• 발명특허
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• v.35 no.9
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• pp.18-26
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• 2010

• 발명특허
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• v.35 no.10
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• pp.36-41
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• 2010

• Proceedings of the Korea Water Resources Association Conference
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• 2011.05a
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• pp.355-355
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• 2011

토지피복의 분류는 토지표면의 물리적인 지표면의 상태를 나타내는 자료로 환경, 행정, 수자원, 재해 등 다방면으로 이용되고 있다. 특히 수자원과 관련하여 식생의 증산과 토양의 증발을 통칭하는 증발산과 유출, 토양수분 등과 연관되어 있다. 광범위한 토지피복의 산정에는 경제성 및 주기성 등의 장점으로 인하여 인공위성 영상을 이용하는 기법이 적합하다. 위성영상분류법은 훈련지역의 선정 여부에 따라 감독분류와 무감독 분류로 나누어지며 각각의 알고리즘의 특성에 따라 더욱 세분화된다. 본 연구에서는 Landsat-TM (Thematic Mapper) 영상을 이용하여 감독 분류와 무감독 분류를 각각 적용하여 한강유역의 토지피복을 수역, 시가, 나지 습지, 초지, 산림, 농지의 7가지 부분으로 대분류로 산정하고 비교하였다. 두 경우의 정확도는 각각 91.6%, 90.9%의 비슷한 정확도를 나타내었으며, 세부적으로 우리나라의 대부분의 면적에 분포하는 산림, 농지, 시가, 수역의 정확도가 높게 나타났다. 또한 각 항목별로 정확도를 비교하였을 때 감독분류가 무감독분류에 비해 다소 정확한 것을 확인할 수 있었다. 추후 외부자료를 도입하면 비교적 낮은 정확도를 나타낸 초지, 습지, 나지의 정확도를 보완할 수 있을 것이다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.29 no.9C
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• pp.1269-1278
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• 2004

While the management of digital contents is getting more and more important, many researchers have studied about scene change detection algorithms to reduce similar scenes in the video contents and to efficiently summarize video data. The algorithms using histogram and pixel information are found out as being sensitive to light changes and motion. Therefore, visual rhythm gets used in recent work to solve this problem, which shows some characteristics of scenes and requires even less computational power. In this paper, a new scene detection algorithm using visual rhythm by direction is proposed. The proposed algorithm needs less computational power and is able to keep good performance even in the scenes with motion. Experimental results show the performance improvement of about 30% comparing with conventional methods with histogram. They also show that the proposed algorithm is able to keep the same performance even to music video contents with lots of motion.

• Korean Security Journal
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• no.47
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• pp.139-165
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• 2016

In Mongolia, the regulation related to the private security industry, the Law on Contracted Private Security Services, was legislated relatively recently. The Law on Contracted Private Security Services was enacted into law in Mongolia 16 years ago, in 2000. This regulation has undergone two amendments since its inception. However, new revisions still need to be made to ensure that this regulation is in line with internationally accepted standards and practices. This paper compares the existing private security regulations of South Korea and Mongolia. The purpose of this comparative study was to identify the weaknesses of and problems in the Mongolian regulation and propose amendments to the Mongolian regulation. The comparative study of the two countries' regulations showed and underscored an imperative need to make further amendments to the Law on Contracted Private Security Services. Specifically, the weaknesses of and problems in the Mongolian regulation at issue include the following: the level of accuracy in defining certain legal terms and providing the proper names for various regulations; stipulations which set forth the procedure for registering a private security company; provisions regarding operating a private security company; the details of eligibility and accountability requirements concerning chief executives and security service officers; and the scope of work provisions. This study proposes constructive amendments to strengthen the Law on Contracted Private Security Services.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.27 no.5
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• pp.659-672
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• 1994

Four simple plotting techniques using the distribution of individuals among species were applied and the results discussed to evaluate the methods for detecting organic pollution-induced perturbation in marine benthic communities in Chinhae Bay, Korea: Rarefaction method, Abundance-Biomass Comparison method, Log-Normal Distribution method and Rank-Frequency Diagram method. Their distribution curves offered more information on the community structure than other frequently used diversity indices and distinguished clear evidence of an effect of environmental pollution with gradient. However, the Abundance-Biomass Comparison method could not be considered applicable due to the presence of larger slowly growing K-strategists in a polluted area of the inner Chinhae Bay, Korea.

• The Proceeding of the Korean Institute of Electromagnetic Engineering and Science
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• v.22 no.1
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• pp.52-62
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• 2011

본고에서는 최근 디지털 통신 시스템에 대한 국제 표준으로 도입된 RMS-AV 가중치 측정법을 CISPR F쪽으로의 도입 문제가 거론되는 상황에서 현존하는 가중치 측정법에 관련된 기본적인 내용을 검토하고, 참고문헌 [13]에서 제시하였던 방법을 이용하여 와인 냉장고와 두 종류의 전기 드릴에 대하여 RMS-AV 가중치 측정법을 전도성 방출 특성과 복사성 방출 특성을 AM 방송 송출시, 방송 중단 시, 차폐 실내 등의 다양한 환경에서 측정하여 EMI 수신기에서 적용되고 있는 가중치를 실험적으로 비교하였다. 비교 결과, 다양한 가중치 측정법이 동일한 결과를 제시하지 못하여 RMS-AV 측정법이 CISPR F쪽으로의 도입은 좀 더 연구가 필요한 주제로 판단되었고, 결론 부분에서 RMS-AV 측정법에 대한 여러 가지 문제점을 고려해 보았다.

• Proceedings of the Korean Association for Survey Research Conference
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• 2001.04a
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• pp.73-86
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• 2001

In this paper, we conducted an empirical study to investigate the design and weighting effects on descriptive and analytic statistics. We compared the regression models using the design-based approach and the generalized estimating equations(GEEs) approach with the model-based approach through the design and weighting effects analysis.

• The Journal of the Acoustical Society of Korea
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• v.6 no.2
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• pp.54-61
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• 1987

This paper is to suggest the test method of sound attenuation caused by absorptive duct silencer using sound intensity method in field. In order to estimate sound attenuation, sound power being radiated from sound power source and duct exhaust terminal was measured by the sound pressure method and sound intensity method in semianechoic and common room. The results of the measured sound attenuation values by sound intensity method are more similar to those of theoretical calculation than those by the sound pressure method. In addition, sound intensity method is much less influenced by sound field condition or continuous background noise than the sound pressure method.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.8 no.2
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• pp.17-22
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• 1990

The Digital Terrain Model(DTM) data in the Geographic Information System(GIS) needs to be interpolated for various purposes. Three interpolation methods-Bilinear, Bicubic Spline, and Gregory-Newton interpolation-were used, compared, and analyzed in terms of the visual comparison and numerical analysis in the hilly terrain and relatively flat terrain.