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베이지안 SOM과 붓스트랩을 이용한 문서 군집화에 의한 문서 순위조정
최준혁,전성해,이정현,Choe, Jun-Hyeok,Jeon, Seong-Hae,Lee, Jeong-Hyeon 한국정보처리학회 2000 정보처리논문지 Vol.7 No.7
The conventional Boolean retrieval systems based on vector spae model can provide the results of retrieval fast, they can't reflect exactly user's retrieval purpose including semantic information. Consequently, the results of retrieval process are very different from those users expected. This fact forces users to waste much time for finding expected documents among retrieved documents. In his paper, we designed a bayesian SOM(Self-Organizing feature Maps) in combination with bayesian statistical method and Kohonen network as a kind of unsupervised learning, then perform classifying documents depending on the semantic similarity to user query in real time. If it is difficult to observe statistical characteristics as there are less than 30 documents for clustering, the number of documents must be increased to at least 50. Also, to give high rank to the documents which is most similar to user query semantically among generalized classifications for generalized clusters, we find the similarity by means of Kohonen centroid of each document classification and adjust the secondary rank depending on the similarity.
최준혁(Choe, JunHyeok),배웅규(Bae, Woongkyoo) 한국주거학회 2020 한국주거학회 학술대회논문집 Vol.32 No.1
As climate change becomes a reality, abnormal weather phenomena such as heat waves, cold waves and fine dust in cities are deepening, they are also affecting residential areas, which are the living places for urban residents. Low-rise residential areas account for 38.2 percent of the city"s total residential areas, and they are highly vulnerable to microclimate phenomena due to insufficient living infrastructure, such as green areas, and aging residential environments. Therefore, this study is intended to examine the seasonal phenomena of urban micro-climate in detail , which has the most direct effect on human life, in low-rise residential areas. Therefore, this study conducted on-site survey by measuring the elements related to microclimate that are felt throughout the year, such as temperature, wind speed and fine dust, during three seasons(summer, fall and winter) with hillside low-rise residential area in Dongjak-gu, Seoul as the study site. The results showed different characteristics of micro-climate depending on the topography, building shape, outer space composition, surface packaging, etc. In particular, due to the hillside and irregular housing arrangements in the northwest, the wind speed from the south has decreased, causing the heat in the target areas to stagnating. Based on these actual results, various methods of improving residential environment are needed to create a pleasant residential environment based on the analysis contents.
Interactive Music을 활용한 실시간 영상 컨텐츠 제작 연구
최준혁(Junheg Choe),오승환(Seunghwan Oh) 한국HCI학회 2010 한국HCI학회 학술대회 Vol.2010 No.1
IT 산업의 성장과 테크널러지의 발전, 그리고 다양한 분야에서의 새로운 욕구들로 인해 예술에서도 단 방향형태에서 에서 양방향 소통의 형태로 발전하였다. 이러한 시도들을 통해 작가의 의도를 일방적으로 전달하는 형태가 아닌 참여자(관객)와 작가의 작품과 소통을 통해 작가가 의도한 메시지를 전달하고 있다. 이러한 형태의 결과물로 표현 하는 예술부분을 인터랙티브 미디어 아트라 한다. 대부분의 인터랙티브 미디어 작품들이 관객의 행위나 환경에 따라 항상 다른 결과물을 표현한다. 이러한 우연성의 예술활동(Aleatoric)기법을 통해 음악으로서의 표현 방법을 연구 할 것이다. 그리고 실시간으로 외부의 신호를 작곡 알고리즘을 통해 음악으로 재구성하며, 작곡의 법칙과 조건을 통하여 멜로디 기반의 구성으로 음계의 스케일(Scale)을 통해 음악적 형태나 구조에 맞춰 진행 되는 멜로디 기반 작곡 알고리즘 중심의 알레아토릭 인터랙티브 뮤직 생성 작품을 제작 하고자 한다. 본 논문에서는 멜로디컴퍼지션의 패턴을 추출, 자동 작곡 알고리즘으로 결과물을 도출하였다. 멜로디 패턴 간의 전이확률행렬(Transitional Probability Matrix)을 도출하고 자동작곡 방법론 및 향후 연구 방향을 제시하는데 목적이 있다.
[디젤엔진부문] 디젤기관에서 연료중의 산소성분이 배기가스 배출 특성에 미치는 영향
최준혁(J.H.Choe),류경현(K.H.Ryu),문학훈(H.H.Moo),오영택(Y.T.Oh) 한국자동차공학회 1999 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1999 No.11_1
Recently, the world is faced with the very serious problems due to the increasing use of the conventional petroleum fuels. Also, the air pollutions of big city were occurred by the exhaust emissions of the automobile. So, lots of researchers have been attracted various oxygenated fuels as an alternative fuel and a renewable fuel for solution of these problems.<br/> In this study, the effect of oxygen in fuel was investigated with the oxygenated fuels for the diesel engine in a viewpoint of smoke emission.<br/> The smoke emission was reduced as the content of oxygen in fuel was increased. This study concluded that the oxygen in fuel reduced the smoke because the oxygen influenced on the combustion process, and that the oxygenated fuels could be effectively used with low smoke emission as a renewable fuel and alternative fuel for the diesel engine.
류마토이드 관절염과 연관된 이차성 신유전분증에서의 반월상 사구체 신염
최정현 ( Choe Jeong Hyeon ),임병국 ( Im Byeong Gug ),최준혁 ( Choe Jun Hyeog ),조현경 ( Jo Hyeon Gyeong ),최영일 ( Choe Yeong Il ),김흥수 ( Kim Heung Su ),신규태 ( Sin Gyu Tae ),김도헌 ( Kim Do Heon ),한재호 ( Han Jae Ho ) 대한신장학회 2001 Kidney Research and Clinical Practice Vol.20 No.6
A case of renal amyloidosis with crescentic glomerulonephritis associated with rheumatoid arthritis is described. A 60-year-old female with 15 years` history of rheumatoid arthritis developed nephrotic syndrome followed by rapid deterioration of renal function. Glomerular amyloid deposition and sclerotic change was present in kidney biopsy specimen and crescentic change was found in 85% of the glomerulus. Electron microscopic finding of glomerulus showed randomly oriented, rigid-appearing, long nonbranching fibrils. The patient was treated with intravenous high-dose methylprednisolone pulses combined with intravenous cyclophosphamide followed by oral corticosteroids. Three months after the above treatment, renal function gradually improved, reaching serum creatinine level to 2.5 mg/dL. But the nephrotic range proteinuria persisted.