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初期變形이 있는 合成板桁 腹部板의 後挫屈 擧動에 關한 硏究
이원태,정태주,박영석 명지대학교 공학기술연구소 1992 공학기술연구소 논문집 Vol.7 No.-
Generally initial out-of-plane deflection is generated during manufacturing or construction, because the width-thickness ratio of a composite girder web plate is very large. This initial deformation due to the lateral deflection, associated with the live load after construction, causes large amount of deformation and wide stress range, leading to the fatigue failure of a bridge. In this study, parametric study for several important parameters was carried out using a structural analysis program ADINA in order to find out the post-buckling behavior of a web plate. The initial conditions required for the analysis of the post-buckling behavior were obtained using a numerical model by varying the lateral forces and in-plane forces to approximate the real condition. For each case, the stress distribution, stress range and post-buckling behavior of web plate subjected to live load were investigated. Based on the numerical results, the effects of thickness and aspect ratio on the stress range and the buckling mode were examined.
이원태 大韓法醫學會 1998 대한법의학회지 Vol.22 No.2
The abdomen includes the organs and viscera below the diaphragm and above the pelvic girdle. Although there is little bony structure to protect these organs from blunt impact, injuries to this region is relatively rare. Like the thorax, the abdomen can be the site of injuries sustained by inner parts of the car and restraint systems. As far as the crucial organs are concerned, the liver, spleen and kidneys are most frequently injured, and it seems to be the most serious and life-threatening. Injury mechanisms of the abdomen are thought to be primarily the result of deformation or penetration of the abdominal contents along with significant force or pressure generation in the deformed organs. In addition, solid organs, such as liver may undergo severe damage due to pressure generation alone at high impact velocities. There is evidence to show that these organs are viscoelastic, that the rate of loading is a crucial factor in injury causation, and that a compressive stress of 310kPa(45psi) will cause a superficial liver injury. Regarding dynamic response of the abdomen, the problem is complicated by the fact that there is a variety of surface geometries and component materials that can impact the abdominal area in a vehicle crash environment. In side impacts, however, the surface such as doors and armrests are somewhat well-defined, and dynamic load-deflection response curves do exist to a limited extent.
암묵 데이터를 활용한 인문학 인풋값과 다중 모달리티의 가중치 할당 방법에 관한 연구
이원태,강장묵 한국인터넷방송통신학회 2014 한국인터넷방송통신학회 논문지 Vol.14 No.4
이용자의 감성은 그 어느 때보다 기업, 정부 그리고 개인 간의 소통에서 중요한 변수로 인식된다. 특히 수많은 연구에서 이용자의 감성을 파악하는 방법으로 음성 톤, 속도, 얼굴 표정, 몸의 이동 방향과 속도, 제스쳐 등이 사용된다. 다중 모달리티는 단일의 모달리티보다 정확도가 높은 반면 멀티 센싱에 따른 인식률 한계와 데이터 처리 부하 그리고 센싱된 값을 추론하는 우수한 알고리즘이 요구된다. 즉 다중 모달리티는 각 모달리티의 개념, 속성이 상이하여 인간의 감성값이라는 표준화된 값으로 전환하는데 오류가 발생할 수 있다. 이 문제를 해결하기 위해 다중 모발리티 중 관계망 분석, 문맥 파악, 디지털 필터 등의 기술을 이용하여 이용자에게 우선 순위를 갖는 감성 표현 모달리티를 추출할 필요가 있다. 특정 상황에 우선 순위를 갖는 모달리티와 그 주변을 에워싼 다른 모발리티를 암묵 값으로 처리하면 감성 인식에 있어 컴퓨터 자원의 소비 대비 견고한 시스템을 구성할 수 있다. 본 연구 결과, 암묵 데이터를 활용하여 다중 모발리티 중 가중치를 어떻게 부여할지에 대하여 제안하였다. User's sensitivity is recognized as a very important parameter for communication between company, government and personnel. Especially in many studies, researchers use voice tone, voice speed, facial expression, moving direction and speed of body, and gestures to recognize the sensitivity. Multiplex modality is more precise than single modality however it has limited recognition rate and overload of data processing according to multi-sensing also an excellent algorithm is needed to deduce the sensing value. That is as each modality has different concept and property, errors might be happened to convert the human sensibility to standard values. To deal with this matter, the sensibility expression modality is needed to be extracted using technologies like analyzing of relational network, understanding of context and digital filter from multiplex modality. In specific situation to recognize the sensibility if the priority modality and other surrounding modalities are processed to implicit values, a robust system can be composed in comparison to the consuming of computer resource. As a result of this paper, it is proposed how to assign the weight of multiplex modality using implicit data.