• The Journal of the Acoustical Society of Korea
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• v.27 no.3E
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• pp.95-103
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• 2008

In this paper, the new hybrid adaptive Volterra filter was proposed to be applied for compensating the nonlinear distortion of memoryless nonlinear systems with saturation characteristics. Through computer simulations as well as the analytical analysis, it could be shown that it is possible for both conventional Volterra filter and proposed hybrid Volterra filter, to be applied for linearizing the memoryless nonlinear system with nonlinear distortion. Also, the simulations results demonstrated that the proposed hybrid filter may have faster convergence speed and better capability of compensating the nonlinear distortion than the conventional Volterra filter.

• The Journal of the Acoustical Society of Korea
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• v.28 no.1E
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• pp.16-22
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• 2009

In this paper, the new robust active noise controller was proposed to be applied for attenuating the noises when the nonlinear distortion in the secondary path exists. Through computer simulations as well as the analytical analysis, it could be shown that it is possible for both conventional LMS controller and proposed controller, to be applied for actively controlling the noises and linearizing the nonlinear distortion in the secondary path. Also, the simulations results demonstrated that the proposed controller may have faster convergence speed and better capability of controlling the noises and compensating the nonlinear distortion than the conventional LMS controller.

• Journal of Digital Convergence
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• v.10 no.9
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• pp.89-100
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• 2012

This study is designed to explore whether the integration of product development and quality management have influence on the success of localization of weapon system. To that end, empirical analysis has been conducted on a total of 110 systematic major defense contractors, their subcontractors and small-and-medium sized defense contractors. The result shows that success of the localization of weapons system, as well as the price of localization, manufacturing time, and quality turn out to have significantly influenced by factors of quality management capabilities including human resources development capability, organizational capability and process capability and R&D development factors including human resources capabilities, capability to accumulate technology and internal/external collaborative capabilities. To sum up, this study suggests that integration of quality management and product development continuously provides a competitive strength in developing new product by a non-defense company as well as localization of core parts of weapon system.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2019.05a
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• pp.372-374
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• 2019

Recent college education in the face of the Fourth Industrial Revolution highlights problem-solving skills or creativity over the passing of professional knowledge. In addition, the need for convergence education is growing further as high-tech information and communication technologies are converging to create innovative changes. In this study, after IT convergence education was conducted and after general convergence education was conducted, the difference in creative problem solving capabilities was compared and analyzed. The study found that students who received IT convergence education had higher creative problem solving capabilities than general convergence education, and showed a statistically significant difference. In order to foster creative problem-solving skills, universities will need to promote IT convergence education in various courses.

• The Journal of the Convergence on Culture Technology
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• v.4 no.2
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• pp.27-31
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• 2018

Employing financial knowledge, financial attitude, and financial action as the proxy for financial capability, we investigates whether there is any mean-difference by gender and marriage. The estimation results are as follows: first, the married women have the lowest financial knowledge among four groups especially in general financial knowledge. Second, there is the mean-difference between married women and the other groups in investment horizon and self-assessment for investment ability. Third, the fund performance of married women is the lowest compared with the other groups. The findings imply that the financial capability of married women is the lowest among four groups.

• Structural Engineering and Mechanics
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• v.73 no.1
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• pp.1-16
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• 2020

Finite elements based on the partition of unity (PU) approximation have powerful capabilities for p-adaptivity and solutions with high smoothness without remeshing of the domain. Recently, the PU approximation was successfully applied to the three-node shell finite element, properly eliminating transverse shear locking and showing excellent convergence properties and solution accuracy. However, the enrichment with the PU approximation results in a significant increase in the number of degrees of freedom; therefore, it requires greater computational cost, thus making it less suitable for practical engineering. To circumvent this disadvantage, we propose a new strategy to decrease the total number of degrees of freedom in the existing PU-based shell element, without loss of optimal convergence and accuracy. To alleviate the locking phenomenon, we use the method of mixed interpolation of tensorial components and perform convergence studies to show the accuracy and capability of the proposed shell element. The excellent performances of the new shell elements are illustrated in three benchmark problems.

• Journal of the Korea Convergence Society
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• v.7 no.4
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• pp.123-131
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• 2016

In this paper, we discussed learner's capability enhancement education suitable for the age of artificial intelligence (AI) using game analysis and archival research based on the 2016 Google Deepmind Challenge match between AI that possessed the finest deep neural networks and the master Baduk player that represented the best of the human minds. AlphaGo was a brilliant move that transcended the conventional wisdom of Baduk and introduced a new paradigm of Baduk. Lee Sedol defeated AlphaGo via the 'divine move and Great idea' that even AlphaGo could not have calculated. This was the triumph of human intuition and insights, which are deeply embedded in human nature as well as human courage and strength. Convergence science education that cultivates student abilities that can help them control machines in the age of AI must be in the direction of developing diverse human insights and positive spirits embedded in human nature not possessed by AI via implementing hearts-on experience and topophilia education obtained from the nature.

• Journal of the Korea Convergence Society
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• v.6 no.5
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• pp.241-248
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• 2015

Nursing clinical practice, especially because it is required to reproduce this fusion education is very urgent. This Study was done to examine the effect of action learning techniques in simulation class. The study was designed using a nonequivalent control group pretest-posttest design. The participants consisted of control group 92, experimental group 92. The data analyzed using SPSS 18.0 program. Professional self-concept are higher than in the control group were measured.(t=-5.118, p=>.001). communication competence and self-directed learning capability of experimental group increased significantly from those control group. This result means that can help to significantly improve the professional nursing students learning techniques to simulate the application of an action class. In other words, if the act of creative training techniques such as future action learning hands-on training to be a big help.

• The Journal of the Convergence on Culture Technology
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• v.6 no.2
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• pp.263-270
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• 2020

Recently, the necessity of education for developing the capability to create new knowledge and creatively solve problems through cooperation and integration with various disciplines is increased. And a lot of universities carry out software capability education to bring up talents capable of creative fusion with other major and software knowledge. To bring up talents capable of creative fusion through software education for non-computer majors, it is important for learners to develop ability to solve problems by using and applying various knowledge for themselves. Therefore, this study explores the possibility of convergence between software and learner's major fields by analyzing software projects made by non-computer major freshmen through software class and the results of pre-post surveys of the class and proposes the future direction of software education for them.

• ETRI Journal
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• v.31 no.6
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• pp.688-694
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• 2009

In this paper, we present the results of a preliminary study on the piezoelectric energy harvesting performance of a Zr-doped $PbMg_{1/3}Nb_{2/3}O_3-PbTiO_3$ (PMN-PZT) single crystal beam. A novel piezoelectric beam cantilever structure is used to demonstrate the feasibility of generating AC voltage during a state of vibration. The energy-harvesting capability of a PMN-PZT beam is calculated and tested. The frequency response of the cantilever device shows that the first mode resonance frequency of the excitation model exists in the neighborhood of several hundreds of hertz, which is similar to the calculated value. These tests show that several significantly open AC voltages and sub-mW power are achieved. To test the possibility of a small scale power source for a ubiquitous sensor network service, energy conversion and the testing of storage experiment are also carried out.