• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1990년도 한국자동제어학술회의논문집(국제학술편); KOEX, Seoul; 26-27 Oct. 1990
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• pp.917-922
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• 1990

Pattern classification is an essential step in automatic robotic assembly which joins together finite number of seperated industrial parts. In this paper, a fast and systematic algorithm for classifying occlusion-free objects is proposed, using the notion of incremental circle transform which describes the boundary contour of an object as a parametric vector function of incremental elements. With similarity transform and line integral, normalized determinant curve of an object classifies each object, independent of position, orientation, scaling of an object and cyclic shift of the stating point for the boundary description.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 심포지엄 논문집 정보 및 제어부문
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• pp.117-119
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• 2006

In this work, we suggest another method to localize DFT in spatial domain. This enables DFT algorithm to be used for local pattern matching. Once calculated, it costs same load to calculate localized DFT regardless of the size or the position of local region In spatial domain. We applied this method to face detection problem and got the results which prove the utility of our method.

• 대한전기학회논문지
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• 제41권8호
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• pp.947-950
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• 1992

At-cut quartz crystal has been applied as chemical vapour sensors. The responses of quartz crystal at 9 MHz coated with phosphatidylglycerol(PG), phosphatidylinositol(PI), phosphatidylethanolamine(PE), phosphatidylserine(PS), and lipid A(LA) are determined for amyl acetate, acetoin, menthone and other organic gases which showed different affinities for each lipid. The identification of odorants depending on the species of lipid used for coating is discussed in terms of the normalized resonant frequency shift pattern.

• 한국환경과학회지
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• 제23권1호
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• pp.25-37
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• 2014

In the present study, we analyzed precipitation patterns and diurnal variation trends of hourly precipitation intensity due to climate change. To that end, we used the hourly precipitation data obtained from 26 weather stations around South Korea, especially Busan, from 1970 to 2009. The results showed that the hourly precipitation was concentrated on a specific time of day. In particular, the results showed the so-called "morning shift" phenomenon, which is an increase in the frequency and intensity of hourly precipitation during the morning. The morning shift phenomenon was even more pronounced when a higher level of hourly precipitation intensity occurred throughout the day. Furthermore, in many regions of Korea, including Busan, this morning shift phenomenon became more prevalent as climate change progressed.

• 한국전자파학회논문지
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• 제18권3호
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• pp.273-281
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• 2007

이 논문은 900 MHz대역의 RFID 태그용 다이폴 안테나를 설계하여, 이 안테나가 부착되는 물체에 의한 안테나의 성능이 실험적으로 평가되었다. 전기적 특성이 다른 유전체, 자성체 및 도체에 다이폴 안테나를 부착하였을 때, 부착된 매질의 종류, 크기 및 높이의 변화에 따라 안테나의 반사계수와 방사 패턴이 변화되는 것을 실험적으로 평가하였다 안테나가 유전체의 표면에 부착되었을 때, 측정된 반사계수와 방사 패턴은 비유전율의 영향으로 인해 약 40 MHz의 공진 주파수 편이와 약 $1\sim3dB$ 정도의 감쇠를 보였다. 부착 지판의 크기에 의한 주파수 편이가 관측되었으나, 부착 지판을 가진 다이폴 안테나의 측정된 방사 패턴은 부착 지판이 없는 다이폴 안테나의 방사 패턴과 유사하였다. 부착 지판이 도체나 자성체인 경우, 다이폴 안테나와 부착 지판 사이의 거리에 의한 주파수 편이와 위상차 때문에, 910 MHz에서 약 5 dB 이상의 방사 패턴 진폭의 저하가 관측되었다.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2015년도 제49회 하계 정기학술대회 초록집
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• pp.167.1-167.1
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• 2015

We investigate the degradation pattern of Black phosphorus (BP) field effect transistor (FETs) was investigated by using an mechanically exfoliated BP that react O2 and water vapor in ambient condition, degradation. The BP FETs was electrically measured every 20 minutes (1cycle) in the air, the total cycle is 100. We show electrical changes with Mobility, On/off ratio, Current and a significant positive shift in the threshold voltage. We extracted the current level at Vgs-Vth = 0, -10, -20 and fitting with Swiss-cheese model. This model suggested that Swiss-cheese model is well fitted with degradation pattern of BP FETs.

• 한국전자파학회논문지
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• 제21권10호
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• pp.1161-1168
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• 2010

FHSS(Frequency Hopping Spread Spectrum) 방식은 군 통신 시스템에서 재밍(Jamming)에 의한 간섭을 줄이기 위해 사용된다. 하지만 사용되는 변조 방식의 종류, 재밍 신호의 특성에 따른 위성 통신 시스템의 BER 성능이 무선 채널 상태에 따라 어떤 성능 차이를 보이는지 분석되지 않았다. 따라서 본 논문에서는 PBNJ(Partial-Band Noise Jamming)와 WPBJ(Worst case Partial-Band noise Jamming)의 두 가지 재밍 환경에서 NC-MFSK(Non-Coherent M-ary Frequeency-Shift Keying), SDPSK(Symmetric Differential Phase-Shift Keying), GMSK (Gaussian filtered Minimum-Shift Keying)의 세 가지 변조 방식에 따른 위성 통신 시스템의 BER 성능 변화를 분석한다. 또한, 분석된 결과를 이용하여 전송 환경에 따른 최적의 전송 방식을 제안하도록 한다.

• Journal of the Optical Society of Korea
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• 제8권3호
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• pp.122-126
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• 2004

The method to obtain four speckle patterns with relative phase shift of ${\pi}/2$ by passive devices such as two waveplates and a linear polarizer, awl to calculate the phase at each point of the speckle pattern in shearography with a Wollaston prism is presented, and the feasibility of the proposed method is theoretically demonstrated by Jones vector.

• 한국잠사곤충학회지
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• 제39권2호
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• pp.169-173
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• 1997

The behavior of tyrosine(Tyr.) residue of Bombyx mori silk fiber from yellow fluorescent cocoon has been examined for the dependence of pH in aqueous silk solution under the presence of orange II salt. Through the peak separation of angular dependence of spectral pattern of 15N-Tyr. and [1-13C]-Tyr. between the fiber axis and the molecular bond direction, N-H bond in fiber as well as the orientation distribution around the fiber axis were analyzed. Also, and sericin component was obtained from these angular dependence of oriented spectral pattern. The pH dependence of the 13C NMR chemical shift of B. mori silk fibroin was examined in aqueous solution in the presince of orange II are broad at pH$\geq$7.0. However, these become sharper at pH$\geq$8.0 and remain sharp at higher pH. In these higher pH range, a chemical shift change occurs due to the deprotonation of the Tyr. side group of fibroin. At higher pH. such a hydrophobic cluster is destroyed because of the electrostatic interaction according to the deprotonation of the Tyr-OH group.

• 한국직업건강간호학회지
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• 제23권1호
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• pp.1-10
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• 2014

Puspose: The study was done to identify the influences of violence experience and violence response on burnout of emergency room nurses. Methods: The subjects of this study were 185 nurses who worked in emergency rooms of 3 university and 15 general hospitals. Data were analyzed using descriptive statistics, t-test, one-way ANOVA, Sheffe test, Pearson correlation coefficient and stepwise multiple regression analysis using SPSS version 12.0. Results: The major findings of this study were as follow: There were significant differences in age, education, emergency room career, position, exercise in general characteristics. There were significant positive correlation between violence experience and burnout, violence response and burnout. The significant factors influencing burnout were job stress, verbal violence, violence preventive program. Shift pattern, which explained 28% of the burnout. Conclusion: It is necessary to develop an intervention program for emergency room nurses to improve job stress, verbal violence, violence preventive program. Shift pattern.