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힘과 근접 감지 터치패드를 활용한 감성적 제스처 디자인
홍종기(Jonggi Hong),구지성(Jiseong Gu),이기혁(Geehyuk Lee) 한국HCI학회 2014 한국HCI학회 학술대회 Vol.2014 No.2
이 연구는 힘과 근접 감지가 가능한 터치패드를 활용하여 일상 생활에서 쓰이는 감성적 제스처를 인식하는 방법에 대한 연구이다. 기존의 터치패드와는 달리 힘 센서와 광학식 터치 감지 방식으로 근접 이미지를 얻을 수 있는 터치패드가 개발되어 왔으며, 이 장치를 활용할 때 가능한 상호작용 방법으로 감성적 제스처를 이용한 입력방식을 제안한다. 사용자에게 자유롭게 감성적 제스처를 사용할 수 있도록 하기 위해서 힘 값과 근접 이미지를 활용하여 얻을 수 있는 제스처의 특성을 탐색하였다. 그리고 제스처들의 특성과 기계학습 알고리즘을 활용하여 제스처를 정확하게 구분할 수 있는지 확인하였다. In this paper, a method to utilize emotional gestures that are used in daily life is investigated. While the traditional touchpad has provided only touch sensing, a new touchpad that detects the force of a touch and the proximity of a hand was developed. An emotional gesture is introduced in this paper as a method to utilize the new touchpad. In order to distinguish 6 emotional gestures, the features which can be derived from the force and proximity information of the gestures are explored. With the features, an experiment showed that a classification algorithm can correctly recognize the emotional gestures.
액체질소 내에서 뇌 임펄스전압에 대한 압력별 GFRP의 절연파괴 특성 분석
홍종기(Jonggi Hong),허정일(Jeong Il Heo),남석호(Seokho Nam),강형구(Hyoungkul Kang) 대한전기학회 2012 전기학회논문지 Vol.61 No.10
A study on the dielectric characteristics of the Glass Fiber Reinforced Plastic (GFRP) is important for designing a reliable high voltage superconducting machines such as transmission superconducting fault current limiters, superconducting cables, and superconducting transformers. In this paper, dielectric experiments of the GFRP under lightning impulse voltage are conducted in liquid nitrogen(LN₂) according to various experimental conditions such as the thicknesses of the GFRP, the diameters of electrode systems and the pressures. The dielectric characteristics of the GFRP are analyzed by using a Finite Elements Method(FEM) according to various field utilization factors. It has been reported that the electrical insulation design of the GFRP would be conducted by considering the mean electric field intensity(Emean) distributed inside the GFRP. In this study, it is found that the dielectric performance of the GFRP could be explained by not only Emean but also the maximum electric field intensity (Emax). Finally, the empirical formulae of the GFRP to estimate an electrical breakdown voltage at sparkover under the lightning impulse condition are deduced. It is expected that the presented experimental results in this paper are helpful to design electrically reliable high voltage superconducting machines using the GFRP as an insulation material.
비용 효율이 높은 24kV급 고압배전반 개발을 위한 Bus Bar 사이즈에 따른 전·자기 손실 특성 분석
홍종기(Jonggi Hong),허정일(Jeong Il Heo),남석호(Seokho Nam),강형구(Hyoungku Kang) 대한전기학회 2012 전기학회논문지 P Vol.61 No.4
The analysis on the bus bar effect is conducted to develop a cost effective 24kV/2,000A switchgear. The temperature enclosures and bus bars could rise due to several heat sources such as eddy current losses and copper losses. Therefore, a study on the characteristics of the electric field intensity and electromagnetic loss according to the bus bar size in a bus bar compartment is essential to design a electrically reliable high voltage switchgear. It is investigated that the electromagnetic influence to the temperature rising and the dielectric stability according to various bus bar sizes by using finite element method(FEM). The electric field intensity and electromagnetic loss according to various bus bar sizes are calculated to design a reliable and a high voltage switchgear. As results, it is found that the electromagnetic loss and the dielectric stability of bus bar could be determined by a bus bar size. It means that a cost effective 24kV/2,000A high voltage switchgear could be developed by selecting the proper size of a bus bar. Also, it is recognized that the electromagnetic characteristics according to various bus bar sizes in order to design an electrically stable high voltage switchgear when the enclosure size is determined as a fixed value. Futhermore, studies on the various nominal voltage class and bus bar sizes will be conducted to develop a cost effective high voltage switchgear.
고압배전반의 전기적 안정성 향상을 위한 버스바의 배치기법에 따른 전자기 특성에 관한 연구
남석호,허정일,홍종기,강형구,Nam, Seokho,Heo, Jeong Il,Hong, Jonggi,Kang, Hyoungku 한국전기전자재료학회 2013 전기전자재료학회논문지 Vol.26 No.3
The rated voltage has been rising in order to minimize the losses in power transmission. The high voltage electric machines should be minimized due to the constraints of space. Therefore, the temperature of high voltage electric apparatuses easily exceeds the temperature limits. In this paper, it is investigated that how to minimize the internal temperature rising of a high voltage switchgear by adjusting the arrangement of bus bars. High voltage switchgears consist of a circuit breaker, a CT, a PT, a earthing switches, bus bars, and so on. It is very difficult to estimate the electromagnetic properties of a high voltage switchgear due to these various environments and structures. In this paper, analyses are focused on the electromagnetic characteristics of bus bars according to the arrangement method and the enclosures to simplify the electromagnetic characteristics of a switchgear. It is found that the characteristics of electric field intensity and electromagnetic losses in bus bars are influenced by the arrangement method of bus bars. However, it is confirmed that the electromagnetic characteristics of enclosures are not affected by the arrangement of bus bars. In this paper, the arrangement methods of bus bars to minimize the electric field intensity and electromagnetic losses are suggested. It is expected that the research results are helpful to design and develop an electrically reliable high voltage switchgear.
24kV급 배전반의 외함재질과 두께에 따른 Bus bar와 외함의 전자기 손실특성 분석
허정일(Jeong Il Heo),홍종기(Jonggi Hong),강형구(Hyoungku Kang) 대한전기학회 2013 전기학회논문지 P Vol.62 No.4
This paper deals with the electromagnetic loss characteristics of enclosures for a 24kV high voltage switchgear by using a finite element method (FEM). A study on the electromagnetic characteristics of enclosures for a high voltage switchgear should be conducted to minimize the size and the temperature rising of a switchgear. Generally, the enclosures made by stainless steel are used to minimize the eddy current loss caused by the transporting current in Bus bars due to its non-magnetic characteristics although the price of stainless steel is expensive compared with other metal for enclosures. Therefore, a switchgear made by stainless steel enclosures could be fabricated as a small size and are applied to a switchgear in urban substations. On the contrary, the switchgear enclosures made by steel could be fabricated with relatively cheap manufacturing price. However, the temperature easily rises due to the transporting current in Bus bars because steel is a ferromagnetic material. Therefore, the size of a switchgear made by steel enclosures is relatively massive and installed in rural substations. In this paper, the electromagnetic losses in the enclosures of a switchgear according to various enclosure thicknesses are calculated and compared with each other. Especially, we proposed a hybrid type enclosures for a switchgear made by stainless steel (top and bottom enclosure) and steel (left and right enclosure). It is concluded that the cost electromagnetic performance of applying the hybrid type enclosure is favorable to develop a high voltage switchgear.
마우스 클러칭 움직임 관찰 및 이를 기반으로 한 마우스 호버 제스처 디자인
하석현(Seukhyun Ha),홍종기(Jonggi Hong),이기혁(Geehyuk Lee) 한국HCI학회 2014 한국HCI학회 학술대회 Vol.2014 No.2
마우스는 기본적으로 2 차원 평면내의 변위 정보만 이용하고 z 축 방향의 움직임 정보는 이용하지 않는 입력장치다. 그러나 GUI 의 계층적 구조를 고려하면 z 축 방향으로의 마우스 움직임이 잘 활용 될 수 있을 것으로 기대한다. 2 차원 이상의 마우스의 자유도를 활용하는 이전 연구에서는 z 방향으로의 움직임을 이용하지는 않았다. 이는 마우스 클러칭 조작과의 충돌때문인 것으로 생각된다. 클러칭을 위한 움직임과 의도적인 z 방향으로의 움직임이 구분될 수 있다면 마우스의 z 축 방향 자유도를 GUI 조작에 활용할 수 있을 것으로 기대한다. 따라서 본 연구에서는 먼저 사용자들의 마우스 클러칭 조작을 관찰하였다. 그리고 이 관찰 결과를 바탕으로 z 축 방향의 활용 가능성을 찾고, 이를 기반으로 어플리케이션 사례를 구현하였다. Basically, a mouse uses information of displacement in 2-dimension and does not use information of z-axis. However, when we consider the hierarchical structure of GUI, it is expected that movement information of z-axis is applicable in beneficial way. Until now, There haven’t been a research using z-axis in research using degree of freedom of mouse bigger than 2-dimension. It’s guessed that it’s because of conflict with clutching. If clutching and intentional movement in z-axis can be separated, mouse can use the information of z-axis in operating GUI. So, in this research, users’ mouse clutching is observed and then an application is applied which can be executed by using mouse movement in z-axis.