• 한국진공학회:학술대회논문집
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• 한국진공학회 2016년도 제50회 동계 정기학술대회 초록집
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• pp.345.2-345.2
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• 2016

Alumina (Al2O3) doped zinc oxide (ZnO) films (AZO) have been prepared from 2 wt.% Al2O3 doped ZnO target by DC magnetron sputtering at a 2 mTorr (0.27 Pa) chamber pressure in (15 sccm) argon ambient. We obtained films of various opto-electronic properties by variation of target angle from 32.5o to 72.5o. At lower target angle deposited films show higher values in optical gap, mobility of charge carrier, carrier concentration, crystallite grain size, transmission range of wavelength, which are favorable characteristics of AZO as a transparent conducting oxide (TCO). At higher target angle the sheet resistance, work function, surface roughness for the AZO films increases. Measured haze ratio of the films changed lower to higher and size of characteristic surface structure of as deposited film ranges from ~40 nm to ~300 nm. By a combination of low and high target angle we obtained a textured TCO film with high conductivity.

• Journal of Information Display
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• 제7권1호
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• pp.12-18
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• 2006

We investigated the horizontal alignment properties such as surface morphology, pretilt angle, and polar and azimuthal anchoring energy of organic alignment material-coated surface treated by ion beam. In this investigation the energy and incident angle of ion beam were changed. We also fabricated an in-plane switching (IPS) cell by ion beam alignment. The results showed similar voltage-transmittance characteristics to those of a rubbed cell and better dark state.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1996년도 추계학술대회 논문집 학회본부
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• pp.442-444
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• 1996

This paper presents a new image rectification method using stereo image pairs to synthesize arbitrary viewing images. The image rectification is a preprocessing procedure that generates a vertically aligned images and makes epipolar lines collinear. The proposed rectification method has more robustness by considering the real situations such as the mismatch of pan angle, tilt angle and vertical shifting of cameras than previous method[5] which considers only pan angle. We evaluate the proposed method by comparison with previous method using synthesized images.

• Journal of the Korean Data and Information Science Society
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• 제20권2호
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• pp.339-348
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• 2009

자동 굴곡-신연기법이 만성요통 환자의 요천추 각, 요추만곡, 요추 5번 추간판 각, 그리고 통증에 미치는 영향에 대하여 연구하였다. 만성요통 환자 30명을 대상으로 실험군과 대조군의 두 그룹으로 나누어 실험 전과 후의 요천추 각, 요추만곡, 요추 5번 추간판 각, 그리고 통증을 측정 하였다. 실험군은 온습포, 간섭파, 초음파, 그리고 자동 굴곡-신연기법을 적용하였으며, 대조군은 온습포, 간섭파, 초음파, 그리고 스트레칭운동을 적용하였다. 실험전과 후를 비교해 보면 대조군과 실험군 둘 다 처리효과가 있음을 알 수 있다. 또한 실험군의 굴곡-신연기법적용이 대조군에서의 스트레칭운동보다 효과가 월등히 좋다는 것을 알 수 있다.

• Journal of Information Display
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• 제10권1호
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• pp.19-23
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• 2009

In this paper, we review the proposed liquid crystal display (LCD) with a tunable viewing angle consisting of a conventional liquid crystal display (LCD) panel and a thermally variable retardation layer (TVRL) characterized by uniformly aligned LC film with transparent indium-tin-oxide electrodes for Joule heating. In the TVRL, nematic phase is transitioned into isotropic by Joule heating. The numerical calculation showed that the intrinsic wide viewing angle was achieved at the isotropic phase of the TVRL by Joule heating, whereas the narrow viewing angle was obtained at the nematic phase of the TVRL. The simulated and experimental results of the proposed LCD show continuous and symmetrical viewing angle characteristics by tuning the retardation of TVRL using Joule heating. The structure of the viewing angle control proposed here is adoptable to all LCD modes with wide viewing angle characteristics.

• 한국자동차공학회논문집
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• 제18권2호
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• pp.48-55
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• 2010

We have development the steering angle sensor using not only detecting parts but also integrating technique with semiconductors for automobile applications. The performance design and analysis of the steering angle sensor for intelligent vehicles is complicated due to variety of parameters. In this study, the performance characteristics of the angle sensor were analyzed using test rig. By means of magnetic induction technique, these new the steering angle sensors showed excellent magnetic characteristics. The detection range of steering angle sensor obtained was ${\pm}800^{\circ}$, the maximum non-linearity is 0.744% Full Span and the temperature range was $-40^{\circ}C{\sim}+125^{\circ}C$. With this conclusive, the inductive angle sensor was quite satisfactory for many applications in intelligent vehicles.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제12권12호
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• pp.5860-5876
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• 2018

A single snapshot data can only provide limited amount of information so that the rank of covariance matrix is not full, which is not adopted to complete the parameter estimation directly using the traditional super-resolution method. Aiming at solving the problem, a joint time delay and angle estimation using matrix pencil method based on information reconstruction vector for orthogonal frequency division multiplexing (OFDM) signal is proposed. Firstly, according to the channel frequency response vector of each array element, the algorithm reconstructs the vector data with delay and angle parameter information from both frequency and space dimensions. Then the enhanced data matrix for the extended array element is constructed, and the parameter vector of time delay and angle is estimated by the two-dimensional matrix pencil (2D MP) algorithm. Finally, the joint estimation of two-dimensional parameters is accomplished by the parameter pairing. The algorithm does not need a pseudo-spectral peak search, and the location of the target can be determined only by a single receiver, which can reduce the overhead of the positioning system. The theoretical analysis and simulation results show that the estimation accuracy of the proposed method in a single snapshot and low signal-to-noise ratio environment is much higher than that of Root Multiple Signal Classification algorithm (Root-MUSIC), and this method also achieves the higher estimation performance and efficiency with lower complexity cost compared to the one-dimensional matrix pencil algorithm.

• 한국정보통신학회논문지
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• 제13권11호
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• pp.2289-2294
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• 2009

이 논문에서는 라인 트레이스 차량의 주행 제어를 위한 퍼지 제어기를 설계하였다. 라인을 감지하는 센서들의 감지 상태에 따라 센서값을 산출하고 이 센서값은 조향각 제어 퍼지 추론 규칙의 입력으로 사용되어 조향각을 제어값으로 산출한다. 또한 산출된 조향각은 다시 모터속력 제어 추론 퍼지 규칙의 입력으로 사용되어 주행 속도 결정을 위한 모터속력을 제어값으로 산출하게 된다. 제안한 퍼지 제어 기법을 이용하여 조향각만을 제어한 경우와 조향각과 모터속력을 함께 제어한 경우를 각각 실험한 결과, 모터속력을 함께 제어한 경우가 트랙을 이탈하지 않으면서 더욱 빠르게 주행하여 제안한 기법에 더욱 효과적임을 알 수 있었다.

• 디지털산업정보학회논문지
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• 제7권2호
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• pp.91-100
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• 2011

Free viewpoint TV can provide multi-angle view point images for viewer needs. In the real world, But all angle view point images can not be captured by camera. Only a few any angle view point images are captured by each camera. Group of the captured images is called multi-view image. Therefore free viewpoint TV wants to production of virtual sub angle view point images form captured any angle view point images. Interpolation methods are known of this problem general solution. To product interpolated view point image of correct angle need to depth image of multi-view image. Unfortunately, multi-view video including depth image is necessary to develop a new compression encoding technique for storage and transmission because of a huge amount of data. Layered depth image is an efficient representation method of multi-view video data. This method makes a data structure that is synthesis of multi-view color and depth image. This paper proposed enhanced compression method using layered depth image representation and H.264/AVC video coding technology. In experimental results, confirmed high compression performance and good quality reconstructed image.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2018년도 추계학술대회
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• pp.452-455
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• 2018

휠로더는 붐과 버켓을 제어하여 굴삭 및 덤핑 작업을 수행한다. 휠로더 장비 운전은 반복 작업이 많고, 작업환경이 열악하지만 오직 사람에 의한 수작업으로 진행되고 있다. 최근 전장품에서도 무인 자동화 시스템을 적용하려는 요구가 점차 증가하고 있다. 휠로더의 자동화 시스템은 안정된 제어를 위해 정확한 각도 검출을 검출이 필수적이다. 본 논문은 노이즈에 강인 하면서 정밀 각도 제어를 위한 신호처리시스템을 제안한다. 제안 시스템을 구현하여 휠로더 붐각도 시스템에 적용한 결과 약 0.1도 각도 변화 검출이 가능하였다.