• Journal of The Korean Association of Information Education
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• v.22 no.5
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• pp.557-564
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• 2018

As promotion of the 3D printer supply policy, need for 3D printer education is emphasized. But it is few that study of 3D printing educational program teachers can utilize at school. Especially study of CAD SW is very urgent because most of the CAD SW for 3D modeling is difficult and expensive. So in this study, we examine the CAD SW for educational purposes and propose educational programs that can be used at primary school. The instructional model is called "MDIAP" which consists of five stages : Motivation, Demonstration, Imitation, Application, Presentation. Instructional process is consisted of performing tasks and projects. We expect to enhance the function of 3D modeling and creative thinking which is essential to the Fourth Industrial Revolution society.

• Proceeding of EDISON Challenge
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• 2015.03a
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• pp.512-513
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• 2015

• Journal of Korea Multimedia Society
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• v.2 no.4
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• pp.476-489
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• 1999

HW/SW codesign is integrated design of systems implemented using both hardware and software components. Many design tools has been developed to support this new paradigm, so far. Current codesign tools are not widely used as been expected because of variety problems - rapidly evolving technology, platform dependency, absence of standard specification method, inconsistent user interface, varying target system, different functionality In this paper, we propose a web-based distributed HW/SW codesign environment to remedy this kinds of problem. Our codesign environment has object-based 3 tier client/server architecture. It supports collaborative workspace through session service. Fully object-oriented design of user interface(OOUI) enables easy extension without change of user Interface. Furthermore it contains transaction server and security server for efficient and safe transfer of design data. To show a validity of our design, we developed prototype of web-based HW/SW codesign environment called WebCEDA. Our model of HW/SW codesign can be used for web-based generic CAD tools.

• 한국지형공간정보학회:학술대회논문집
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• 2001.11a
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• pp.87-90
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• 2001

• Proceeding of EDISON Challenge
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• 2015.03a
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• pp.538-540
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• 2015

In this paper, We have conducted a Compact SELCA-Rod design by using FreeCAD. FreeCAD is many modern design applications such as Revit or CATIA. It is based on the concept of Workbench. A Workbench can be considered as a set of tools specially grouped for a certain task. Also It has an extensive list of features FreeCAD implements. We use this practical tool and proceed the research on Compact SELCA-Rod which is attracted the most IT-related products in 2014. SELCA-Rod is mostly based on rod-shaped form as in name. However rod-shaped design has the biggest problem for mobile Through this research, We propose a new type of SELCA-Rod. It is easy to carry and take pictures from different angle.

• Proceeding of EDISON Challenge
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• 2015.03a
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• pp.541-542
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• 2015

Recently, a popularity of the smartphone is on the rise. And also related services are being created. The growth of the smart technology makes advanced equipment for smartphone accessories. Selfie-rod is one of them. Selfie-rod satisfies people who want to take their own picture at long distance. However, the weight of recent selfie-rods is too heavy that has nice functions. So, we have re-designed new selfie-rod that has light-weight body. First, we observed a selfie-rod and check the reason of the selfie-rod's high weight. The new selfie-rod has a shell and inside, there is a space that it can be light-weight. The shell and space make the selfie-rod lighter. In FreeCAD, we designed shell with a rotation function. Finally, we designed light-weight body selfie-rod with FreeCAD. FreeCAD can be used easily for beginners of CAD. FreeCAD is suitable 3D-design tool for era of 3D-printing.

• Proceeding of EDISON Challenge
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• 2015.03a
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• pp.452-459
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• 2015

Thanks to the development of applications, many people are using a smart phone cradle these days. But it has some problems. First of all, it is hard to fix on automobiles. Also, it is vulnerable to external vibration. Recognizing these problems, we decided to improve this device by using FreeCAD and ANSYS. Because FreeCAD is newly invented software, we used another 3D modeling software to cover shortages of tools in FreeCAD. Also, we used famous analysis software 'ANSYS' to analyze bending deformation, modal analysis, and harmonic analysis.

• Proceeding of EDISON Challenge
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• 2015.03a
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• pp.428-441
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• 2015

Corresponding to the high consumption rate of the selfie stick for cell phone camera, the design of the product is becoming diverse. However, relatively low cost selfie stick models are not strong enough to stand the weight of the cell phone. This results into a bending of the stick or the accidental fall of the cell phone by the failure of the holding unit. As a solution to the problem, design of selfie stick that is structurally strong enough to stand the weight of the cell phone with the minimum weight for the portability is proposed in this paper.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.25 no.2
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• pp.117-131
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• 2007

Representation of building internal space is an active research area as the need for more geometrically accurate and visually realistic increases. 3 dimensional representation is common ground of research for disciplines such as computer graphics, architectural design and engineering and Geographic Information System (GIS). In many cases CAD plans are the starting point of reconstruction of 3D building models. The main objectives of building reconstruction in GIS applications are visualization and spatial analysis. Hence, CAD plans need to be preprocessed and edited to adapt to the data models of GIS SW and then georeferenced to enable spatial analysis. This study automated the preprocessing of CAD data using AutoCAD VBA (Visual Basic Application), and the processed data was topologically restructured for further analysis in GIS environment. Accuracy of georeferencing CAD data was also examined by comparing the results of coordinate transformation by using digital maps and GPS measurements as the sources of ground control points. The reconstructed buildings were then applied to visualization and network modeling.

• Proceeding of EDISON Challenge
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• 2015.03a
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• pp.488-490
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• 2015

In this paper, the selfie stick which can involved in small bag is designed to make easier and smaller. Model the diameter of the selfie to achieve light weight for the fixed length using FreeCAD. After modeling, check durability using 'Netgen' and 'Calculix'.