of prediction of hands. We observed that there are errors in the value of tracking position between two consecutive frames in which velocity has changed abruptly. To improve the tracking performance, our proposed algorithm compensates the error of tracking position by using adaptive search area to re-compute the hand blobs. The experimental results indicate that our proposed method is able to decrease the prediction error up to 96.87% with negligible increase in computational complexity of up to 4%.

• Journal of the Institute of Electronics and Information Engineers
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• v.52 no.8
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• pp.29-39
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• 2015

This paper describes a design and implementation of fuzzy-based algorithm for hand-shake state detection and error compensation in the mobile optical image stabilization(OIS) motion detector. Since the gyro sensor output of the OIS motion detector includes inherent error signals, accurate error correction is required for prompt hand-shake error compensation and stable hand-shake state detection. In this research with a little computation overhead of fuzzy-based algorithm, the hand-shake error compensation could be improved by quickly reducing the angle and phase error for the hand-shake frequencies. Further, stability of the OIS system could be enhanced by the hand-shake states of {Halt, Little vibrate, Big vibrate, Pan/Tilt}, classified by subdividing the hand-shake angle. The performance and stability of the proposed algorithm in OIS motion detector is quantitatively and qualitatively evaluated with the emulated hand-shaking of ${\pm}0.5^{\circ}$, ${\pm}0.8^{\circ}$ vibration and 2~12Hz frequency. In experiments, the average error compensation gain of 3.71dB is achieved with respect to the conventional BACF/DCF algorithm; and the four hand-shake states are detected in a stable manner.

• The KIPS Transactions:PartB
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• v.15B no.1
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• pp.25-36
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• 2008

In this paper, we present a robust hand recognition approach to sudden illumination changes. The proposed approach constructs a background model with respect to hue and hue gradient in HSI color space and extracts a foreground hand region from an input image using the background subtraction method. Eighteen features are defined for a hand pose and multi-class SVM(Support Vector Machine) approach is applied to learn and classify hand poses based on eighteen features. The proposed approach robustly extracts the contour of a hand with variations in illumination by applying the hue gradient into the background subtraction. A hand pose is defined by two Eigen values which are normalized by the size of OBB(Object-Oriented Bounding Box), and sixteen feature values which represent the number of hand contour points included in each subrange of OBB. We compared the RGB-based background subtraction, hue-based background subtraction and the proposed approach with sudden illumination changes and proved the robustness of the proposed approach. In the experiment, we built a hand pose training model from 2,700 sample hand images of six subjects which represent nine numerical numbers from one to nine. Our implementation result shows 92.6% of successful recognition rate for 1,620 hand images with various lighting condition using the training model.

• Proceedings of the Korean Ceranic Society Conference
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• 2003.04a
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• pp.79.2-79
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• 2003

• Digital Contents
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• no.1 s.128
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• pp.140-141
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• 2004

‘벼락공부’로 지난 10년 인터넷 인프라에 전력투구한 수험생을 연상시키는 우리나라의 손에 쥐어진 정보화 사회의 비전은 과연 무엇일까. ‘부끄러운 자화상’일까, 정보강국의 장밋빛 미래일까. 최근 고학력실업이 사회문제로 대두되고 있다. 이론 중심의 대학교육과 실무형 전문인재를 원하는 기업의 시각차가 크기 때문이다. 이제 대학교육도 바뀌어야 한다. 실습위주의 교과과정 편성으로 새로운 도전에 나선 경원대학교를 찾아봤다.

• Proceedings of the Korean Institute of Industrial Safety Conference
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• 2001.11a
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• pp.248-252
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• 2001

재활용자재라는 의미는 너무나 광범위한 것으로 본 논문에서는 실험에 적용된 음료캔, 등 산업현장에서 크게 이슈로 부각되어 환경적, 산업적으로 문제된 폐기물을 재활용 차원에서 제작자수거 부담 책임제가 된 음료캔 주요재료의 두 가지를 실험하여 비교하고 있다. 음료캔은 압착하여 제철공장에 납품하거나, 5∼10mm크기로 파쇄하여 여러용도로 사용되기도 한다.(중략)

• Journal of the Institute of Electronics Engineers of Korea SC
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• v.40 no.4
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• pp.225-234
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• 2003

Turbo compressors need high speed rotating impeller in structure, high rate gearbox and conventional induction motor. This mechanical system increased moment of inertia and mechanical friction loss. Recently turbo compressor has adopted a super high-speed motor and driver and have made its size smaller and mechanical friction loss at minimum. In this paper, variable super high - speed motor controller, compressor controller and MMI controller are implemented with only one DSP (TMS320VC33) chip for a 150HP, 70,000rpm direct drive turbo compressor. It was required hardware and software integration. The result of integration, Controller hardware became simple and all control software are developed same developing tool. The implements turbo compressor meets the requirements.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.6 no.6
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• pp.879-884
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• 2002

There are screw, reciprocating and turbo compressor by structure in an air compressor, essential equipment on he industrial spot. Resently it is wide that the range of turbo compressor's use in gradual, turbo compressor needs high speed rotation of impeller in structure, high rated gearbox and conventional induction motor. This mechanical system increased the moment of inertia and mechanical friction loss. Resently the study of turbo compressor applied super high speed motor and drive, removing gearbox made its size small and mechanical friction loss minimum. In this study we tried to develope variable super high speed motor drive systems for 150Hp, 70,000rpm drect drive Turbo compressor. The result of study is applied to a 150Hp direct turbo compressor and makes it goods.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.6 no.6
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• pp.885-890
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• 2002

Turbo compressor needs high speed rotation of impeller in structure, high rated gearbox and conventional induction motor. This mechanical system increased the moment of inertia and mechanical friction loss. Resently the study of turbo compressor applied super high speed motor and drive, removing gearbox made its size small and mechanical friction loss minimum. In this study we tried to develope variable super high speed motor controller, compressor controller and MMI controller under one DSP based systems for 1500Hp, 70,000rpm direct drive Turbo compressor. It have to do unitification of each controller"s hardware and software. The result of study is applied to a 150Hp direct turbo compressor and makes it goods.oods.