• 한국공작기계학회논문집
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• 제15권6호
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• pp.64-70
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• 2006

The optical element was usually used in optical devices and optical transfer devices, but it has been recently used in communication, computer and medical equipment. With the development of very high speed optical-communication, the development of the kernel parts of optical communication has also increased. Presently, the alignment of the optical element is time consuming, and an effective alignment algorithm has not yet to be developed. In this paper, the alignment automation of the optical element is studied. The ultra precision stage is applied to an optical element alignment to improve the accuracy of the alignment. The automation program of the optical element alignment is developed by LabVIEW programming to save the alignment time. The alignment algorithms of the optical element consist of field search and peak search algorithms.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2000년도 ITC-CSCC -1
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• pp.163-166
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• 2000

The design, numerical simulation, and an experimental implementation of two-element cross-shaped microstrip line-fed printed slot array antenna for IMT-2000 at the 2.0 GHz band is presented in this paper. The proposed antenna with relative permittivity 4.3 and thickness 1.0mm is analyzed by the Finite-Difference Time-Domain (FDTD) method. It was shown that the measured 2.0 VSWR bandwidth of one-element microstrip slot antenna is from 1.42 GHz to 2.69 GHz, which is approximately 61.8% and that of two-element microstrip slot array antenna is from 1.42 GHz to 2.56 GHz, which is approximately 57.3% And it was shown that the measured gain of one-element microstrip slot antenna is 2.75 dBi and that of two-element microstrip slot antenna is 4.75 dEi. The antennas were fabricated and tested. The measured results are in good agreements with the FDTD results.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2005년도 ICCAS
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• pp.510-513
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• 2005

Due to the asymptotic property, deadbeat control can hardly be applied to the continuous time system control. But some delay element method can deal such a problem. Besides delay element method, well-known digital deadbeat control can be used by the aid of some smoothing elements. In this paper, 2nd order smoothing element is used for the smoothing of the digital deadbeat controller. And this element is argumented to the plant, and so control problem is to control the argumented system digitally. We simulated this control system using Matlab language and finally apply this algorithm to the rotary inverted pendulum system.

• 대한의용생체공학회:학술대회논문집
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• 대한의용생체공학회 1998년도 추계학술대회
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• pp.219-220
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• 1998

Although a single-element synthetic aperture system can produce high-resolution beam profile, it is not a highly practical system because of its low signal to noise ratio against conventional system's. A multi-element synthetic aperture processing has been proposed with defocusing in this paper. A multi element subaperture defocused to emulate a single element spatial response with high acoustic power. The results have higher signal to noise and better contrast resolution than conventional synthetic aperture method.

• 전자공학회논문지CI
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• 제39권6호
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• pp.24-35
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• 2002

Maxwell 방정식을 효율적으로 풀기 위해 웨이브렛 행렬 변환(wavelet matrix transformation)과 경계요소법(Boundary Element Method)을 결합하는 방법을 제안하였으며, 2차원 위상변이 마스크(phase- shifting mask) 문제에 적용하였다. 계산 결과를 해석적인 해 및 참고문헌의 결과와 비교함으로써 구현된 모듈의 정확도를 검증하였으며, 제안된 방법이 경계요소법만을 적용한 경우에 비해 연산 시간과 메모리 사용 측면에서 효율적임을 확인하였다.

• 디지털융복합연구
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• 제13권1호
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• pp.463-468
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• 2015

모바일 플랫폼시장이 확산함에 따라 홈화면의 확보는 기업의 브랜드커뮤니케이션 활동에 있어서 중요한 의미로 받아들여지고 있다. 이에 본 연구는 디바이스 브랜드별 UI차별화를 위해 기본으로 탑재했던 런처의 기본 기능을 넘어서 브랜드 커뮤니케이션 기능을 수행하는 어플리케이션의 확대된 기능으로 변화될 수 있는 특징적 요소를 도출함으로써 스마트폰 어플리케이션으로서의 런처가 브랜드커뮤니케이션으로 어떻게 활용되어지는지를 연구하였다. 런처 구성요소를 속성에 따라 홈구성요소와 개인화기능요소로 구분하여 각 상세 항목에서 나타나는 브랜드 커뮤니케이션의 항목과 특징을 분석한 결과 (1)브랜드 이미지 통합적 요소 (2)서비스마케팅 몰입적 요소로 도출 되었다.

• Human Ecology Research
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• 제52권1호
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• pp.11-19
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• 2014

The purpose of this study was to analyze the effect of perceived parental neglect and abuse and peer attachment on school life adjustment according to children's gender. A total of 2,264 5th graders from the second Korea Child-Adolescent Panel Survey participated. The results were as follows: First, the boys had higher parental neglect and abuse scores than the girls, while the girls had higher peer attachment scores and higher school life adjustment scores than the boys. Second, every sub-element of school life adjustment was significantly negatively correlated with parental neglect and abuse regardless of the children's gender. Every sub-element of school life adjustment was significantly positively correlated with the 'communication' and 'trust' sub-elements of peer attachment regardless of the children's gender. In the case of the boys, the 'study activity' and 'peer relation' sub-elements of school life adjustment were significantly negatively correlated with the 'alienation' sub-element of peer attachment. For the girls, every sub-element of school life adjustment was significantly negatively correlated with the alienation sub-element of peer attachment. Finally, the factors of 'parental neglect and abuse', and the peer attachment sub-elements of 'communication', and 'trust' significantly predicted the boys' school life adjustment, while for girls, the significant predictors were 'parental neglect and abuse', 'communication', 'trust', and 'alienation'.

• 디지털융복합연구
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• 제12권12호
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• pp.243-248
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• 2014

본 논문에서는 사람 얼굴의 표정을 인식하기 위하여 판단 요소를 선정하고 판단 요소의 변화 상태를 파악하여 표정을 인식하는 방법을 제안한다. 판단 요소를 선정하기 위하여 이미지 영역 분할 방법을 사용하며, 판단 요소의 변화율을 이용하여 표정을 판단한다. 표정을 판단하기 위하여 90명의 표정을 데이터베이스화하여 비교하였고, 4개의 표정(웃음, 화남, 짜증, 슬픔)을 인식하는 방법을 제안한다. 제안한 방법은 시뮬레이션을 실시하여 판단 요소 검출 성공률과 표정 인식률을 통해 검증한다.

• 가정과삶의질연구
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• 제26권4호
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• pp.149-162
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• 2008

The purpose of this study is to provide a meaningful thought to professionals and administrators of Korea working for Consumer General Education development at their Universities. Also, tips for organizing and meaning Consumer General Education Curriculum effectively are provided. Finally, the study suggests essential elements to improve qualities of Consumer General Education in Korea Universities. This study's method are content analysis through web site and survey. The subjects of this survey were 257 students. The data were collected by qusetionaires developed by researcher and analyzed by frequencies, correlation Analysis, One Way Anova, Duncan Test, Factor Analysis, Multiple Regression Analysis. The major findings were as follows: University students's satisfaction level about General Education was low and the needs level about Consumer General Education was high. And the education service quality showed factors to be administrative service element, professor service element, classroom environment element, communication element. And Multiple Regression Analysis on each of the education service quality factors had been significant effects for find out the differences in the degree of satisfaction.

• Journal of Electrical Engineering and Technology
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• 제9권2호
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• pp.682-685
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• 2014

In this paper, we presented the window applicable blind-type frequency selective surface to control the coverage area of wireless communication in secure building or conference room. The proposed frequency selective structure has the reconfigurable frequency range depends on its blind rotation angle. To verify the proposed structure, we fabricated the window blind-type frequency selective surface with four-legged loaded element and ring-type element as a unit cell and performed measurements of the transmission characteristics for different blind rotation angles to prove the feasibility. The measurement results show good agreements with the simulation results. One of the advantages is that the proposed structure does not need to have a bias circuit, so it is very easy to implement at low cost and also can be applied to any planar surface for wireless security applications.