• Proceedings of the KIEE Conference
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• 2006.04a
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• pp.339-341
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• 2006

This paper proposes a method of container position measurement using automatic landing system that is estimated by a laser range finder. In the most of container position measurement methods, CCD cameras or laser scanners have been used to get the source data. However those sensors are not only weak for disturbances, for examples, the light, fog, and rain, but also the system cost is high. When the spreader arrives the goal position, it is still swung by inertia or by wind effect. In this paper, the spreader swung data have been used to find the container position. The laser range finder is equipped in the front side of spreader. It can measure distance and relative position between spreader and container. This laser range finder can be rotated as desired by a motor. And a tilt sensor is equipped on the spreader to measure spreader sway. We estimate the relative position information between the spreader and a container using the laser range finder and tilt sensor through the geometrical analysis.

• Journal of the Korean Applied Science and Technology
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• v.16 no.3
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• pp.199-203
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• 1999

The symmetric benzoxazolo carbocyanine is of industrial importance as green-sensitizing dye in the spectral sensitization of emulsion microcrystals in positive paper and negative film-making. The stability on the solvents of benzoxazolo carbocyanine dye was measured by UV-Vis spectrophotometer, and then all of solvents were stabilized sensitizer. The maximum absorption peak range in methanol, acetonitrile, acetone, DMF, dichloromethane, chloroform solvents was $501nm{\sim}511nm$. But it was identified that only methanol can be used to photographic emulsion. The photographic characteristics have contrast of 2.8, speed of 50-55$(lux{\cdot}sec)^{-1}$, fog of 0.07-0.08, respectively.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 1998.04a
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• pp.56-63
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• 1998

A fiber optic gyrocompass for ships was made in consideratino of cost, reliability and convenience. In order to reduce the cost a cheaper fiber sensor was used inthis system. The accuracy was increased by replacing a 180ppr-slit disk with a 1000ppr-encoder. The reliability was also increased by improving the signal processing electronics. This system was made as a heading angle display type for convenience. Although more inexpensive FOG than that of the previous system was used , the accuracy of this compass was increased about 0.5$^{\circ}$. Moreover, it has a very fast warm-up time of about 5minutes. Therefore, this compass can show the prospect of proactical use on ships if it is installed ona stabilizer against the dynamic motion such as rolling and pitching.

• Journal of Broadcast Engineering
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• v.18 no.2
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• pp.140-148
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• 2013

The haze removal algorithm using median dark channel prior is an efficient and fast method with relatively accurate transmission estimation. However, conventional methods may produce color distortion since the method ignores the color mismatch between estimated airlight and actual airlight. In this paper, we propose a color correction with measuring color fidelity in the HSI color space. Experimental results show that the proposed algorithm gives better color correction scheme.

• Journal of the military operations research society of Korea
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• v.22 no.2
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• pp.1-17
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• 1996

Sun Tzu once clarified that "One who knows the enemy and knows himself will not be endangered in a hundred engagements, " while Clausewitz explained that "A victory will be guaranteed for one who can overcome 'fog and friction' at a battlefield." Now the U.S. is striving hard to develop an American version of RMA (Revolution in Military Affairs)/MTR (Military Technical Revolution) by utilizing its rapidly emerging information technology in the information age. The U.S. firmly believes that its RMA/MTR with less defense expenditure can provide all combat players in the battlespace with "dominant battle awareness, " by which no nation will be able to challenge U.S. military superiority. In this paper, the recent efforts of the U.S. Armed Forces on RMA/MTR will be briefly introduced, some lessons and expertises from the U.S. RMA/MTR are extracted, and, in this regard, several suggestions are provided for the progress of the ROK Armed Forces.gress of the ROK Armed Forces.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.17 no.9
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• pp.1013-1021
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• 2004

This paper presents the results of spectrum analysis of leakage current waveforms on contaminated polymer insulators under fog conditions. This is a basic study on development of a monitoring for aging degree and surface pollution state using distortion rate(%) of 3rd and 5th harmonics according fundamental frequency[60Hz] under environment conditions. Arcing on the surface was always associated with distortion in the leakage current ; hence the low frequency components of the leakage current can be used as a means to evaluate the surface degradation. The results indicate that the distortion rate by spectrum analysis is available for the monitoring of contamination condition of EPDM Polymer insulators.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2001.11a
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• pp.321-322
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• 2001

대기중 과산화수소($H_2O$$_2$)는 기상과 액상에서 peroxy radicals 간의 결합 (HO$_2$ㆍ+ HO$_2$ㆍ $\longrightarrow$$H_2O$$_2$+O$_2$)에 의해 생성된다. 만약 수소 원자 하나가 organic group으로 치환되면 organic peroxides가 생성된다(Calvert et al., 1985). 이러한 과산화수소($H_2O$$_2$)와 methylhydroperoxide(MHP, $CH_3$COOH), hydroxymethylhydroperocide(HMHP, HOC$H_2O$OH)등의 organic peroxides는 대기 중에서 주요 산화제로 작용한다. 이들 peroxide 물질들은 pH 5 이하의 aqueous phase (cloud, fog and rain water)에서 sulphuric acid (HSO$_4$$^{2-}$ ) 형성에 중요한 역할을 한다(Calvert et al., 1985). (중략)

• Journal of Sensor Science and Technology
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• v.23 no.3
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• pp.149-157
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• 2014

This paper considers the ability of counting and positioning multi-targets by using a mobile UWB radar device. After a background subtraction process, distinguishing between clutters and human body signals, the position of targets will be computed using weighted Gaussian mixture methods. While computer vision offers many advantages, it has limited performance in poor visibility conditions (e.g., at night, haze, fog or smoke). UWB radar can provide a complementary technology for detecting and tracking humans, particularly in poor visibility or through-wall conditions. As we know, for 2D measurement, one method is the use of at least two receiver antennas. Another method is the use of one mobile radar receiver. This paper tried to investigate the position detection of the stationary human body using the movement of one UWB radar module.

• Proceedings of the KSRS Conference
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• 2007.10a
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• pp.365-368
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• 2007

Millimeter-wave (MMW) imaging radiometer systems have an attractive advantage to obtain an image through low visibility weather conditions such as fog, clouds and light rain compared with visible and infrared imaging systems. Many countries have developed a various kinds of MMW imaging radiometers for the aim of low cost and high performance. In Korea, Millimeter-wave Imaging RAdiometer Equipment (MIRAE) has been developed since the end of 2006. Recently the development of some modules was finished for the test model. This paper describes the design and development of the MIRAE. In addition, the test results of its manufactured modules are presented.

• Proceedings of the KAIS Fall Conference
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• 2011.05a
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• pp.276-279
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• 2011

본 논문에서는 고속도로 대형 추돌사고의 원인이 되는 안개로 인한 시정거리 악화를 개선하기 위한 방법으로 염화칼슘 연소탄, 초미립자 살포기, 강풍기, 건조공기 등을 이용한 안개소산 시스템에 대한 연구를 수행하였다. 국내 환경에 적합한 안개소산 시스템을 개발하기 위해 다양한 안개소산 방법에 대한 현장 성능실험을 통해 검증하였고 강풍기와 열풍기를 결합하여 생성한 건조공기를 통해 공기중의 상대습도를 떨어뜨려 안개를 소산하는 방식이 시정거리 개선효과가 우수하였으며 이를 통해 고속도로 및 터널의 출입구 등 안개 발생으로 운전자의 시정거리가 낮아져 발생하는 사고를 미연에 방지할 수 있을 것으로 기대된다.