• Korean Journal of Childcare and Education
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• v.6 no.2
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• pp.117-133
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• 2010

The purpose of this research is to find out whether children's self-efficacy can be improved by sensory activities devised to encourage spirituality. The survey involved 36 children aged 4 to 5. To measure the subjects' self-efficacy, Jeon Inok(1996)'s tool was used. The 18 members of the experimental group attended a program which was dedicated to promoting spirituality by using sensory activities. The program was administered three times a week for four weeks, totaling 12 sessions, each of which contained a type of activity and lasted about fifty minutes. To the 18 members of the control group, the standard child care curriculum was applied. The levels of the subjects' self-efficacy were measured twice, both in the same way, before and after the children participated in the program. The finding reveals that the program which was designed to boost children's spirituality through sensory activities has positive effect on children's self-efficiency - cognitively, socially, emotionally, and physically. The self-efficiency level in the experimental group significantly increased by t=7.17(df=34, p<.001) compared to the control group. So, it can be said that the program dedicated to improving spirituality using sensory activities is more effective than the standard child care curriculum.

• Journal of the Korean Society for information Management
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• v.20 no.3
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• pp.177-197
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• 2003

The purpose of this study is to suggest the subject and standards of evaluation on integrated IR interface. For this study, we studied the preceding research about major IR interface models. We took the survey for interface elements which were verified by experts. These interface elements are divided twe viewpoints. One is the cognitive viewpoints which are the page design, content design, site design, output form, usability and aesthelic facet. The other is the objective viewpoints which are page design, dontent design, site design, output for and usability. We found that these evaluation elements have a crediblilty.

• Journal of Digital Contents Society
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• v.18 no.7
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• pp.1323-1331
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• 2017

Despite the fact that the copyright has grown into a large-scale business, there are many constant problems especially in image copyright. In this study, we propose an automatic object extraction and classification system for the scanned educational book image by combining document image processing and intelligent information technology like deep learning. First, the proposed technology removes noise component and then performs a visual attention assessment-based region separation. Then we carry out grouping operation based on extracted block areas and categorize each block as a picture or a character area. Finally, the caption area is extracted by searching around the classified picture area. As a result of the performance evaluation, it can be seen an average accuracy of 83% in the extraction of the image and caption area. For only image region detection, up-to 97% of accuracy is verified.

• Journal of Digital Convergence
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• v.15 no.8
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• pp.225-234
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• 2017

This study was conducted with male/female teenagers to examine the interaction between their attachment to social media and their self-identity in both real space and cyberspace. Among the subjects, male teenagers tended to use social media more than female teenagers. Also, the more friends/followers they have, the more they would use the service itself. In the subordinate correlation of the subjects' self-identity in both cyberspace and real space, most areas showed positive correlation. And each subregion of the areas of real-space ego-identity and social media addiction showed positive correlation with them as well. On the other hand, in areas of social media addiction and cyberspace ego-identity, all areas showed negative correlation except the area of dominance. Through this experiment, it was proven apparent that there needs to be proper management of teenagers that are overusing and are addicted to social media, and that programs should be developed to mediate the subjects in regards to each subregion of real space and cyberspace ego-identity.

• Journal of the Korea institute for structural maintenance and inspection
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• v.18 no.1
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• pp.31-39
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• 2014

In order to design rigid zone area of frame structures, it is important to predict the direction change of internal stresses according to the bending moment acting on the joint region. In this study, it was examined whether current highway bridge design standards are useful to design different types of rigid joints having a various haunch shapes. In addition, stress distributions of inside of various rigid joints were inspected using the linear elastic finite element analysis. Based on the results of finite element analysis, the strut-tie models to design rigid joints are proposed. Suggested by this study, the strut-tie models have a same level of accuracy to a linear elastic finite element analysis. The proposed strut-tie models will be useful to design reinforcement details of rigid joints having a various haunch types.

• Journal of the Korea Society for Simulation
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• v.17 no.4
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• pp.41-50
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• 2008

In this study, an improved scheme for distance-based registration (DBR) is proposed and its performance is analyzed. In the DBR, when a mobile station (MS) enters a new cell, it calculates the distance between last registered cell and current cell and registers its location if the distance reaches reference distance D. In this study, two-location DBR (TDBR) is proposed to improve the performance of the DBR. In the TDBR, an MS stores not only last registered location area (LA) but also previously registered LA, and then no registration is needed when the MS crosses two LAs stored already. However, since the TDBR may increase paging cost, trade-off is necessary between decreased registration cost and increased paging cost. In this study, the performances of two schemes are analyzed and compared using 2-dimensional random walk mobility model in hexagonal cell configuration. We show that our mathematical analysis is accurate by comparing with simulation. From the numerical results for various circumstances, it is shown that our proposed TDBR outperforms current DBR in most cases.

• Journal of the Korean Chemical Society
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• v.60 no.1
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• pp.28-33
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• 2016

The spiropyran is a typical material having photodegradation properties in the process of photochromism. The spiropyran has been utilized in various applications such as optical switch, optical memories, and biosensor because of its remarkable stability, fast responsive time, stronger color change, and photo-induced controllability. However, the spriropyran is photodegraded by the repetitive optical irradiation. The photodegradation of spiropyran have been investigated by using UV-Visible spectroscopy, nuclear magnetic resonance (NMR), and Raman spectroscopy. Herein, the properties of spiropyran were characterized by using terahertz time-domain spectroscopy (THz-TDS) in the terahertz frequency region. In terahertz region, the measured absorbance of spiropyran was increased due to the photodegradation induced by the repetitive UV irradiation. The absorbance tendency of spiropyran in the terahertz frequency region was compared with that in the visible region, and they were completely opposite to each other.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.14 no.3
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• pp.339-348
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• 2001

More often a commercial package for the structural analysis is necessary in the structural optimum design. In this case the task of combining the package with an optimization program must be required, hut it is not so simple because interchanging some data between them is difficult. Sequential approximate optimization is currently used as a natural way to overcome the hard task. If sequential approximate optimization has wide side constraints that the lower limit of design variables is very small and their upper limit is very large, it is not so easy to obtain approximated functions accurately for the whole design domain. This paper proposes a sequential design domain method, which is very useful to carry out sequential approximate optimization in this case. In this paper, the response surface methodology is used to obtain approximated functions and the orthogonal array is used for design of experiments. The sequential approximate optimization of 3-bar and 10-bar trusses is demonstrated to verify the reliability of the sequential design domain method.

• Proceedings of the Korean Vacuum Society Conference
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• 2010.08a
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• pp.46-46
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• 2010

고진공펌프 중의 하나인 터보분자펌프(turbo-molecular pump: TMP)는 반도체/디스플레이 등 첨단 공정에서 진공 환경을 조성하는 핵심장비로서 현재 한국표준과학연구원 진공기술센터에서 개발 중인 고진공펌프 종합특성평가시스템을 구축 중이며, 1000 L/s 및 2500L/s 배기속도 용량을 가지는 터보분자펌프(TMP)의 database를 구축하고 있다. 이에 터보분자펌프(TMP)의 배기속도 측정 시 사용되는 가스의 분자류 영역에 따른 배기속도의 변화를 연구하고자 한다. 터보분자펌프(TMP)의 배기속도는 분자류 영역에 따라 상이한 배기속도를 가진다. 특히 가벼운 분자들은 터보분자펌프(TMP)로 배기시키기 어려우며, 분자량이 작은 가스들은 분자량이 큰가스 분자들에 비해 압축비(compression ratio)도 작아진다. 압축비가 큰 경우에는 실재 운전조건에 무관하게 배기속도가 최대값을 가지지만, 압축비가 작을 경우에는 운전 시 터보분자펌프(TMP)의 압축비에 따라 배기속도가 달라 질 수 있으며, 압축비는 펌프의 inlet에서의 압력과 exhaust에서의 압력의 비이다. 즉, 가벼운 기체 분자(H2, He 등)들은 무거운 기체 분자(N2, Ar 등)들에 비해 배기속력이 작아진다. 현재 개발 중인 한국표준과학연구원 진공기술센터의 고진공 종합특성평가시스템을 이용하여 분자류 영역에 따른 가벼운 기체 분자와 무거운 기체 분자의 배기속도를 측정하여 분자류 영역에 따라 상이한 배기속도의 변화를 연구하고자 한다. 본 논문에서는 터보분자펌프(TMP)의 분자류 영역에 따른 가벼운 기체 He과 무거운 기체 N2를 사용하여 압축비의 변화와 배기속도 측정에 관해 상관관계를 제시하며, 분자류 영역에 따른 터보분자펌프(TMP)의 배기속도 운전성능을 제시하고자 한다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2009.05a
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• pp.108-111
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• 2009

By a development of high-advanced science technology, the area of image made inter-area's communication more actively. Such the inter-image exchange facilitated a new combination of areas. By such the development and the activation of public design, the area of image has been extended into the area of environmental design as the public meaning. According to this flow, the media art of using a light has been introduced in the environment of water-front in Korea. Hence, it enhanced the region's identity and gave a special impression to tourists. However, the study on the area of image in the Korean environment aldesign is still in sufficient. Accordingly, the constant expression development absolutely required. For develop ingand researching a variety of expression techniques, the utilization of media art is expected to work as the alternative of image expression technique.