En Sup Yoon

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The development of real educational content and customized virtual education systems satisfying the needs of a specific engineering education domain is getting more and more research attention in this era of ubiquitous Web and virtual technologies. By analyzing the characteristics of computer-based educational methods and adopting the rapidly changing(More)
The development of the real educational contents and customized virtual education systems satisfying the needs of specific engineering education domain is getting more and more research attention in this era of Web and virtual technologies. By analyzing the characteristics of computer-based educational methods and using the rapidly changing Internet and(More)
— This paper presents iterative learning control (ILC) schemes for batch-varying references. Generally, reference or target trajectory must be identical for all iterations to implement the ILC. However, references can be changed in dynamic systems such as robotics and chemical processes according to cycle or batch. ILC schemes for batch-varying references(More)
Maintaining the best quality is essential for the survival of a company in a globally competitive world. Six Sigma activity has been widely accepted as one of the most efficient and powerful problem-solving methods for quality issues. The define-measure-analyze-improve-control (DMAIC) approach based on data has been very powerful for identifying, defining,(More)
In this paper, we developed a fault diagnosis model based on signed digraph(SDG), support vector machine(SVM) and improved principal component analysis(PCA) method. In PCA, we set linear fault boundaries. By means of the system decomposition based on SDG, the local models of each measured variable are constructed and more accurate and fast models are using(More)
An end point detection algorithm for small area etching was developed using the modified principal component analysis. Because the traditional end point detection techniques used a few manually selected wavelength, noise render them ineffective easily. And it is hard to select the important wavelength when the open area gets small. Modified principal(More)
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