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색상 정보를 이용한 Cascade 방식의 손 영역 검출
조지윤 ( Ji-yoon Jo ),채승호 ( Seungho Chae ),양윤식 ( Yoonsik Yang ),한탁돈 ( Tack-don Han ) 한국정보처리학회 2015 한국정보처리학회 학술대회논문집 Vol.22 No.1
휴먼-컴퓨터 인터렉션과 같은 응용분야에서 손동작 인식을 위한 많은 연구가 이루어지고 있다. 손동작 인식을 이용한 인터렉션의 성능 향상을 위해서는 정확한 손 영역 검출이 필요하다. 본 논문에서는 색상 정보를 이용하여 Cascade 방식에 기반한 손 영역 검출 방법을 제안한다. Cascade 방식으로 손 영 역을 검출할 경우보다 강인한 인식률을 얻기 위해서 색상정보를 이용하였으며, Haar-like 특징점으로 학습된 분류기를 통해 손 영역 검출 방법을 제안한다.
김종도(Jong-do Kim),조지윤(Ji-yun Jo),윤문철(Moon-chul Yoon) 한국생산제조학회 2014 한국생산제조학회지 Vol.23 No.3
In this paper, the natural frequency and damping ratio are analyzed with the acceleration signal of an Euler-Bernoulli beam using the impact hammer test. The results are presented according to crack depth and position using the recursive least squares method. The results are compared and investigated with FEM analysis of CATIA. Both methods agree well with each other regarding the natural mode characteristics. The captured acceleration can be used for the calculation of the natural frequency and damping ratio using time series methods that are based on the measured acceleration. Using these data, a recursive time series model with the acceleration signal was configured and the behaviors of the natural frequency and damping ratio were investigated and analyzed. Finally, the results can be used for the prediction of crack position and depth under different crack conditions for an Euler-Bernoulli beam.
박창한 ( Chang Han Park ),정성애 ( Sung Ae Jung ),류연주 ( Yon Ju Ryu ),조지윤 ( Ji Yoon Jo ),김영신 ( Young Sin Kim ),정혜경 ( Hye Kyung Jung ),김도영 ( Doe Young Kim ),유권 ( Kwoon Yoo ),문일환 ( Il Hwan Moon ) 대한소화기기능성질환·운동학회 2002 Journal of Neurogastroenterology and Motility (JNM Vol.8 No.2
N/A The elderly patients with reflux esophagitis are less likely to feel or report their symptoms than the younger patients, even though they are more prone to complications such as bleeding, stricture or Barrett`s esophagus. In this study we tried to investigate risk factors in the elderly patients who had endoscopically diagnosed reflux esophagitis. Methods: Clinical data of six hundred and eighty seven patients with reflux esophagitis were reviewed. Results: Among the 687 patients with reflux esophagitis, two hundred and thirteen (31%) were 60 or more than 60 years old. The frequency of accompanying hiatal hernia in the elderly group (age≥60) was significantly higher than the younger group (age<60) (16.9%, 36/213 vs. 3.4%, 16/474, p<0.05). There was significant difference according age in the female group (0.9%, 1/114 vs. 22.7%, 22/97, p<0.05). The frequency of atropic gastritis was significantly higher in the elderly group than in the younger group , while other factors such as smoking, H. pylori & peptic ulcer disease were not different between the two groups. Conclusion: Among the risk factors of reflux esophagitis, the existence of hiatal hernia seems to be suggested more relevant to the development of this condition in the elderly group.(Kor ean J ournal of Gastrointestinal Motility 2002;8:139-145)