• The Transactions of the Korean Institute of Power Electronics
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• v.6 no.1
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• pp.13-20
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• 2001

In this appear, we proposed the new current mirror has large output resistance and excellent current matching characteristics. If supply voltage were lowered under the conventional CMOS operational amplifier, the wing of out put power could be restricted. So, the paper suggests a new way of differential operational amplifier circuit to solve the problem. The paper proposes that a new current mirror increases output swing and has a stable operation. We compare and verify characteristics of the proposed current mirror with the cascoded current mirror and the regulated current mirror through simulation.

• Proceedings of the Korea Information Processing Society Conference
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• 2019.10a
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• pp.1062-1064
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• 2019

개인 동호회 및 선수 사람들이 라켓스포츠를 하고 있지만 실력 향상에는 어려움을 가지고 있다. 현재 라켓스포츠에서 단지 스윙 연습정도만 지원하는 것이 현실이다. 본 연구에서는 저비용 3~9축 다축센서와 개인 스마트폰의 블루투스 연동을 이용한 가상운동 훈련 솔루션을 개발하기 위한 스윙 정확도 측정 방법을 연구한다.

• Journal of Bio-Environment Control
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• v.20 no.3
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• pp.204-210
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• 2011

This experiment was conducted to investigate the effect of water states (water, osmotic potential and turgor pressure) of fruit vesicle and leaf on soluble solids and organic acid contents of fruits of 'Shiranuhi' mandarin hybrid, M16 A line during the fruit maturing season in plastic house cultivation. The 'Shirauhi' grafted on 'Swingle citrumelo', strong strength of rootstock, produced fruit with lower soluble solids and organic acid content than 'Trifoliate' orange rootstock. The fruits vesicle water potential and turgor pressure measured before dawn in 'Swingle citrumelo' were higher tendency than the 'Trifoliate' orange, but osmotic potential values were lower than the 'Trifoliate' orange. The changes of leaf water potential were very similar to the fruit. The results suggest that in the 'Shirauhi' fruits grafted on two rootstocks changes of soluble solids and organic acid content of the fruit were influenced by the leaf water potential and the osmotic potential of the fruit vesicles, which might be caused by the difference of root distribution between two rootstocks.

• Korean Journal of Applied Biomechanics
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• v.19 no.1
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• pp.167-177
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• 2009

The purpose of this study was to investigate effect of golf shoe design on kinematic variables during golf swing. Five professional male golfers with shoe size 270mm were recruited for the study. Swing motion was collected using 8 high speed camera motion analysis at a sampling of 180Hz. Kinematic variables were calculated by EVaRT 4.2 software. Driver swing was divided into four events; El(adress), E2(top), E3(impact) and E4(finish). Time, peak velocity, velocity of center of mass, velocity of the foot and ankle angle during Phase 1(El-E2), Phase 2(E2-E3), and Phase 3(E3-E4) were analyzed in order to investigate the relationship between golf shoe design and swing performance. The findings indicated that type C golf shoes would be beneficial for stability and control of movement during address and swing performance. Furthermore, faster speed of golf shoes, center of mass, and both feet were observed with Type C golf shoes. It is expected that golfers with Type C golf Shoes provide greater force as they control the center of mass faster and increase rotational force during impact compared to other golf shoes.

• Journal of the Korean Applied Science and Technology
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• v.38 no.2
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• pp.532-542
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• 2021

The purpose of this study was to investigate the body's strategy through kinematic variables of the lower extremities and ground reaction forces to maintain the club-head speed and ball accuracy despite the three stances during the golf swing. Ten male golfers who official handicap two were participate in the experiment. All subjects performed swing after maintaining the address posture according to stance conditions(square; SS, open: OS, closed: CS). Using a 3D motion analysis system and force plateform, the results were calculated with the 7-iron full swing each stance. In result, there was no difference in center of displacement, and left and right hip and knee joint angle displacement. Left ankle joint was largely plantar-flexed in OS, and right ankle joint was largely performed in CS from the address to the downswing. From address to take-back, right foot had a large left direction and the left foot had a right direction were greater in OS than in CS. Therefore, despite various stances, maintaining the same posture at impact is thought to have a positive effect on club head speed and ball direction.

• Proceedings of the KSME Conference
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• 2005.11a
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• pp.194.2-194.2
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• 2005

• Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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• 2003.07a
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• pp.99-103
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• 2003

Introduction SWING and progress of research activities. Then I will explain about Anti-Virus research concretely. It will deal with Computer Virus infection route, Computer Virus diagnostic methods, exsisting Anti-Virus Engine operation principle, performming research activities and future research course.

• Proceedings of the Optical Society of Korea Conference
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• 2001.02a
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• pp.180-181
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• 2001

이 논문은 채널당 1Gbps로 동작하는 10채널 광 수신기를 0.25$mu extrm{m}$ CMOS공정을 이용하여 설계한 것이다. 광 수신기는 크게 2부분으로 나눠지는데 첫 번째 부분은 입력된 전류 신호를 전압 신호로 변환시켜주는 역할을 하는 트랜스임피던스 전치증폭기이고, 다음 부분은 원하는 디지털 레벨로 풀스윙 할 수 있도록 하는 후치증폭기이다. 전치증폭기의 출력 전압은 스윙폭에 무관하게 그 다음 단에서 적당한 디지털 레벨 데이터로 변환되어야한다. (중략)

• Proceedings of the Korea Contents Association Conference
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• 2018.05a
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• pp.97-98
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• 2018

재즈 연주자들이 음반에 많이 녹음한 재즈 스탠더드 곡을 대상으로 레퍼토리의 장르를 분류하여 선정한 곡을 중심으로 다른 버전의 편곡 특성을 연구한다. 레퍼토리 곡은 재즈 스탠더드 원곡에서 블루스, 스윙, 발라드, 비밥, 라틴의 5가지 장르로 분류되며, 대부분 발라드와 스윙이다. 레퍼토리의 곡 분류를 통해 같은 곡이 다른 버전에서 어떻게 다르게 연주되었는지 보기위해 여성 재즈보컬들에 의해 녹음된 음반을 중심으로 각 버전의 특징을 분석한다. 이 연구를 수행하여 각 여성 재즈 보컬들의 녹음된 곡에서 다른 버전의 편곡 특성을 도출한다.

• Journal of the Institute of Electronics and Information Engineers
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• v.51 no.4
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• pp.49-58
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• 2014

A low-swing differential near-ground signaling (NGS) transceiver for low-power high-speed mobile I/O interface is presented. The proposed transmitter adopts an on-chip regulated programmable-swing voltage-mode driver and a pre-driver with asymmetric rising/falling time. The proposed receiver utilizes a new multiple gain-path differential amplifier with feed-forward capacitors that boost high-frequency gain. Also, the receiver incorporates a new adaptive bias generator to compensate the input common-mode variation due to the variable output swing of the transmitter and to minimize the current mismatch of the receiver's input stage amplifier. The use of the new simple and effective impedance matching techniques applied in the transmitter and receiver results in good signal integrity and high power efficiency. The proposed transceiver designed in a 65-nm CMOS technology achieves a data rate of 13 Gbps/channel and 0.3 pJ/bit (= 0.3 mW/Gbps) high power efficiency over a 10 cm FR4 printed circuit board.