• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1986년도 한국자동제어학술회의논문집; 한국과학기술대학, 충남; 17-18 Oct. 1986
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• pp.83-85
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• 1986

The error differential equations which are derived by using the first error model are uniformly asymptotial stable if the input is bounded and sufficiently rich. In the adaptive control, the speed of convergence of system output or parameter error in such cases is of both practical and theoretical interest. In this paper, the adaptive algorithms(Gradient algorithm, Intergral algorithm) are discussed from the point of view of speed convergence and the modification of adaptive law for prohibition of overadaptation is discussed. The result is compared among this algorithms and the adaptive gain is choosed by this result(the speed of convergence).

• Communications for Statistical Applications and Methods
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• 제7권3호
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• pp.789-798
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• 2000

The mean residual function is the expected remaining life of an item at age x. The problem of trend change in the mean residual life is great interest in the reliability and survival analysis. In this paper, we develop a family of test statistics for testing whether or not the mean residual life changes its trend. The asymptotic normality of the test statistics is established. Monte Carlo simulations are conducted to study the performance of our test statistics.

• 대한수학교육학회지:학교수학
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• 제1권2호
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• pp.451-459
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• 1999

The teaching through the graphics in the newspaper which students look at easily, will encourage the student's interest and make them learn the principle of representing the statistics graphics. In this paper, we analyzed the cases of the bar chart and the graph of broken lines which is seen many in the newspaper. Through showing the good point and fault of the graphic cases, we intend that students know the principle of analyzing or making the statistics graphics.

• International Journal of Fuzzy Logic and Intelligent Systems
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• 제13권4호
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• pp.284-290
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• 2013

Feature detection is very important to image processing area. In this paper we compare and analyze some characteristics of image processing algorithms for corner and blob feature detection. We also analyze the simulation results through image matching process. We show that how these algorithms work and how fast they execute. The simulation results are shown for helping us to select an algorithm or several algorithms extracting corner and blob feature.

• 컴퓨터교육학회논문지
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• 제22권1호
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• pp.11-20
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• 2019

소프트웨어(SW)의 영향력이 확산되면서 세계 주요국들은 SW 교육 정책과 더불어 여성을 위한 SW 교육 프로젝트에 힘을 쏟고 있다. 국내에서도 2015 개정 교육과정이 적용됨에 따라 SW 교육이 강화되고 있지만, 그럼에도 여성의 적성과 성향에 맞는 교육과정에 대한 연구는 미비한 편이다. 본 연구는 성별에 따른 SW 인식 차이를 조사하기 위해 중학생 422명을 대상으로 설문조사를 진행하였다. 조사 대상은 남학생 207명(49.1%) 및 여학생 215명(50.9%)으로 구성되었고, SW 환경, SW 교육 인식도, SW 진로 관심도 세 가지 범주로 구분하여 비교 분석하였다. 분석 결과, 여학생의 자신감과 흥미도를 높일 수 있는 SW 교육이 필요함을 알 수 있었고, SW 교육 기회를 확대하여 정보 수업에 대해 관심과 기대를 높이도록 노력해야 함을 알 수 있었다. 또한 SW 관련 직업과 SW 계열 전공 진학에 대한 관심도를 높이기 위하여 SW 관련 진로에 대한 소개 및 홍보가 필요한 것으로 나타났다. 본 연구는 개정 교육과정이 적용되기 시작하는 현 시점에서 성별에 따른 정보 과목 인식 차이가 있음을 보이고, 효과적인 성취를 위하여 성별에 따른 SW 교육과정 연구의 필요성을 규명했다는 점에서 의의를 지닌다.

• 대한가정학회지
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• 제20권2호
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• pp.135-140
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• 1982

As a step preliminary to the factor-analysis of a child-rearing attitude scale under construction, its preliminary form containing a total of 368 self-answered questions was administerd to 88 married women with one or more children in the grade school age. all graduates of colleges and in possession of a home telephone and a house, twice from one week apart. The test-retest correlation coefficients, calculated for each test item based on the subject's choice among the three response alternatives on two test ocasions, ranged from .80 to .10. The cut-off point of r=.41 or lower led to the elimination of 48 items. As a point of incidental interest, the rate of response concordance. The namber of subjects giving the same categroy response on two occasions was calculated for each item and it was correlated with its test. retest correlation coefficient. The two different indices of item test-retest reliability were found not related to each other. Empirical evidence, as well as rational justifications, was presented to show that the correlation coefficient is the better of the tow indices of item test-retest reliability.

• Journal of the Korean Society for Industrial and Applied Mathematics
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• 제15권2호
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• pp.83-96
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• 2011

This work proposes a binomial method for pricing the cliquet options, which provide a guaranteed minimum annual return. The proposed binomial tree algorithm simplifies the standard binomial approach, which is problematic for cliquet options in the computational point of view, or other recent methods, which may be of intricate algorithm or require pre- or post-processing computations. Our method is simple, efficient and reliable in a Black-Scholes framework with constant interest rates and volatilities.

• International journal of advanced smart convergence
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• 제8권3호
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• pp.145-150
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• 2019

Due to the development of science and technology and the emergence of new industries, the environmental change of the digital contents industry is rapidly progressing. The scope of technological development in the digital contents industry is affecting not only the entertainment industry but also various industries. Recently, with the development of digital convergence using realistic content, games, video, and VR have provided new opportunities for the growth of the content industry. The researcher determined that a new education system would need to be changed as the digital contents industry developed. For this purpose, an AHP questionnaire was conducted for experts with a high basic understanding of the education platform based on previous studies. We proposed a platform model for human resource development as an education system that meets the demand of digital contents industry. The education system for nurturing talents needed by future society should include elements that can interest the learning of users. The platform should not be approached from a system point of view, but should be developed from the content and user's point of view, considering the platform's original purpose.

• Journal of Information Processing Systems
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• 제12권1호
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• pp.83-99
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• 2016

The latest research on the image-based fingerprint matching approaches indicates that they are less complex than the minutiae-based approaches when it comes to dealing with low quality images. Most of the approaches in the literature are not robust to fingerprint rotation and translation. In this paper, we develop a robust fingerprint matching system by extracting the circular region of interest (ROI) of a radius of 50 pixels centered at the core point. Maximizing their orientation correlation aligns two fingerprints that are to be matched. The modified Euclidean distance computed between the extracted orientation features of the sample and query images is used for matching. Extensive experiments were conducted over four benchmark fingerprint datasets of FVC2002 and two other proprietary databases of RFVC 2002 and the AITDB. The experimental results show the superiority of our proposed method over the well-known image-based approaches in the literature.

• 한국멀티미디어학회논문지
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• 제25권2호
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• pp.421-431
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• 2022

The purpose of this research is to determine the point of fixation of the driver during the process of driving. Based on the results of this research, the driving instructor can make a judgement on what the trainee stare on the most. Traffic accidents have become a serious concern in modern society. Especially, the traffic accidents among unskilled and elderly drivers are at issue. A driver should put attention on the vehicles around, traffic signs, passersby, passengers, road situation and its dashboard. An eye-tracking-based application was developed to analyze the driver's gaze behavior. It is a prototype for real-time eye tracking for monitoring the point of interest of drivers in driving practice. In this study, the driver's attention was measured by capturing the movement of the eyes in real road driving conditions using these tools. As a result, dwelling duration time, entry time and the average of fixation of the eye gaze are leading parameters that could help us prove the idea of this study.