• Proceedings of the Korean Society of Precision Engineering Conference
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• 1995.04b
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• pp.414-419
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• 1995

The wire displacement of wire electric discharge machine has been measured using He-Ne laser. A measurement system consisted of He-Ne laser, A/D converter, 4 divided photodiode, amplifier, sensor process instrument, and personal computer. The processing parameters were varid with feed rate, wire tension, wire speed and voltage. The laser beam intensity transmitted on a 4 divided photodiode was varied by processing wire electric descharge machine with various process parameters. The 4 divided photodiode and amplifier were used to change the detected beam intensity into voltage. Variation of wire displacement was between 11 and 125 .mu. m. The wire tension was dominant on the variation of wire displacement among many parameters.

• Nuclear Engineering and Technology
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• v.43 no.3
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• pp.287-300
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• 2011

Counting statistics modified by introducing two dead times in series under a Poisson input distribution are discussed. A previous study examined the two cases of series combinations of nonextended-extended (NE-E) and extended-extended (EE) dead times. The present study investigated the remaining two cases of extended-nonextended (E-NE) and nonextended-nonextended (NE-NE) dead times. For the three time origins of the counting processes - ordinary, equilibrium, and shifted processes - a set of formulae was newly developed from a general formulation and presented for the event time interval densities, total densities, and exact mean and variance of the counts in a given counting duration. The asymptotic expressions for the mean and variance of the counts, which are most convenient for applications, were fully listed. The equilibrium mean count rates distorted by the three dead times in series were newly derived from the information obtained in these studies. An application of the derived formulae is briefly discussed.

• Korean Journal of Optics and Photonics
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• v.4 no.4
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• pp.493-495
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• 1993

The frequency of the 633 nm internal mirror He-Ne laser has been stabilized by using the beat frequency and the intensity difference between two Zeeman split components in a transverse magnetic field. The frequency stability and the frequency temperature coefficient for the beat frequency method was $7.0{\times}10^{-11}$ and $170 kHz/^{\circ}C$, respectively, and those for the intensity difference was $1.1{\times}10^{-9}$ and $1.8 MHz/^{\circ}C$, respectively.

• The Bulletin of The Korean Astronomical Society
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• v.39 no.1
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• pp.83.2-83.2
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• 2014

We present the two high resolution spectra of the symbiotic star V1016 Cygni obtained with the Bohyunsan Optical Echelle Spectrograph in 2003 and 2005, from which we note the existence of the broad emission feature at 4881 ${\AA}$. We propose that this broad feature is formed from Raman scattering of Ne $VII{\lambda}973$ by atomic hydrogen. Thus far, the detection of Raman scattered lines by atomic hydrogen is limited to O $VI{\lambda\lambda}1032$, 1038 and He $II{\lambda\lambda}940$, 972 and 1025. We perform Monte Carlo simulations to fit the Raman scattered Ne $VII{\lambda}4881$ to investigate the basic spectroscopic properties concerning Ne $VII{\lambda}973$.

• Proceedings of the KIEE Conference
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• 2007.11a
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• pp.171-172
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• 2007

PDP의 luminous efficacy의 향상을 위해서는 동작가스의 연구가 매우 중요하다. 본 논문에서는 bolsig simulator를 사용하여 여러 비율의 Xe+Kr+Ne 3원가스 시뮬레이션을 통하여 각 가스입자들에 전달되는 이온화에너지, 여기에너지를 조사하였다. 실험에서 short discharge gap과 long discharge gap을 가진 7인치 테스트 패널 2개를 사용하여 가스압력과 Xe+Kr+Ne 혼합비를 변화시켜가며 discharge voltage, luminance, luminous efficacy를 측정하여, 방전특성을 연구하였다.

• Journal of Advanced Marine Engineering and Technology
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• v.25 no.4
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• pp.869-879
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• 2001

Serial communications such as RS-232C or RS-485 have been used to control and monitor the industrial plants for a long in cooperating with a computer or microprocessor. In recent years a great deal of effort has been made to achieve these control and monitoring through Internet network. This paper proposes a microprocessor system to implement remote control and monitoring system through Internet network. The proposed system uses NE2000 compatible NIC for data link and physical layer to access Internet network The microprocessor employed in the system plays a role of interfacing NE2000 compatible NIC interpreting protocols above link layer, controlling and monitoring industrial plants simultaneously. This paper also shows MMI and experimental results which control and monitor two power plants on the computer monitor with a mouse remotely to verify the proposed.

• Proceedings of the Korean Society of Computer Information Conference
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• 2020.07a
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• pp.239-242
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• 2020

본 논문에서는 Novel Engineering(NE) 기반 메이커 교육이 우리나라 초등 교육과정의 성취기준을 달성하기에 적합한 방법인지를 분석하여 확인한다. NE는 공학과 문해력의 융합교육으로 책 속에서 문제 상황을 찾아 이를 해결하기 위해 공학적 산출물을 만드는 문제 해결 교육 방법이다. 국내에서는 초등학생을 대상으로 NE의 적용에 대한 연구가 점점 늘고 있으나, 교육과정 적합성과 관련된 연구는 매우 부족하다. 본 논문에서는 2015 개정 실과 및 국어 교육과정의 분석을 통하여 NE와 초등 교육과정 간의 연관성을 확인하였다.

• ETRI Journal
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• v.46 no.2
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• pp.307-322
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• 2024

Most object detection methods use a horizontal bounding box that causes problems between adjacent objects with arbitrary directions, resulting in misaligned detection. Hence, the horizontal anchor should be replaced by a rotating anchor to determine oriented bounding boxes. A two-stage process of delineating a horizontal bounding box and then converting it into an oriented bounding box is inefficient. To improve detection, a box-boundary-aware vector can be estimated based on a convolutional neural network. Specifically, we propose a ResNeXt101 encoder to overcome the weaknesses of the conventional ResNet, which is less effective as the network depth and complexity increase. Owing to the cardinality of using a homogeneous design and multi-branch architecture with few hyperparameters, ResNeXt captures better information than ResNet. Experimental results demonstrate more accurate and faster oriented object detection of our proposal compared with a baseline, achieving a mean average precision of 89.41% and inference rate of 23.67 fps.

• Proceedings of the Optical Society of Korea Conference
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• 2005.02a
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• pp.328-329
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• 2005

• Proceedings of the Optical Society of Korea Conference
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• 1997.08a
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• pp.79-79
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• 1997