• 대한방사선방어학회:학술대회논문집
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• 2010.04a
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• pp.206-207
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• 2010

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2008.11a
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• pp.407-408
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• 2008

• Proceedings of the KSRS Conference
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• 2008.03a
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• pp.213-218
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• 2008

동일 지점을 촬영한 위성영상은 위성의 센서나 영상의 취득 시기, 지형의 상태 등에 따라 그 지점에 나타나는 화소값이 일정하지 않다. 이러한 영상은 영상간 모자이크나 변화 탐지 결과에 영향을 미칠 가능성이 높으므로 방사보정(또는 방사정규화)을 통해 화소값의 차이를 최소화시킬 필요가 있다. 본 연구는 선형회귀식을 적용한 상대 방사정규화에 초점을 맞추고 있으며, 선형회귀식 구성에 필요한 PIF(Pseudo Invariant Feature)를 자동으로 추출하기 위해 Ordinal Rank 알고리즘을 적용하였다. 이 방법을 통해 각 밴드별 후보 PIF를 추출하고, 공통으로 해당되는 최종 PIF를 추출할 수 있었다. RMSE(Root Mean Square Error), Dynamic range, Coefficient of variation 등을 통해 방사보정 후의 결과를 평가해보았다. 영상회귀를 이용한 방사보정알고리즘과의 비교를 통해 제안된 알고리즘이 갖는 장점을 확인하였다.

• Nuclear industry
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• v.5 no.2 s.24
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• pp.60-61
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• 1985

프랑스에서는 1969년, 셀부르의 서쪽 약25km 지점에 방사성폐기물저장센터를 설립하여, 프랑스 원자력활동에서 발생하는 중저레벨방사성폐기물을 지표 또는 지하에 최종 저장하고 있다. 그후 1979년에 방사성폐기물관리기관(ANDRA)이 설립되어, 폐기물의 수송이나 저장을 책임지고 있다. 다음은 프랑스의 폐기물처분 현황과 ANDRA의 활동상황이다.

• Korean Journal of Environment and Ecology
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• v.21 no.4
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• pp.347-355
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• 2007

Asiatic black Bear(Ursus thibetanus ussuricus) cubs aged one or two were introduced from Russia(Primosky krai) and North Korea for reinforcement of the bear population and they were released to grow wild in Jirisan National Park. We did research on the characteristics of the denning sites of the Asiatic black cubs, which were released before, from Oct. 2004 to Apr. 2006, and the results were as follows: The released bears hibernated in three types of dens,; tree hollows, rock hollows or ground nests. The hibernating sites were dominated by a community of oak trees and its location was at an average of $923{\pm}221m$ height above the sea level ; the average slope incline was $25.9{\pm}7.9^{\circ}$, and the average denning duration was $98{\pm}9$ days. It was analyzed that the cubs' denning site was $2.8{\pm}2.8km$, on an average, far from the release point; $2.0{\pm}0.9km$ far from villages; $1.9{\pm}1.7km$ far from park inspection trails, and $1.9{\pm}1.0km$ on the average far from a driveway. It is assumed that environmental attributes of the denning sites were closely correlated to those of the release points.

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2016.05a
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• pp.337-338
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• 2016

• Journal of The Korean Radiological Technologist Association
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• v.29 no.1
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• pp.283-283
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• 2003

• Analytical Science and Technology
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• v.16 no.3
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• pp.232-239
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• 2003

The river sediments were collected from 4 points of Seoknam river, one point of Miho river and one point of the joining area of two rivers. For preparation of sample, three sediment samples were collected for the surface, middle and lower part of the sediment at each sampling point. The elemental concentrations were analyzed by neutron activation analysis using HANARO research reactor at Korea Atomic Energy Research Institute, and the concentrations of 30 elements were determined by the relative method using standard reference material of NIST. As a result of analysis, it was found that when the examination and prediction of contamination distribution about the site where the contamination site of river is connected to the lower river is done, the specific gravity of elements which is contained in the sediment and the speed of a current of river should be considered and also found that when the samples for concentration analysis in the river sediments are collected, for the establishment of regional representatives in samples, the range of sampling depth should be determined considering the specific gravity of elements and the speed of a current.

• Proceedings of the KSR Conference
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• 2011.10a
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• pp.2037-2042
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• 2011

The railway electromagnetic environment is much more severe than most commercial and domestic environments. There are concerns about electromagnetic emissions from railways and their potential to interfere with the operation of commercial radio service and other equipment. EMC standards for railway applications are referenced as EN 50121 series and these standards describe the measurement method and specify limits for emission. However standard provide precise description of the general aspect of the measurement procedure and requirement of test equipments, making a reliable measurement of the radiated emissions from a train is a problem of balance between available observation time and the measurement time required by the characteristics of the measurement system. This paper focuses on the problem of measurement.

• Proceedings of the KIEE Conference
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• 1997.07e
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• pp.1708-1711
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• 1997

본 논문에서는 미소간격의 전극에서 방전이 일어날 때 방사되는 전자파로부터 방전전류의 파형을 추정하는 방법에 관하여 검토하고 있다. 시간영역 전자계 측정용 안테나로부터 임의의 위치에서 측정한 전계 또는 자계를 이용하는 1 안테나법(단일 전자계법)과 두 지점에서 측정한 전계 또는 자계를 이용하는 2 안테나법(복수 전자계법)을 제안하고 있다. Wilson & Ma가 제시한 두 지점의 전계로부터 2 안테나법으로 추정한 방전전류의 파형을 Wilson & Ma의 실험결과와 비교하고 있다.