• JSTS:Journal of Semiconductor Technology and Science
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• v.16 no.6
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• pp.800-807
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• 2016

We propose a fast algorithm using Extreme Contour Point (ECP) to detect the angle of rotated images, is implemented by rotation feature of one covered frame image that can be applied to correct the rotated images like in image processing for real time applications, while CORDIC is inefficient to calculate various points like high definition image since it is only possible to detect rotated angle between one point and the other point. The two advantages of this algorithm, namely compatibility to images in preprocessing by using Sobel edge process for pattern recognition. While the other one is its simplicity for rotated angle detection with cyclic shift of two $1{\times}n$ matrix set without complexity in calculation compared with CORDIC algorithm. In ECP, the edge features of the sample image of gray scale were determined using the Sobel Edge Process. Then, it was subjected to binary code conversion of 0 or 1 with circular boundary to constitute the rotation in invariant conditions. The results were extracted to extreme points of the binary image. Its components expressed not just only the features of angle ${\theta}$ but also the square of radius $r^2$ from the origin of the image. The detected angle of this algorithm is limited only to an angle below 10 degrees but it is appropriate for real time application because it can process a 200 degree with an assumption 20 frames per second. ECP algorithm has an O ($n^2$) in Big O notation that improves the execution time about 7 times the performance if CORDIC algorithm is used.

• Child Health Nursing Research
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• v.23 no.4
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• pp.429-439
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• 2017

Purpose: The aim of this study was to identify the status of psychological health among boys in high school and to examine the mediating effects of social support on the relationship between anger and entrapment on psychological health. Methods: The participants in this study were 193 high school boys from Jeju. Measurements included state-trait anger expression inventory, entrapment scale, student social support scale, and questionnaires to assess mental and physical health. Data were analyzed using independent t-test, one-way ANOVA, $Scheff{\acute{e}}$ test, Pearson correlation coefficient, simple and multiple regression techniques with the SPSS 21.0. Mediation analysis was performed with the Baron and Kenny's method, and Sobel test. Results: Mean scores for anger experience, entrapment, social support, and psychological health were $29.81{\pm}7.34$, $34.09{\pm}16.33$, $45.75{\pm}7.02$, $22.51{\pm}9.91$, respectively. There was a significant correlation between anger experience and psychological health. Entrapment was significantly correlated with psychological health. Social support showed partial mediating effects in the relationship between anger experience and psychological health (Sobel test: Z=54.18. p<.001). Social support showed partial mediating effects in the relationship between entrapment and psychological health (Sobel test: Z=2.24. p=.025). Conclusion: The results indicate a need to develop social support programs for boys in high school.

• The Journal of the Korea Contents Association
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• v.15 no.11
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• pp.177-191
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• 2015

This study was designed to investigate the differences in the mediation effects of cognitive emotion-regulation in the relationships between family stress and marital satisfaction of middle-aged husbands and wives. The data were underwent through the SPSS 19. Win for frequency, paired-t-test, multiple regression analysis, and for the further analysis of hiearchical multiple regression and the analysis for the mediation effect proposed by Baron & Kenny(1996) and Sobel test(Sobel, 1982). The results were as follows. First, hiearchical multiple regression analysis showed that education level, couples' problems, replanning strategies were proved to be significant for the marital satisfaction of the husbands, while age, couples' problems, acceptance strategies were significant for the marital satisfaction of the wives. Second, cognitive emotion-regulation strategies were proved to partially mediate in the relationship between family stress and marital satisfaction. The limitations of the study and implications for the further research were discussed based on the results.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.9 no.8
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• pp.1787-1792
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• 2005

The join of remote sensing and GIS(Geographic Information System) could be useful in various fields of marine information and land information as well as ITS(Intelligent Transport Systems). This paper is LPF(Low Pass Filtering) for the extraction of island detection in coastal zone Iron SPOT imagery which is 10m resolution photograph. The study area is based on the southern sea in korea. Sobel operator performed the extraction of island detection in coastal zone after the LPF processing by remote sensing. And, GIS was used to generate from raster to vector data. As the result, The best way prove out the 5${\times}$5 convolution mask about the LPF processing of island detection in coastal zone. It is judged the research which it sees with the fact that the presentation of very scientific and reasonable data will be possible from the oceanic dispute will occur from the EEZ(Exclusive Economic Zone).

• Journal of Industrial Convergence
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• v.20 no.6
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• pp.125-133
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• 2022

The purpose of this study was to identify the mediating effects of positive thinking in the relationship between emotional expressivity and public speaking anxiety. Participants were recruited from one university freshmen located in Gwangju city. Data were collected from 146 university freshmen. The self-reported questionnaire was used to assess the level of positive thinking, emotional expressivity, public speaking anxiety. The SPSS WIN 23.0 version program was used with Baron and Kenny's 3-Step mediating effect and Sobel test. It was examined whether there was a mediating effect of positive thinking on emotional expression and presentation anxiety. In the second stage, emotional expressivity showed a significant effect on presentation anxiety. In stage 3, emotional expressivity was not statistically significant in presentation anxiety, and positive thinking was statistically significant in presentation anxiety. Positive thinking had a total mediating effect(z=-4.57, p<.001) in the relationship between emotional expressivity and public speaking anxiety. To reduce the public speaking anxiety among university freshmen, it is necessary to develop interventions that enhance positive thinking in addition to providing emotional expressivity.

• Journal of the Institute of Convergence Signal Processing
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• v.23 no.4
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• pp.249-255
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• 2022

Potholes are an important clue to the structural defects of asphalt pavement and cause many casualties and property damage. Therefore, accurate pothole detection is an important task in road surface maintenance. Many machine learning technologies are being introduced for pothole detection, and data preprocessing is required to increase the efficiency of deep learning models. In this paper, we propose a preprocessing method that emphasizes important textures and shapes in pothole datasets. The proposed preprocessing method uses intensity transformation to reduce unnecessary elements of the road and emphasize the texture and shape of the pothole. In addition, the feature of the porthole is detected using Superpixel and Sobel edge detection. Through performance comparison between the proposed preprocessing method and the existing preprocessing method, it is shown that the proposed preprocessing method is a more effective method than the existing method in detecting potholes.

• Asia-pacific Journal of Multimedia Services Convergent with Art, Humanities, and Sociology
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• v.8 no.2
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• pp.555-566
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• 2018

The aim of the study was to explore the mediating effect of meaning in life on the relationship between meaning making about process of achieving long term goals and happiness. 180 college students completed the open questionnaire about personal long life goal, also rated the scales of meaning making, meaning in life and subjective well-being. The correlation analysis, hierarchical regression analysis, and sobel test were examined. The results as followed. First, meaning making, meaning in life and happiness were positive correlated. Second, the relationship between meaning making about process achieving long term goals and happiness was completely mediated by meaning in life. The finding suggested that meaning making and meaning in life can help to enhance happiness in college students. Also the results supported that meaning in life was important factor that affects subjective well-being in Koran college students. Finally, the limitations were suggested for future research.

• The Korean Journal of Applied Statistics
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• v.24 no.2
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• pp.359-371
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• 2011

Edge detection in images is an important step in image segmentation and object recognition as preprocessing for image processing. This paper presents a new edge detection using local histogram analysis based on wavelet transform. In this work, the wavelet transform uses three components (horizontal, vertical and diagonal) to find the magnitude of the gradient vector, instead of the conventional approach in which tw components are used. We compare the magnitude of the gradient vector with the threshold that is obtained from a local histogram analysis to conclude that an edge is present or not. Some experimental results for our edge detector with a Sobel, Canny, Scale Multiplication, and Mallat edge detectors on sample images are given and the performances of these edge detectors are compared in terms of quantitative and qualitative measures. Our detector performs better than the other wavelet-based detectors such as Scale Multiplication and Mallat detectors. Our edge detector also preserves a good performance even if the Sobel and Canny detector are sharply low when the images are highly corrupted.

• The Journal of the Korea Contents Association
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• v.17 no.2
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• pp.595-611
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• 2017

This study aims to verify the effect that familism recognized by college students has on anxiety over aging and elderly group's attitude as well as mediation effect of a sense of filial duty. For study analysis, 200 college students studying at colleges in Sungnam, Anyang and Incheon in Gyeonggido as well as in Seoul were surveyed using structured questionnaires from May 2, 2016 to June 28, 2016. All of 166 responses except for 34 incomplete ones were used for analysis. Firstly, analysis result confirmed correlation among familism, anxiety over aging, elderly group's attitude and variables in sense of filial duty. Multicollinearity between variables were confirmed using VIF values. Secondly, the effect that familism recognized by college students has on anxiety over aging and elderly group's attitude was confirmed. Thirdly, partial mediation effect of a sense of filial duty was confirmed in the effect that familism recognized by college students has on anxiety over aging. In addition, Sobel Test suggested by Sobel was conducted to verify significance of the mediation effect. This study suggests intervention in and practice of social welfare to promote familism and a sense of filial duty between college students and elderly generation in this era of nuclear family and aging society as well as reduction of anxiety over aging on the part of college students, based on the verified mediation effect of a sense of filial duty in the effect that familism recognized by college students in aging society has on anxiety over aging.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.7
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• pp.125-132
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• 2018

The purpose of this study is to examined the relationship between child care teachers' science teaching efficacy and children's scientific attitude. Then, using the instructional creativity as a parameter to increase the quality of teacher-children interaction, we examined how the teacher-children relationship changed. In this study, 303 child care center teachers in Suwon, Gyeeonggi were surveyed. To analyze the data, structural equation modeling and Sobel-test were performed using SPSS 23.0 and AMOS 23.0. The analysis results showed that child care center teachers' science teaching efficacy had positive effects on the teachers' creativity and the children's scientific attitude. Furthermore, the creativity of child care center teachers had a positive effect on children's scientific attitude. The result of the Sobel-test revealed that child care center teachers's creativity played a mediating role between teachers' science teaching efficacy and children's scientific attitude and acted as a key variable in promoting children's scientific attitude. In conclusion, it has been identified that the creativity of the infant teacher's teaching is an important change that has a positive effect on the child's scientific attitude. Therefore, if education is provided to enhance the creativity of the professor when the infant teacher is working as a science professor at the same time, it can contribute to the quality of the child's scientific attitude.