• Journal of applied mathematics & informatics
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• v.30 no.3_4
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• pp.395-411
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• 2012

Several methods with order higher than that of Newton methods which are of order 2 have been reported in literature for solving nonlinear equations. The focus of most of these methods was to economize on/minimize the number of function evaluations per iterations. We have demonstrated here that there are several computational pit-falls, such as the violation of fixed-point theorem, that one could encounter while using these methods. Further it was also shown that the overall computational complexity could be more in these high-order methods than that in the second-order Newton method.

• IEIE Transactions on Smart Processing and Computing
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• v.4 no.1
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• pp.28-34
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• 2015

Several parallelization methods that can be applied to High Efficiency Video Coding (HEVC) decoders are evaluated. The market requirements of high-resolution videos, such as Full HD and UHD, have been increasing. To satisfy the market requirements, several parallelization methods for HEVC decoders have been studied. Understanding these parallelization methods and objective comparisons of these methods are crucial to the real-time decoding of high-resolution videos. This paper introduces the parallelization methods that can be used in HEVC decoders and evaluates the parallelization methods comparatively. The experimental results show that the average speed-up factors of tile-level parallelism, wavefront parallel processing (WPP), frame-level parallelism, and 2D-wavefront parallelism are observed up to 4.59, 4.00, 2.20, and 3.16, respectively.

• Journal of Engineering Education Research
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• v.20 no.2
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• pp.31-38
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• 2017

In this study, specific teaching methods of lecturing and improved discussion methods (combining discussion and problem-based learning) were selected and applied for each major subject and learning content area in the fields of engineering, language, and social sciences. Then, the selected teaching methods were examined to determine the most effective learning contents. Finally, in order to determine the most effective teaching methods, a survey on student satisfaction was analyzed statistically. The results showed that students preferred teaching methods that combine lectures and improved discussion methods to the traditional method of only lectures. Therefore, this research proposes the combined teaching method for each major subject and learning content area.

• Proceedings of the KSME Conference
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• 2004.11a
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• pp.208-213
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• 2004

Methods for estimation of the effective stress intensity factor range (${\Delta}K_{eff}$) are evaluated for narrow and wide band random loading crack growth test data of 2024-T351 aluminum alloy. Three methods of determining $K_{op}$, visual measurement, ASTM offset compliance method, and the neural network method proposed by Kang and Song, and three methods of estimating ${\Delta}K_{eff}$, conventional, the 2/PI0 and 2/PI methods proposed by Donald and Paris, are compared in a quantitative manner by using the results of fatigue crack growth life prediction under random loading. For all $K_{op}$ determination methods discussed, the 2/PI0 and 2/PI methods of estimating ${\Delta}K_{eff}$ provide better results than conventional method for narrow and wide band random loading data.

• Korean Management Science Review
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• v.11 no.3
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• pp.1-11
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• 1994

Recent advances in linear programming solution methodology have focused on interior point methods. This powerful new class of methods achieves significant reductions in computer time for large linear programs and solves problems significantly larger than previously possible. These methods can be examined from points of Fiacco and McCormick's barrier method, Lagrangian duality, Newton's method, and others. This study presents a primal-dual log barrier algorithm of interior point methods for linear programming. The primal-dual log barrier method is currently the most efficient and successful variant of interior point methods. This paper also addresses a Cholesky factorization method of symmetric positive definite matrices arising in interior point methods. A special structure of the matrices, called supernode, is exploited to use computational techniques such as direct addressing and loop-unrolling. Two dense matrix handling techniques are also presented to handle dense columns of the original matrix A. The two techniques may minimize storage requirement for factor matrix L and a smaller number of arithmetic operations in the matrix L computation.

• Korean Journal of Human Ecology
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• v.23 no.5
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• pp.941-955
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• 2014

A price discount is one of the effective marketing means to get business profitability in a short period of time. Recently most of the foodservice enterprises in our country utilize a variety of discount methods such as affiliated cards, point cards, discount coupons, social commerce and/or event discount as their marketing strategy. Therefore, this research aimed to investigate customer satisfaction about discount methods provided by the foodservice industry and explore the moderate effect of the discount methods between customer satisfaction and loyalty. For data collection, both of online and offline questionnaire surveys were carried out, and a total of 871 responses were analyzed. As results, the respondents showed high satisfaction with the discount methods, and the discount methods had a positive moderate effect between customer satisfaction and loyalty.

• Proceedings of the Korean Society of Agricultural Engineers Conference
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• 2003.10a
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• pp.111-114
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• 2003

Due to the increasing interest in preserving environment, many environmentally friendly canal consolidation methods has been developed. Those methods, however, tend to focus more on the scenery than on the control of water. Thus, the safety of such methods are need to be studied more profoundly. In this study, the hydraulic examination of applied environmentally friendly methods using HEC-RAS model considering roughness coefficient and shear force in a canal is done to present the hydraulic safety of each methods. Further more, vegetations distribution characteristics and maintenance methods of channel are investigated.

• Journal of the Korean Home Economics Association
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• v.47 no.4
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• pp.1-10
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• 2009

Origami’s formative characteristics have been used in modern fashion design usefully. This article categorized origami expression methods by making technique as three category; producing methods, organized principles and expressive characteristics. And then, this article argued characteristics of fashion design used origami expression methods. Fashion design using origami expression methods had three characteristics; basic tailoring, decorative surface, fluidity & rhythm. The proceeding article on paper folding argued formative aspects of paper folding widely, while this study focused on origami’s basic expression methods in detail and clarified characteristics of fashion design used origami. This article’s originality existed in that point. And also a result of this study would be regarded as a important sources in design processing of fashion design.

• The Journal of the Acoustical Society of Korea
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• v.16 no.1E
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• pp.3-8
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• 1997

Three new classification methods for multi temporal images are proposed. They are named as a likelihood addition method, a likelihood majority method and a Dempster-Shafer's rule method. Basic strategies using these methods are to calculate likelihoods for each temporal data and to combine obtained likelihoods for final classification. These three methods use different combining algorithms. From classification experiments, following results were obtained. The method based on Dempster-Shafer's rule of combination showed about 12% improvement of classification accuracies compared to a conventional method. This method needed about 16% more processing times than that of a conventional method. The other two proposed method showed 1% to 5% increase of classification accuracies. However processing times of these two proposed method showed 1% to 5% increase of classification accuracies. However processing times of these two methods are almost the same with that of a conventional method. Among the newly proposed three methods, the Dempster-Shafer's rule method showed the highest classification accuracies with more processing time than those of other methods.

• Journal of Industrial Technology
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• v.34
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• pp.3-9
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• 2014

As importance of quality control in corporate environments is increasing, new methods for quality control have been suggested by various researchers. Based on gamification theory, this study suggests a new method for quality control. Firstly, this paper defines three problems of quality control that can be easily faced with in corporate environments. Secondly, three gamification methods aiming quality improvement are suggested. Finally, a survey is provided to prove the effect of the suggested gamification methods. Comparing the suggested gamification methods with the existing quality control methods, this study found that the suggested gamification methods could improve the level of quality control.