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미국(美國)의 도시생활(都市生活)쓰레기 재활용(再活用) 현황(現況)과 전망(展望)
송영준,이계승,신강호,김윤채,서봉원,Song, Young-Jun,Lee, Gye-Seung,Shin, Kang-Ho,Kim, Youn-Che,Seo, Bong-Won 한국자원리싸이클링학회 2011 자원리싸이클링 Vol.20 No.5
This study describes the national municipal solid waste stream of the United States based on data collected and published by EPA for 1960 through 2009. This paper characterizes the municipal solid waste stream of the nation as a whole, and can be useful for understanding the nationwide stream of America. Among the various materials contained in MSW, recycling status of the major materials of paper and paperboard, glass, metals, plastics, food scraps and yard trimmings are discussed somewhat more minutely.
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산성광산배수(AMD) 처리(處理) 슬러지의 중금속(重金屬) 흡착(吸着) 특성(特性)
송영준,이계승,신강호,김윤채,서봉원,윤시내,Song, Young-Jun,Lee, Gye Seung,Shin, Kang Ho,Kim, Youn-Che,Seo, Bong Won,Yoon, Si-Nae 한국자원리싸이클링학회 2012 자원리싸이클링 Vol.21 No.4
This study was carried out for the purpose of obtaining basic data to utilize the AMD sludge as sorbent for heavy metal ions. The sludge from the treatment process of Acid Mine Drainage mainly consists of fine iron hydroxide or iron oxide hydrate and calcite, and the fine iron hydroxide or iron oxide hydrate has a property of adsorbing heavy metal ions. In this study, we investigated the physical property of the AMD sludge like as mineral composition, particle size and shape and chemical composition and also investigated the influence of dosage of sludge, adsorbing time, pH, initial concentration and sintering temperature on the adsorption of heavy metal ions.
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Effects of Magnetovolume and Spin-orbit Coupling in the Ferromagnetic Cubic Perovskite BaRuO3
송영준,이관우 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.12
BaRuO3 having five different crystal structures has been synthesized by varying the pressurewhile sintering. Contrary to the other phases being nonmagnetic, the cubic perovskite phase synthesizedrecently shows an itinerant ferromagnetic character. We investigated this ferromagneticBaRuO3 using first principles calculations. A few van Hove singularities appear around the Fermienergy, causing unusually high magnetovolume effects of M/a 4.3 µB/°A as well as a Stonerinstability [IN(0) 1.2]. At the optimized lattice parameter a, the magnetic moment M is 1.01µB in the local spin density approximation. When spin-orbit coupling is included, the topologies ofsome Fermi surfaces are altered, and the net moment is reduced by 10% to a value very close to theexperimentally observed value of 0.8 µB. Our results indicate that this ferromagnetism is inducedby the Stoner instability, but the combined effects of the p − d hybridization, the magnetovolume,and the spin-orbit coupling determine the net moment. In addition, we briefly discuss the resultsof the tight-binding Wannier function technique.
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송영준,김미혜,김동우,김남 한국콘텐츠학회 2006 한국콘텐츠학회논문지 Vol.6 No.5
This paper proposes visual-feature extraction for each band in wavelet domain with both spatial frequency features and multi resolution features, and the combination of visual features using fuzzy integral. In addition, it uses color feature expression method taking advantage of the frequency of the same color after color quantization for reducing quantization error, a disadvantage of the existing color histogram intersection method. Also, it is found that the final similarity can be represented in a linear combination of the respective factors(Homogram, color, energy) when each factor is independent one another. With respect to the combination patterns the fuzzy measurement is defined and the fuzzy integral is taken. Experiments are performed on a database containing 1,000 color images. The proposed method gives better performance than the conventional method in both objective and subjective performance evaluation. 본 논문은 공간주파수 특징들과 다중 해상도 특징들을 가진 웨이블렛 영역에서 추출된 각 대역의 시각 특징 추출과 이들의 퍼지 적분 조합에 대하여 제안하였다. 칼라 양자화 이후에 똑같은 칼라의 빈도를 취함으로써 기존의 칼라 히스토그램 인터섹션 방법의 단점인 양자화 에러를 줄일 수 있게 칼라 특징을 표현한다. 또한 유사도는 서로 독립적인 특성을 갖는 호모그램, 칼라, 에너지 특징을 퍼지 측도와 퍼지 적분을 사용하여 조합한다. 1,000개의 칼라 영상에 대하여 실험을 하였고, 제안된 방법이 기존 방법들보다 객관적이고 주관적인 성능에서 우수함을 보였다.
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웨이브릿 영역에서 기하학적 특징과 PCA/LDA 를 사용한 얼굴 인식 방법
송영준,김영길 한국콘텐츠학회 2004 한국콘텐츠학회논문지 Vol.4 No.3
This paper improved the performance of the face recognition system using the PCA/LDA hybrid method based on the facial geometric feature and the Wavelet transform. Because the previous PCA/LDA methods have measured the similarity according to the formal dispersion, they could not reflect facial boundaries exactly. In order to recover this defect, this paper proposed the method using the distance between eyes and mouth. If the difference of the measured distances on the query and the training images is over the given threshold, then the method reorders the candidate images according to energy feature vectors of eyes, a nose, and a chin. To evaluate the performance of the proposed method the computer simulations have been performed with four hundred facial images in the ORL database. The results showed that our method improves about 4% recognition rate over the previous PCA/LDA method. 본 논문은 얼굴의 기하학적인 특징과 웨이브릿 변환을 사용한 PCA/LDA 복합 방법을 제안하여 얼굴 인식 시스템의 성능을 향상시켰다. 기존의 PCA/LDA 방법은 형태적인 분산의 정도에 따라 유사도를 측정하였기 때문에 얼굴 윤곽선을 정확하게 반영하지 못하였다. 이 단점을 극복하기 위하여 본 논문에서는 눈과 입사이의 거리를 측정하여 질의영상과 훈련영상에서 큰 차이가 있을 경우에는 얼굴내의 눈, 코, 턱 각각의 영역에 대한 에너지를 특징 벡터로 사용하여 기존의 PCA/LDA로 계산한 유사도를 재산정하였다. 본 논문에서 제안한 방법을 이용해서 ORL 데이터베이스의 400개 얼굴 영상에 대해 모의 실험한 결과 기존의 PCA/LDA 방법보다 약 4%의 인식률 향상이 있음을 보였다.
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