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이호창(Hochang Lee),윤경현(Kyunghyun Yoon) 한국정보과학회 2013 정보과학회논문지 : 시스템 및 이론 Vol.40 No.2
스타일 전이 기법은 참조 영상에 나타나는 질감/색상과 같은 스타일을 결과 영상에 반영하는 기법이다. 기존의 스타일 전이 기법 연구들은 색상이나 질감 중 하나의 특징에 초점을 맞추어 진행되었으며, 두 가지 특징을 동시에 반영한 연구는 활발히 연구되지 않았다. 또한 스타일 전이를 위해 후보 픽셀 집합을 구할 때 단순히 임의의 픽셀들로 구성하기 때문에 때때로 안 좋은 결과 영상을 생성하였다. 본 연구에서는 참조 회화 작품의 색상과 질감 정보를 동시에 반영하는 알고리즘을 제안한다. 이때 참조 영상의 스타일을 효과적으로 반영하기 위해 영상의 중요도 정보를 이용한다. 우리는 참조 영상과 대상영상의 중요도를 고려하여, 중요도가 유사한 영역간에 스타일이 반영될 수 있도록 하였다. 우리의 알고리즘은 색상과 질감을 동시에 반영하기 때문에 기존 연구에 비해 참조 영상의 느낌을 잘 전이할 수 있었다. 또한 임의의 픽셀을 기반으로 후보 집합을 구성하는 것이 아닌, 중요도 정보를 추가로 반영하기 때문에, 영역별로 보다 명확하게 특징을 반영할 수 있었다. Style transfer re-renders a target image with texture or color taken from parts of a source image that is matched locally to the target image. Existing style transfer techniques are largely divided into two part, color and texture, and many researches of them are proposed for expressing non-photorealistic rendering based on style transfer techniques. However, most of previous researches are focused only one part (color or texture) and don’t consider both color and texture information. Additionally they construct candidate pixel set for transfer by random access approach. So they sometimes make unnatural results. In this paper, we propose a novel style transfer technique that takes into account the both color and texture of the source image. Our method uses image saliency values to construct a candidate set for transfer style of source effectively. We consider saliency of target and reference image, and then match the style to region with similar saliency value. Different from previous works, we consider both color and texture information. So we can express more similar result from source image. Also we can express more realistic effect per each region because we construct candidate set based on image saliency information.
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인체 치은 섬유아세포의 성장과 부착에 관한 Chlorhexidine의 효과
이호,이인규,김형섭,Lee, Ho,Lee, In-Kyu,Kim, Hyung-Seop 대한치주과학회 1993 Journal of Periodontal & Implant Science Vol.23 No.3
The Chlorhexidine(CHX) has been a widely used adjunt in periodontal therapy due to its bactericidal effect. In spite of the effects of CHX exhibits cytotoxic to human cells and delays granulation tissue formation. Therefore, understanding the effects of CHX on fibroblast attachment and cell growth will provide the rationale for its use during healing phase of periodontal surgery. This study was undertaken to examine the effects of standardized CHX-pretreated dentin slices and direct CHX exposure on human gingival fibroblasts. The results were as follow : 1. In experiment 1, there was a significant reduction in the number of fibroblast attachment in 0.12, 1%-pretreated groups relative to the control, 0.05%-pretreated groups(P<0.05). 2. In experiment 1, the control, 0.05%-pretreated groups showed considerable attachment and typical fibroblastic morphology, but 0.12, 1%-pretreated groups showed irregular, round-up (unattached) fibroblastic morphology. 3. In experiment 2, it appeared that all experimental groups exhibits significant inhibition of cell growth when compared with the control group.
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이호범,이중기,신대윤,Lee, Ho-Beom,Lee, Jung-Ki,Shin, Dae-Yewn 한국환경보건학회 2005 한국환경보건학회지 Vol.31 No.5
This study is undertaken to find the optimal method to make the decision on the degree of water pollution by comparison of K-WQI, KOE-WQI that is made for index with the water quality index and water quality environment standard of the Frame Act on Environment Policy as the result of survey for water quality reality on the major point of the Yeongsan river from 2002 to 2004. The water quality of major rivers has some differences depending on seasons. however, under the water quality standard by the $BOD_5$ density, most of rivers displayed the water quality level of $II{\sim}III$ grading, and on K-WQI that is classified by indexing for 10 categories of pH, DO, $BOD_5,\;COD,\;SS,\;T-N,\;NH_3-N,\;NO_{3^-}$ N, T-P, and E-Coli and classified into 5 groups from 100 points to 40 points, they displayed the score distribution of the first grade in water quality for $85{\sim}100$ points to the second grade in water quality for $70{\sim}84$ points. On KOE-WQI that is classified by indexing for 5 categories of pH, DO, $BOD_5$, COD and T-coli and classified into 5 groups from 90 points or above for outstanding and 29 points or below for very bad, and the water quality distribution is made ranged from the first grade in water quality for 90 points or more to the third grade in water quality for $69{\sim}50$ points. In addition, for the contribution of the water quality decline, the Environmental standard has significant dependency on the $BOD_5$ density, with K-WQI contributing in various water quality decline depending on the environment around the river area of $BOD_5,\;T-N,\;NH_3-N,\;NO_3-N,\;T-P$, and E-Coli, and KOE-WQI acting os the factor contributing to lower the water quality decline by $BOD_5$, COD, and T-coli. As such, the current water quality environment standard has high dependency on $BOD_5$ and KOE-WQI excludes some nitrogen and phosphorus that considers the river environment that the grade in water quality is set by some category, and K-WQI reflected well of the ecology environment of rivers with the diversity of the assessment factor as well as to have the low dependency of specific factor to be objective.
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이호형 ( Ho Hyung Lee ) 한국통상정보학회 2015 통상정보연구 Vol.17 No.4
본 연구의 목적은 전자정부와 전자무역 수출을 위한 협력모형을 도출하는 것이다. 전자정부와 전자무역 수출 성공사례 조사를 통해 바람직한 협력모형을 도출하였다. 한국의 전자정부 경쟁력은 세계 최고 수준이다. 3회 연속 UN 전자정부 발전지수 세계 1위를 달성했다. 2014년 한국 전자정부 수출실적은 4억 7천만 달러를 달성하였다. 한국 정부는 전자무역의 경험과 시스템이 고부가가치 수출품이 될수 있도록 지원하고 전자무역의 글로벌 확산을 위한 국가 간 협력도 강화하고 있다. 전자무역시스템 수출실적은 총 7개국 1600만 달러에 달한다. 하지만, 전자정부와 전자무역 수출 자금 지원, 정보수집·공유, 행정혁신경험 전수 등 기능이 각 정부조직 및 기관에 흩어져 있어서 각각 업무를 수행하고 정보가 공유되지 않고 있다. 본 연구에서 4가지 협력모형을 제시하였다. 전자정부 해외진출 지원센터 모형, 행정자치부를 중심으로 하는 공동관리 모형, 기업간 협력을 위한 상호서비스 모형, 정부 내 협력을 위한 상호교환 모형을 제시하였다. 본 연구의 시사점은 협력모형을 통한 수출 전략국가 선정, 효과적인자원 투입, 사업 공동 발굴을 제안하였다. 전자정부 수출 관련 정책제안과 실효성에 관한 후속 연구들이 기대된다. The purpose of this study is to derive a collaboration construct for e-government and e-trade exports. The collaboration construct was derived through e-government and e-trade export case studies. The e-government of Korea has world-class competitiveness. Korea has been placed three consecutive times as world best in UN e-government development index. E-government export performance by Korea was $ 470 million in 2014. Korea is also strengthening cross-national cooperation to help global spread of e-trade. Exports of e-trade systems earned $ 16 million in seven countries. However, the duties and informations of each government organizations and institutions are scattered. I have suggested four collaboration constructs in this paper. First, E-government export support model. Second, co-management model by Ministry of the Interior. Third, mutual cooperation model between corporations. Last, exchange cooperation model for government organizations. Implications of this study is selecting a strategical export country by cooperation, effective resource commitment and joint business development. I expect follow-up studies about the effectiveness of policy for e-government exports.
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