• 한국동물학회:학술대회논문집
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• 한국동물학회 2001년도 한국생물과학협회 학술발표대회
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• pp.203.1-203
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• 2001

No Abstract, See Full Text

• 한국동물학회:학술대회논문집
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• 한국동물학회 2000년도 한국생물과학협회 학술발표대회
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• pp.168.2-168
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• 2000

No Abstract, See Full Text

• 한국동물학회:학술대회논문집
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• 한국동물학회 1997년도 한국생물과학협회 학술발표대회
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• pp.285.1-285
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• 1997

No Abstract, See Full Text

• 한국동물학회:학술대회논문집
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• 한국동물학회 1999년도 한국생물과학협회 학술발표대회
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• pp.32-32
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• 1999

No Abstract, See Full Text

• Journal of Electrical Engineering and Technology
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• 제10권4호
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• pp.1692-1699
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• 2015

This paper presents an analysis of the mechanism of failure modes in bi-directional phase-shift full-bridge converters, composed of MOSFET, based on the circuit operation and parasitic parameters of MOSFET. In addition, the relation between circuit operation and parameters is suggested through an experimental comparison. From this relation, the suitable ranges of parameters for stable performance are analyzed. The design criteria of the bi-directional phase-shift full-bridge converter are presented and evaluated from the experimental verification.

• JSTS:Journal of Semiconductor Technology and Science
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• 제13권4호
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• pp.361-366
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• 2013

A full-range analytic drain current model for depletion-mode long-channel surrounding-gate nanowire field-effect transistor (SGNWFET) is proposed. The model is derived from the solution of the 1-D cylindrical Poisson equation which includes dopant and mobile charges, by using the Pao-Sah gradual channel approximation and the full-depletion approximation. The proposed model captures the phenomenon of the bulk conduction mechanism in all regions of device operation (subthreshold, linear, and saturation regions). It has been shown that the continuous model is in complete agreement with the numerical simulations.

• 한국공작기계학회논문집
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• 제17권5호
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• pp.82-88
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• 2008

Conventional aspherical lens polishing methods by the small tool polishing use aspherical profile and the trajectory of the polishing tool is also controlled. In this paper, new full contact polishing mechanism is suggested to polish aspherical glass lens mold by both airbag polishing tool and eccentric motion. Full contact concept by airbag polishing tool and no position control make the easy polishing setup and do not need aspherical design profile. An aspherical lens polishing machine was made for this study and a verification experiment was performed for surface roughness improvements.

• 한국산학기술학회논문지
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• 제21권3호
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• pp.65-72
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• 2020

얼음을 제공하는 기능이 구비된 냉장고는 대부분 냉장고 내부의 얼음 저장소에 미리 얼음을 채워 두고 사용자가 필요할 때 많은 양의 얼음을 취출할 수 있도록 하고 있다. 그러나 냉장고의 얼음 저장소에 얼음이 채워진 상태로 냉장고가 장기간 사용되지 않거나 정상적인 동작 중에도 시간이 경과하면 얼음이 서로 엉기는 현상이 발생한다. 이렇게 엉긴 얼음 덩어리를 분리시키는 메커니즘이 구비되어 있으나 얼음 엉김 현상이 심할 경우 얼음이 완전히 취출되지 못하는 문제가 있다. 본 연구에서는 이러한 문제를 해결하기 위해 얼음이 엉기는 과정과 얼음의 분리력에 관한 기존의 연구를 조사하였고, 인위적으로 얼음을 엉기게 하여 다양한 조건에서 얼음의 취출 정도를 실험하였다. 이 과정에서 얼음의 취출을 방해하는 기존 얼음 저장소 형상의 문제점에 착안하여 이를 개선하기 위한 형상과, 완전 취출을 위해 얼음 분쇄 메커니즘의 작동 반경을 넓히는 새로운 메커니즘을 제안하였다. 제안된 메커니즘의 시제품을 제작하고 실제 냉장고에 적용하여 얼음이 완전 취출됨을 검증하였다. 그 결과 기존 얼음 저장소의 형상과 분쇄 메커니즘에서 얼음 취출률이 65%정도이었으나, 제안된 형상과 메커니즘에서는 완전히 추출되었다.

• 한국반도체및디스플레이장비학회:학술대회논문집
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• 한국반도체및디스플레이장비학회 2004년도 춘계학술대회 발표 논문집
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• pp.154-158
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• 2004

Power inductor is usually used in the field of the power circuit of a cellular phone, TFT LCD module etc.. This paper presents the development process of Power Inductor Full Automation Winding/Welding System for TFT LCD. This process, the process algorithm, high precision welding current control, design of welding head, high speed, high precision feeding mechanism, and user interface process control program technologies are included.

• 산업경영시스템학회지
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• 제34권4호
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• pp.66-71
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• 2011

This article proposes a novel shift automation mechanism for an automated manual transmission (AMT). The development of an automated manual transmission is currently being paid considerable attention by vehicle manufacturers, with the prospects of combining the comfort of an automatic transmission and the high efficiency of a manual transmission. In order to automate the shift mechanism of a manual transmission, the proposed shift automation mechanism consists of two electric motors, cross shaped pinion gears, rack type shift rails, and a ball splined hollow shaft. First we describe the shift mechanism and operating principles of a manual transmission to investigate important design criteria for the shift automation device. And a new shift automation mechanism is described with its structure, elements, and operating principles in detail. Using a conventional manual transmission, we develop a full three-dimensional CAD model of an AMT which includes main components of the manual transmission and the designed shift automation mechanism. Finally we investigate the operating performances and feasibility of the designed AMT by a dynamic analysis.