• KIPS Transactions on Software and Data Engineering
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• v.4 no.7
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• pp.291-296
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• 2015

In this paper, we propose a new confidence measure using pixel selection for eye detection and design a hybrid eye detector. For this, we produce sub-images by applying a pixel selection method to the eye patches and construct the BDA(Biased Discriminant Analysis) feature space for measuring the confidence of the eye detection results. For a hybrid eye detector, we select HFED(Haar-like Feature based Eye Detector) and MFED(MCT Feature based Eye Detector), which are complementary to each other, as basic detectors. For a given image, each basic detector conducts eye detection and the confidence of each result is estimated in the BDA feature space by calculating the distances between the produced eye patches and the mean of positive samples in the training set. Then, the result with higher confidence is adopted as the final eye detection result and is used to the face alignment process for face recognition. The experimental results for various face databases show that the proposed method performs more accurate eye detection and consequently results in better face recognition performance compared with other methods.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.38 no.11
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• pp.1257-1264
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• 2014

Efforts are presently underway for developing an optimal design methodology for GEN-IV nuclear reactors based on target failure probabilities. A typical example is the system-based code, in which the results are represented in the form of partial safety factors (PSFs). Thus, a PSF is one of the crucial elements in either component design or integrity assessment based on target failure probabilities during the operation period. In the present study, a procedure for calculating the PSF of a circumferential through-wall cracked pipe based on the elastic-plastic crack initiation criterion is established, in which the importance of each input variable is assessed. Elastic-plastic J-integrals are calculated using the GE/EPRI and reference stress methods, and the PSF values are calculated using both first- and second-order reliability methods. Moreover, the effect of statistical distributions of assessment variables on the PSF is also evaluated.

• Journal of Korea Entertainment Industry Association
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• v.13 no.6
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• pp.187-202
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• 2019

The main goal of this study is to investigate influence of trust in physical education (PE) teachers and immersion experience in PE classes on attitude and satisfaction during PE classes. Total 863 middle school students in Gwang-ju metropolitan area were recruited by utilizing a convenience sampling method. All data were analyzed by using SPSS statistic program ver. 25.0 (frequency analysis, exploratory factor analysis, reliability analysis, correlation analysis, multiple regression analysis). Alpha was set at 0.05. The results of this study is summarized as in the following. First, all sub-factors of trust in the PE teachers partially positively or negatively influence sub-factors of attitude during PE classes. Second, sub-factors of satisfaction during PE classes were partially positively affected to trust in the PE teachers. Third, Attitude during PE Classes were found to have partial positive influence on immersion experience in PE classes. Fourth, sub-factors of immersion experience in PE classes have partial positive effect on the sub-factors of satisfaction during PE classes. Thus, in order to the positive attitude and greater satisfaction during PE classes, it is important to establish the trust of PE teachers through maintaining interaction with students, constructing better systemic class, and creating the class conditions based on considering students' ability. In addition, in order to enhance immersion experiences of students during PE classes, it is necessary to set up learning goals and tasks based on ability of students, to study various teaching method, and to make only focusing on the performance based PE classes without grading.

• Journal of Korean Society of Coastal and Ocean Engineers
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• v.22 no.3
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• pp.156-162
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• 2010

When eccentric or inclined load acts on foundation of the port & harbor structures, partial safety factors of bearing capacity limit state were estimated using reliability analysis. Current Korean technical standards of port and harbor structures recommend to estimate the geotechnical bearing capacity using the simplified Bishop method. In practice, however, simple method of comparing ground reaction resistance with allowable bearing capacity has been mostly used by design engineers. While the simple method gives just one number fixed but somewhat convenient, it could not consider the uncertainty of soil properties depending on site by site. Thus, in this paper, partial safety factors for each design variable were determined so that designers do perform reliability-based level 1 design for bearing capacity limit state. For these, reliability index and their sensitivities were gained throughout the first order reliability method(FORM), and the variability of the random variables was also considered. In order to verify partial safety factors determined here, a comparison with foreign design codes was carried out and were found to be reasonable in practical design.

• Journal of Korea Water Resources Association
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• v.51 no.7
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• pp.543-554
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• 2018

A methodology has been presented for evaluating the partial safety factors on the sliding failure mode of vertical caissons of composite breakwaters and for determining the cross sections of those by Level I reliability-based design method. Especially, a mathematical model has been suggested for the sake of a consistency of code format as well as convenience of application in practical design, for which the uncertainties associated with buoyancy and its own weight can be taken into account straightforwardly. Furthermore, design criteria equation has been derived by considering accurately the effect of uplift pressure, so that the cross sections of caissons can be assessed which must be safe against the sliding failure. It has been found that cross sections estimated from partial safety factors proposed in this paper are in very good agreement with the results of Level II AFDA and Level III MCS under the same target probability of failure. However, partial safety factors of the Technical Standards and Commentaries for Port and Harbour Facilities in Japan and Coastal Engineering Manual in USA tend to estimate much bigger or smaller cross sections in comparison to the present results. Finally, many reliability re-analyses have been performed in order to conform whether the stability level of cross section estimated by Level I reliability-based design method is satisfied with the target probability of failure of partial safety factors or not.

• Journal of Korea Entertainment Industry Association
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• v.13 no.3
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• pp.169-180
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• 2019

The purpose of this study was to draw theoretical and practical implications applicable to the field through structural equation modeling of internal marketing, organizational trust, customer orientation and job performance to promote spectators of professional football. In order to achieve the aim of this study, we surveyed 12 S. Korea professional football clubs' employees(216 effective sample). Seven hypotheses were verified using frequency analysis, correlation analysis, reliability analysis, confirmatory factor analysis, path analysis and structural equation modeling through SPSS and AMOS statistics. The results are as follows. First, internal marketing had a positive effect on customer orientation. Second, internal marketing had a positive effect on job satisfaction. Third, internal marketing had a positive effect on organizational trust. Fourth, organizational trust had a positive effect on customer orientation. Fifth, organizational trust had a positive effect on job satisfaction. Sixth, organizational trust was found to partially mediate relationship between internal marketing and customer orientation. Seventh, organizational trust was found to partially mediate relationship between internal marketing and job satisfaction.

• Asia Marketing Journal
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• v.2 no.2
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• pp.13-38
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• 2000

최근 유통연구에서 상당히 진행되고 있는 신뢰에 기반한 관계형성에 관한 연구들은 신뢰를 장기지향적인 관계를 형성하는 핵심적인 개념으로 간주하고, 경로구성원의 신뢰형성에 관계되는 선행 및 결과요인에 대한 다양한 개념들을 가지고 다각적인 연구모델들을 제시하고 있다. 그러나 이와 같은 연구들의 공통된 견해는 신뢰를 기반으로 한 관계행동에 관한 연구가 쌍방향적 관점에서 실행되어야 한다는 필요성을 인식하면서도 실증부분에서는 어느 일방향적 관점에서 설명하는 한계점을 나타냈으며, 비록 연구모델이 쌍방적 측면을 고려했다고 할지라도 관계행동이 쌍방에 의해 형성된 하나의 신뢰인에 의한 것인지 경로구성원 각자가 독자적으로 형성한 상대방에 대한 신뢰들에 의한 것인지를 명확히 규명하지 못하고 있다. 따라서 이러한 한계점을 극복하기 위해 먼저 문헌고찰을 통하여 신뢰의 본질 및 방향성, 관계형성에서의 신뢰의 역할을 논의하고 이와 같은 문헌고찰을 토대로 신뢰의 선행변인과 결과변인을 도식화한 쌍방의 독자적 신뢰에 대한 모델을 제시하여, 마케팅 이론과 실무에 적합한 시사점을 제안하고자 한다

• Journal of Korean Society of Coastal and Ocean Engineers
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• v.32 no.6
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• pp.458-464
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• 2020

Calibration of load-resistance factors for the limit state design of perforated caisson breakwaters are presented. Reliability analysis of 12 breakwaters in nationwide ports was conducted. Then, partial safety factors and load-resistance factors were sequentially calculated according to target reliability index. Load resistance factors were optimized to give one set of factor for limit state design of breakwater. The breakwaters were redesigned by using the optimal load resistance factor and verified whether reliability indices larger than the target value. Finally, some load-resistance factors were proposed by changing target reliability index.

• Proceedings of the Korea Information Processing Society Conference
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• 2009.11a
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• pp.957-958
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• 2009

이 글은 신뢰성 문제와 관련된 현대 정보사회의 특성을 되짚어 본 다음, 정보보호와 신뢰성의 관계에 대해 살펴보고 웹 정보를 중심으로 신뢰성의 개념, 신뢰성 평가의 방법, 웹 사이트의 신뢰성 요인, 범주별 웹 사이트 신뢰도 등에 대해 이용자들을 대상으로 조사, 분석하고자 한다. 웹 사이트의 신뢰성 평가 항목과 조사 대상자의 표본 수가 제한되어 있다는 한계를 갖고 있으므로 이 부분은 향후 지속적인 조사와 연구를 통해 보완해 나갈 필요가 있다

• The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.11 no.5
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• pp.80-85
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• 1997

Preventive diagnosis technique of power transforms is very important for highly reliable operation of power systems, and especially that of online transformer is needed in view of economy. Acoustic methods for partial discharge points have been studied abroad since 1960's in earnest. Electric-ultrasonic locating method by which partial discharges are found through detecting the electric and ultrasonic signal generated in partial discharge and ultrasonic-ultrasonic locating method by which partial discharges are found through detecting two ultrasonic signal with two ultrasonic sensor have been researched in our country. By using this ultrasonic-ultrasonic locating method, it was proposed of graphical determination technique of partial discharge points one dimension, two dimension, three dimension. But in locating partial discharges, they have assumed that the number of signal origin is one. So in this study we suggests a method of locating and knowing the number of signal origins when there are several origins by using ultrasonic-ultrasonic method.