• Human Ecology Research
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• v.52 no.1
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• pp.63-73
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• 2014

The purpose of this study is to investigate early childhood student teachers' practicum anxiety on the basis of the teacher's image and self-efficacy during their practicum. The participants of this study were 499 student teachers who were enrolled in the department of early childhood education in a college or a university and had completed the practicum in Daejeon metropolitan city or the Chungcheong area. The instruments for this study were the Teacher's Image Scale, Practicum Anxiety Scale, Self-efficacy Scale, and a questionnaire for socio-demographic variables. The collected data were analyzed by using a t -test, F test, Pearson's partial correlation, and multiple regression with SPSS software (version 20.0). The results were as follows: First, the student teachers expressed higher practicum anxiety in a provincial area than in metropolitan city, and their self-efficacy was higher in public kindergarten than in private kindergarten. Further, the highest level of the teacher's image was obtained in the case of student teachers who enrolled in a 2- or 3-year college program and completed the practicum in the metropolitan city. Second, there was a significant negative correlation between the sum of student teachers' practicum anxiety and their professional skills of teacher's image as well as significant correlations between the sum of student teachers' practicum anxiety and their self-efficacy, except self-control efficacy. Finally, the student teachers' practicum anxiety was found to be 17.5%-24.4% and was explained the most by the confidence of self-efficacy.

• Journal of Fashion Business
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• v.22 no.4
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• pp.130-144
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• 2018

This study aims to examine the future image of the fashion industry according to the level of consumer knowledge and anxiety about the 4th industrial revolution. An online survey was carried out from March 13 to 23, 2018. A total of 698 consumers participated in the survey. The results of the study are as follows. The consumer knowledge level about the 4th industrial revolution was 10.2% for the first recognition, 48.3% for the term recognition, and 41.5% for the content understanding. The level of consumer anxiety about the 4th industrial revolution was 36.5% lower than average and 63.5% higher than the average. An ANOVA was conducted to confirm the anxiety according to the knowledge level of the 4th industrial revolution. The results revealed that consumers with higher knowledge level felt more anxiety than consumers with a lower level of knowledge. Consumer's knowledge level about the 4th industrial revolution did not affect the future image of fashion industry and individual phases of the fashion industry. Consumer's anxiety level about the 4th industrial revolution had a partial influence on the future image of the fashion industry and on each phase of the fashion industry. In the midstream and downstream areas of the fashion industry, significant differences were observed in the future image according to the level of anxiety.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.14 no.3
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• pp.1086-1103
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• 2020

The automatic identification and classification of image-based weld defects is a difficult task due to the complex texture of the X-ray images of the weld defect. Several depth learning methods for automatically identifying welds were proposed and tested. In this work, four different depth convolutional neural networks were evaluated and compared on the 1631 image set. The concavity, undercut, bar defects, circular defects, unfused defects and incomplete penetration in the weld image 6 different types of defects are classified. Another contribution of this paper is to train a CNN model "RayNet" for the dataset from scratch. In the experiment part, the parameters of convolution operation are compared and analyzed, in which the experimental part performs a comparative analysis of various parameters in the convolution operation, compares the size of the input image, gives the classification results for each defect, and finally shows the partial feature map during feature extraction with the classification accuracy reaching 96.5%, which is 6.6% higher than the classification accuracy of other existing fine-tuned models, and even improves the classification accuracy compared with the traditional image processing methods, and also proves that the model trained from scratch also has a good performance on small-scale data sets. Our proposed method can assist the evaluators in classifying pipeline welding defects.

• Korean Institute of Interior Design Journal
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• v.24 no.5
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• pp.42-50
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• 2015

In the 21st century, university library is changing into a new paradigm. Among others, color image emerges as an important aspect of the library. Up to now, studies on colors of indoor space have been limited on partial and specific spaces. But, this study, using the tool of emotional evaluation, aims to do a comprehensive research on color image of the whole space. This research uses the H University library completed in March 2015. This research is performed in the following procedure. First, previous related researches for the past ten years from 2005 to 2015 is examined, which will help understand the trends in this kind of research, and set up the concrete goal of research. By literature review, color image is established in the environmental psychological aspect. Second, to analyze colors, all the spaces of the library from the entrance lobby are filmed. Filmed images are changed into mosaic, and color palettes are composed, and color values are calculated using the Munsell color system. Third, emotional words are extracted, and emotional evaluation is made. Using the Semantic Differential scale method, emotional differences among subjects are compared, and the validity of the survey data is tested using the statistical program SPSS 18.0. As the outcome of the research shows, the color image and emotion in space are closely related. And, through emotion, it is possible to get color image, and this aspect can be scholastically systemized and developed.

• Restorative Dentistry and Endodontics
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• v.28 no.6
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• pp.485-490
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• 2003

Complete understanding of the exterior and interior structure of the tooth would be prerequisite to the successful clinical results, especially in the restorative and endodontic treatment. Although three-dimensional reconstruction method using x-ray microtomography could not be used in clinical cases, it may be the best way to reconstruct the morphologic characteristics of the tooth structure in detail without destructing the tooth itself. This study was done to three dimensionally reconstruct every teeth in the arch in order to increase the understanding about the endodontic treatment and to promote the effective restorative treatment by upgrading the knowledge of the tooth morphology. After placing tooth between the microfocus x-ray tube and the image intensifier to obtain two-dimensional images of each level. scanning was done under the condition of 80 keV, $100{\;}\mu\textrm{m}$, 16.8 magnification with the spot size of $8{\;}\mu\textrm{m}$. Cross-section pixel size of $16.28{\;}\mu\textrm{m}$ and 48.83 cross-section to cross-section distance were also used. From the results of this study, precise three dimensional reconstructed images of every teeth could be obtained. Furthermore, it was possible to see image that showed interested area only, for example. enamel portion only, pulp and dentin area without enamel structure, pulp only, combination image of enamel and pulp, etc. It was also possible to see transparent image without some part of tooth structure. This image might be used as a guide when restoring and preparing the full and partial crown by showing the positional and morphological relationship between the pulp and the outer tooth structure. Another profit may be related with the fact that it would promote the understanding of the interior structure by making observation of the auto-rotating image of AVI file from the various direction possible.

• Journal of the Korean Society of Radiology
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• v.13 no.4
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• pp.509-516
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• 2019

In the linear transformation method, the original image is divided into a plurality of range blocks, and a partial transform system for finding an optimal domain block existing in the image for each range block is used to adjust the performance of the compression ratio and the picture quality, The nonlinear transformation method uses only the rotation transformation among eight shuffle transforms. Since the search is performed only in the limited domain block, the coding time is faster than the linear transformation method of searching the domain block for any block in the image, Since the optimal domain block for the range block can not be selected in the image, the performance may be lower than other methods. Therefore, the nonlinear transformation method improves the performance by increasing the approximation degree of the brightness coefficient conversion instead of selecting the optimal domain block, The smaller the size of the block, the higher the PSNR value, The higher the compression ratio is increased groups were quadtree block divided to encode the image at best.

• The Journal of Korean Academic Society of Nursing Education
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• v.28 no.3
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• pp.248-258
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• 2022

Purpose: This study aimed to identify the mediating effect of professional self-concept on the relationship between nurse's image and career identity, and between satisfaction with the nursing major and the career identity of nursing students. Methods: This study utilized a descriptive methodology, and 205 nursing students attending three universities in Busan Metropolitan City participated in it. Data were collected from self-reported questionnaires between March 26 and April 30, 2022. Data were analyzed with descriptive statistics, an independent t-test, analysis of variance, Pearson's correlation coefficient, and simple and multiple regression using the IBM SPSS 22.0 program and Sobel test. Results: The mean score of career identity was 2.92±0.57 out of a possible 4. Career identity showed a significantly positive correlation with nurse's image (r=.32, p<.001), satisfaction with major (r=.47, p<.001), and professional self-concept (r=.32, p<.001). Additionally, professional self-concept had a partial mediating effect on the relationship between nurse's image (Z=2.44, p<.001), satisfaction with major (Z=2.35, p<.001), and career identity. Conclusion: The results of the study show professional self-concept had a mediating effect on the relationship between nurse's image, satisfaction with the nursing major, and career identity. Based on the study's results, career identity education programs for nursing students need to include nursing image, satisfaction with major, and professional self-concept.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.28 no.6C
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• pp.648-658
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• 2003

As the usage of image/video contents increase, a security problem for the payed image data or the ones requiring confidentiality is raised. This paper proposed an image encryption methodology to hide the image information. The target data of it is the result from quantization in wavelet domain. This method encrypts only part of the image data rather than the whole data of the original image, in which three types of data selection methodologies were involved. First, by using the fact that the wavelet transform decomposes the original image into frequency sub-bands, only some of the frequency sub-bands were included in encryption to make the resulting image unrecognizable. In the data to represent each pixel, only MSBs were taken for encryption. Finally, pixels to be encrypted in a specific sub-band were selected randomly by using LFSR(Linear Feedback Shift Register). Part of the key for encryption was used for the seed value of LFSR and in selecting the parallel output bits of the LFSR for random selection so that the strength of encryption algorithm increased. The experiments have been performed with the proposed methods implemented in software for about 500 images, from which the result showed that only about 1/1000 amount of data to the original image can obtain the encryption effect not to recognize the original image. Consequently, we are sure that the proposed are efficient image encryption methods to acquire the high encryption effect with small amount of encryption. Also, in this paper, several encryption scheme according to the selection of the sub-bands and the number of bits from LFSR outputs for pixel selection have been proposed, and it has been shown that there exits a relation of trade-off between the execution time and the effect of the encryption. It means that the proposed methods can be selectively used according to the application areas. Also, because the proposed methods are performed in the application layer, they are expected to be a good solution for the end-to-end security problem, which is appearing as one of the important problems in the networks with both wired and wireless sections.

• Journal of the Society of Naval Architects of Korea
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• v.42 no.4 s.142
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• pp.421-426
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• 2005

Scattering center extraction schemes for radar cross section reduction of large complex targets, like warships, was developed, which are an 1-D radar image method(range profile), and a direct analysis based on an object precision method. The analysis result of partial dihedral model shows that the presented direct analysis method is more efficient than the 1-D radar image method for scattering center extraction of interested targets, in terms of radar cross section reduction design, not signal processing. In order to verify the accuracy of the direct analysis method, a scattering center analysis of an naval weapon system was carried out, and the result was coincident with that of another well-known RCS analysis program. Finally, an analysis result of RCS and its scattering center of an 120m class warship-like model presented that the direct analysis method can be an efficient and powerful tools for radar cross section reduction of large complex targets.

• Journal of the Korea Furniture Society
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• v.18 no.1
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• pp.56-69
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• 2007

As exchange and cooperation have increased in each country or region and a variety of NGOs are getting increasingly active in the 21st century, environments for the industry of international conventions have continued to improve. However, since the industry is in the starting stage, facilities for international conventions and professional management personnel are deficient. In this study, furniture design that shows the cultural identity of Korea from the invention facilities is focused and efforts are made in order to make the shape that has functionality and meaning based on the analysis of space. Participants of diverse nationalities, who use international convention facilities, feel Korea through furniture and remember its image; thus, this study focuses on the furniture design that has the identity of Korea. The concept of furniture design has been derived based on the traditional aesthetic consciousness in the symbolic, cultural, and emotional light. The identity of design does not depend on the partial characteristics of the traditional society but modernity and internationality shall coexist along with traditionality. Modernity and globalism are reflected along with the traditional elements in furniture.