• Journal of Korean Society of Transportation
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• v.29 no.3
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• pp.103-114
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• 2011

In this study, we discuss a fatal accident severity model obtained from the analysis of 112 crash sites collected since 2000, and the resulting relationship between fatal accidents and roadway geometry design. From the 720 times computer simulations for improving driving safety, we then reached the following conclusions:. First, the result of cross and frequency-analyses on the car accident sites showed that 43.7% of the accidents occurred on the curved roads, 60.7% on the vertical curve section, 57.2% on the roadways with radius of curvature of 0 to 24m, 83.9% on the roads with superelevation of 0.1 to 2.0% and 49.1% on the one-way 2-lane roads; vehicle types involved are passenger vehicles (33.0%), trucks (20.5%) and buses (14.3%) in order of frequency. The results also show that the superelevation is the most influencing factor for the fatal accidents. Second, employing the Ordered Probit Model (OPM), we developed a severity model for fatal accidents being a function of on various road conditions so as to the damages can be predicted. The proposed model possibly assists the practitioners to predict dangerous roadway segments, and to take appropriate measures in advance. Third, computer simulation runs show that providing adequate superelevation on the segment where a fatal accident occurred could reduce similar fatal accidents by at least 85%. This result indicates that the regulations specified in the Rule for Road Structure and Facility Standard (description and guidelines) should be enhanced to include more specific requirement for providing the superelevation.

• Korean Journal of Remote Sensing
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• v.35 no.6_2
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• pp.1083-1093
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• 2019

The purpose of this study is to detect the burned area change by direct burning of tree canopies and post-fire mortality of trees via analyzing satellite imageries from the Korea multi-purpose satellite-2 and -3 (KOMPSAT-2 and -3) for two large-fires over the Goseong-Sokcho and Gangneung-Donghae regions in April 2019. For each case, the burned area was compared between two dates: the day when the fire occurred and 15-18 days after it. As the results, within these two dates, there was no substantial difference in burned area of sites whose severities were marked as "Extreme", but sites with "High" and "Low" severities showed significant differences in burned area between the two dates. These differences were resulted from the lagged post-fire browning of canopies which was detected by images from in-situ observation,satellite, and the unmanned aerial vehicle. The post-fire browning started after 3-4 days and became apparent after 10-15 days. This study offers information about the timing to quantify the burned area by large fire and about the mechanism of post-fire mortality. Also, the findings can support policy makers in planning the restoration of the damaged areas.

• Proceedings of the Korea Contents Association Conference
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• 2004.05a
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• pp.144-150
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• 2004

GIS 콘텐츠의 가장 중요한 대상이 되는 지형 및 지리 공간정보는 다양한 자료의 수집과 변환에 의한 시스템 통합을 통하여 완성된다. 즉 다양한 공간자료의 통일된 표준화에 의해 통합을 이룰 수 있으므로, 그 내용과 형태가 서로 다른 공간정보는 처음 수집된 상태에서 여러 변환 과정을 통해 다른 형태와 영상으로 새롭게 생성되어 통합을 이루는 요소가 될 수 있다는 것이다. 본 연구에서는 대형 댐의 건설로 인하여 수몰된 지역의 과거의 지공간의 정보원 찾아 현실세계와 비교하여 그 차이를 살펴보기 위하여 영상복원을 하는데 이용된 여러 가지의 지공간 자료의 처리과정을 통하여 일반 사진부터 디지털 위성영상자료, 수몰 직전에 제작된 지형도, 마을 사진 등을 통합과정 을 통하여 수몰 이전의 GIS콘텐츠의 공간정보의 통합에 의한 활용 기법을 확인하였다.

• Journal of Korea Fair Competition Federation
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• no.84
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• pp.12-21
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• 2002

Staples - Office Depot 합병사건에서 연방거래위원회는 가격 자료에 의거한 계량분석 방법을 동원하여 대형 사무용품 매장을 통한 소모성 사무용품 판매시장이 별개의 시장이라는 점을 보여줌으로써 위원회 결정의 근거를 삼음과 동시에 법원을 설득하였고, 이를 통하여 공정거래 분야에서 경제분석의 중요성과 효과를 새삼 인식하는 계기가 되었다.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2008.04a
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• pp.483-485
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• 2008

• The Science & Technology
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• v.32 no.10 s.365
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• pp.78-80
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• 1999

20세기 중반인 세계2차대전중에 수집된 미국ㆍ독일ㆍ영국해군의 해양관측자료들은 대서양 등 3대 해양의 현상과 신비를 파악하는데 크게 기여했다. 미국을 비롯한 선진 해양국가들은 대형 탐사선으로 해저지형과 해저층세 또는 판구조원리를 연구하여 20세기 후반의 해양학은 깊은 바다 해수의 물리적 특성과 생물순환의 비밀까지 규명할 수 있게 되었다.

• Korean Architects
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• no.8 s.304
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• pp.32-41
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• 1994

본지에서는 최근 논란이 되고있는 대형건설업체의 설계용역업허용요구와 관련해 건축설계업과 건설시공간의 상호관계 및 역할분담 등에 관한 선진외국의 사례들을 모아 조사ㆍ확인함으로써 건설업체의 이같은 주장에 대한 부당성을 지적하고 이를 통해 우리 현실에 맞는 제도로 발전시켜 나가고자 한다. 또한 이번 조사내용은 국내건축문화 발전의 건전한 풍토조성과 국제경쟁력 강화를 위한 방안을 모색하는데 귀중한 자료로 삼고자 한다.

• Journal of the Society of Naval Architects of Korea
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• v.39 no.2
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• pp.1-10
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• 2002

Hull-propeller-rudder interactions are studied by the iterative computational procedures. Hull effects on the propeller are reflected through the effective velocities computed by the vortex ring method which used the measured nominal wake as input data. A potential based panel method has been developed to solve the propeller-rudder interactions using the obtained effective velocities. Steady flow characteristics around the rudder surface can be obtained by computing the induced velocities on the rudder by the propeller and vice versa are computed by the iterative manner until the converged solutions are obtained. Flow characteristics around the propeller and the rudder are measured by Laser Doppler Velocimetry(L.D.V.) in large cavitation tunnel at Samsung Heavy industries. The gap flow model is adopted to solve the characteristics of the horn rudder. Numerical results are compared with the experimental values and the computed velocity fields and pressure distributions with rudder angle on the horn rudder surface show good agreement with measured ones in large cavitation tunnel.

• The Journal of the Korea institute of electronic communication sciences
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• v.11 no.3
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• pp.339-344
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• 2016

This study is conducted for analysis of distribution of macrobenthic by using satellite image and in-situ data in the intertidal zone of Suncheon bay. The satellite images on low tide on July 7, 2010 and high tide on Sept. 25, 2010, respectively, are classified into sea water, tidal flat and land. It is to extract for intertidal zone overlaying at low tide and high tide image from previously classified image. Total number of species emergence are 196 species in the intertidal zone, and most species are emergence in the right part of the subtidal zone. The Sigambra tentaculata is the dominant species and emergence the Mediomastus californiensis, Magelona japonica, etc. It is noticed that many kind of macrobenthic distribution in the subtidal zone more than the supralittoral zone. It find out that contamination due to organic through the macrobenthic distribution with a strong resistance to organic in the subtidal zone of Suncheon Bay.

• Journal of the Society of Naval Architects of Korea
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• v.36 no.1
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• pp.53-60
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• 1999

Prior to sea trials, dock trials are usually carried out in order to check the main propulsion system and auxiliaries. At that time the motion of a ship is limited by mooring ropes. In Hyundai Heavy Industries, a simple equation is used to obtain propeller thrust which is used as an input data of mooring analysis. Recently the ship size and the engine power become larger. Therefore a careful analysis of the mooring condition is necessary in order to avoid possible accidents. In this study propeller thrust at deck trials is reviewed and examined through a series of model tests.