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A review of smart manufacturing reference models based on the skeleton meta-model
Soonhung Han 한국CDE학회 2020 Journal of computational design and engineering Vol.7 No.3
Standards will allow interoperability among stakeholders in the upcoming super-connected world. A smart manufacturing reference model (SMRM) is under development inside JWG21 between ISO and IEC. Based on a dimensionality analysis and the skeleton meta-model, the eight proposed SMRMs are reviewed and compared. The SMRMs are classified according to the number of lifecycle axes and the number of dimensional axes. Also, how the concept of a digital twin can be accommodated in an SMRM is investigated.
An alternative method for smartphone input using AR markers
Kang, Yuna,Han, Soonhung Society for Computational Design and Engineering 2014 Journal of computational design and engineering Vol.1 No.3
As smartphones came into wide use recently, it has become increasingly popular not only among young people, but among middle-aged people as well. Most smartphones adopt capacitive full touch screen, so touch commands are made by fingers unlike the PDAs in the past that use touch pens. In this case, a significant portion of the smartphone's screen is blocked by the finger so it is impossible to see the screens around the finger touching the screen; this causes difficulties in making precise inputs. To solve this problem, this research proposes a method of using simple AR markers to improve the interface of smartphones. A marker is placed in front of the smartphone camera. Then, the camera image of the marker is analyzed to determine the position of the marker as the position of the mouse cursor. This method can enable click, double-click, drag-and-drop used in PCs as well as touch, slide, long-touch-input in smartphones. Through this research, smartphone inputs can be made more precise and simple, and show the possibility of the application of a new concept of smartphone interface.
A CAD Client on a Smart Device with Drag-type Buttons
Yuna Kang,Soonhung Han (사)한국CDE학회 2013 한국CAD/CAM학회 국제학술발표 논문집 Vol.2010 No.8
Smart devices were developed and widely used recently, so it has been applied in the industrial field. If the mobile technology is applied to the CAD field, the user can get many advantages such as high mobility and ease of collaboration also. For developing a feature-based CAD system available on smart devices, we suggested a system using multi-touch inputs in 2012, which was a stand-alone system available without network. But it cannot be created complex shapes itself, because of the absence of the modeling kernel for the mobile platform and low computing power of smart devices. To solve this problem, this study proposed a client-server system for smart device CAD. When modeling commands are created from drag-type buttons, on each step, the analyzed modeling commands are sent to the server, the server creates the model and sends it to the smart device, then the smart device visualizes the modeling result. This system can make more complex models than the existing system. This study compared the developed system with the existing system for verifying the usability of the smart device CAD, and further, also suggested how to extend this system to the collaborative system. This smart device CAD system can increase the mobility and cooperativity of the CAD system.