• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2009년도 추계학술대회 논문집
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• pp.451-452
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• 2009

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2010년도 추계학술대회 논문집
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• pp.771-772
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• 2010

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2003년도 ICCAS
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• pp.2072-2077
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• 2003

Animal-like robots are serving an important role as a linkage between biology and engineering. So, in this paper, we aim to develop a biomimetic microrobot that mimics the locomotion mechanism of a gastropod. This microrobot has 3 DOF (x, y translation and rotation), and has small size, unlimited traveling range, high resolution and low cost. Its movement can be made using propagation wave that is generated by the controllable sinusoidal voltage source and piezoelectric effects. This soft motion that can be generated by propagation wave and piezoelectric mechanism would be useful for the motion on the slippery surface. So we modeled the propagation wave mechanism including piezoelectric effect and friction on the contact surface, and could know the velocity of the microrobot is dependent on the driving frequency, input voltage peak, propagation wavelength and surface friction coefficient. With these results we design the microrobot, and accomplish its fabrication and experimentation. The development of this microrobot shall be aimed to design an autonomous moving actuator like animal. Also it can be used from micromanipulation system technology to biology and medicine.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2005년도 춘계학술대회논문집
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• pp.360-363
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• 2005

Biomimetic actuators composed of cellophane with an electrically conducting polyaniline(PANI) film have been fabricated and tested in air ambience conditions doped with two different counter ions such as perchlorate (${ClO_4}^-$) and tetrafluoroborate (${BF_4}^-$). Fabrication of the trilayer CP//CELLOPHANE//CP substantially enhanced the tip displacement (13.2mm) compared to the small displacement (8.3mm) of the bilaye. CP//CELLOPHANE. The ion migration among layers is the main factor behind the expansion of cellophane, while the expansion/contraction of PANI are dependent on the redox reaction of the polymer. The displacement of the composite is dominated by the humidity content. This implies that the actuation principle is possibly due to the assistance of water existing.

• 제어로봇시스템학회논문지
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• 제18권3호
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• pp.188-192
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• 2012

In this study, a carbon nanotube (CNT) flexible strain sensor was fabricated with CNT based epoxy and rubber composites for tactile sensing. The flexible strain sensor can be fabricated as a long fibrous sensor and it also may be able to measure large deformation and contact information on a structure. The long and flexible sensor can be considered to be a continuous sensor like a dendrite of a neuron in the human body and we named the sensor as a biomimetic artificial neuron. For the application of the neuron in biomimetic engineering, an ANMS (Artificial Neuron Matrix System) was developed by means of the array of the neurons with a signal processing system. Moreover, a strain positioning algorithm was also developed to find localized tactile information of the ANMS with Labview for the application of an artificial e-skin.

• 폴리머
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• 제37권5호
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• pp.625-631
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• 2013

점막접착 기능은 인체의 다양한 장기에 적용되는 의료용 접착제에 요구되는 중요한 특성이며, 점막접착 기능을 갖는 고분자를 개발하기 위하여 많은 연구가 이루어지고 있다. 최근 많은 연구자들이 생체모방 기술을 통한 점막접착형 고분자를 개발하고 있고, 그 중 해양 부착 생물인 홍합의 접착 기능 및 특성이 접착제 연구의 주요 대상이 되어왔다. 본 연구에서는 홍합 접착 물질 속에 과량 존재해 표면 접착 기능을 발현하는 카테콜 구조가 도입된 생체모방형 고분자를 합성하였고, 핵자기공명분광법 및 젤투과크로마토그래피를 사용하여 분석하였다. In vitro 상에서 돼지의 소장점막하조직 sheet를 준비하여 전단 시편을 제작하고 점막접착력을 측정하였다. 점막접착형 고분자는 현재 상업적으로 사용되고 있는 대조군인 피브린글루와 비교할 때 월등한 접착력을 보였다. 또한, 다양한 인자를 변화시키며 최적의 점막접착력을 나타내는 조건을 확립하였다. 이러한 결과들을 토대로 우수한 점막접착형 특성을 나타내는 고분자를 개발하였고 다양한 임상적용 및 의료용 기기에 도입가능한 소재의 기초연구를 수행하였다고 사료된다.

• International Journal of Railway
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• 제4권3호
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• pp.74-79
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• 2011

Recent years have witnessed speed up of moving vehicles such as high-speed of trains. Increase in speed entails concomitant increase in turbulent air flow which contributes toward increased aerodynamic noise. The proposed method for aerodynamic noise reduction is based on a biomimetic design of owl feather. The five morphological parameters of the owl feather are extracted from close observation, and simulation cases are constructed by applying design of experiments methodology. Swirling strength for each case is obtained through steady-state CFD analysis, and key morphological parameters that affect the turbulence are identified. Large eddy simulations (LES) are then performed on selected cases to predict the air turbulence. Different cases show varying vortex distributions which are expected to lead to varying aerodynamic noise levels.

• 한국고분자학회지:고분자과학과기술
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• 제22권5호
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• pp.460-466
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• 2011

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2012년도 춘계학술대회 논문집
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• pp.493-494
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• 2012

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2013년도 춘계학술대회 논문집
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• pp.885-886
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• 2013