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송교혁,전민희,주원종,김기범 한국생산제조학회 2013 한국생산제조학회지 Vol.22 No.3
Recently, the death rate owing to breast cancers has been increasing, and the occurrence age for breast cancers is lowering every year. Mammography is known to be a reliable detection method for breast cancers and works by detecting texture changes, calcifications, and other potential symptoms. In this research on breast cancer detection, candidate objects were detected by using image processing on mammograms, and feature analysis was used to classify candidate objects as benign tumors and malignant tumors. To find candidate objects, image pre-processing and binarization using multiple thresholds, and the grouping of micro-calcifications were used. More than 50 shape features and intensity features were used in the classification. The performance of the detection algorithm by using Euclidian distance method for benign tumors was 93%, and the classification error rate was approximately 2%.
원자력시설 해체 시 극저준위방사성폐기물 처분을 위한국내외 방사성폐기물 분류체계 및 인수기준에 대한 연구
송지영,송교혁,박진호,지승우,도태관,김광표 (사)한국방사선산업학회 2018 방사선산업학회지 Vol.12 No.3
Waste acceptance criteria (WAC) for disposal of very low level waste (VLLW), which isgenerated in large quantities during decommissioning of nuclear facilities should be developed. Forthe WAC development, it is required to investigate current status to develop WAC for disposal ofVLLW. The objective of the present study was to investigate radioactive waste classification andWAC for disposal of VLLW from decommissioning of nuclear facilities. Each country developed itsown system for the classification of radioactive waste. Therefore, the classification system for radioactivewaste in each country was analyzed to review its WAC of the radioactive waste, which is equivalentto the VLLW in the Korea waste classification system. The category of the VLLW in the wasteclassification systems of the International Atomic Energy Agency (IAEA) and the United Kingdom(UK) was similar to the category of the VLLW in the waste classification systems of Korea. For theUnited States (US), the category of Class A was similar to the VLLW in the Korea system. The IAEAprovided the general guidance for the WAC based on the safety assessment of disposal system. TheUS and the UK developed the WAC based on national radioactive waste disposal policy and characteristicsof disposal facilities and radioactive waste in addition to the IAEA general guidance. Therefore,the WAC for disposal of VLLW in Korea should be developed by considering the nationalradioactive waste disposal policy, characteristics of disposal facilities, and the IAEA guidance. Thisstudy results will contribute to establishment of national management system of radioactive waste.