• Science of Emotion and Sensibility
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• v.17 no.3
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• pp.83-94
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• 2014

The present study examined the intensity of affective forecasting and the size of affective forecasting errors of people who experienced social exclusion or those high in need to belong. In Particular, a series of studies was designed to explore the moderating role of the types of future events (i.e. social vs. non-social events) in the relationship between social exclusion, the need to belong and affective forecasting. Results indicated that participants who experienced social exclusion or be high in need to belong showed significantly extreme affective ratings on the future social events compared to the future non-social events. Additional results suggested that more social exclusion experiences or higher needs to belong did not affect to the affective ratings on the experienced social events, indicating greater affective forecasting errors of socially excluded people or people with higher need to belong. The implications and limitations of the results were also discussed.

• Journal of Educational Research in Mathematics
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• v.14 no.4
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• pp.387-401
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• 2004

The recent international comparative studies such as PISA(Program for International Student Assessment) and TIMSS-R(Third International Mathematics and Science Study-Repeat) provide results of relative mathematics achievement of participating countries. The purpose of this paper is to compare the mathematics results of PISA and TIMSS-R. To make PISA and TIMSS-R results comparable, they were standardized. The close investigation of these standardized results reveals that the two Asian countries(Korea and Japan) and several English speaking countries have the commonality in mathematics achievement. Thus this study looks for patterns and similarities within a group of Asian countries(Korea and Japan) and Western countries(the U.S and Australia) by in-depth analysis of PISA mathematics achievement based on item response theory. As a result, it was noted that Western countries tend to perform well on open constructed items and are likely to perform better when an item involves less formal mathematics. On the other hand, Asian countries perform well when an item involves numeric or algebraic computation related to curriculum-based content, but they are relative poor at an item calls for verbal explanations or interpretations of graphs.

• Proceedings of the KSCN Conference
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• 2003.11a
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• pp.1055-1056
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• 2003

식습관이나 식품 기호도는 식품의 선택에 있어서 중요한 변수이며 어릴 때 형성이 되는 어린이의 식품 기호도는 부모의 태도에 크게 영향을 받는다. 특히 유아기는 사회적, 인지적 능력이 발달하고 모방을 통하여 학습되는 시기이므로 이 시기의 식품에 대한 올바른 인식과 경험은 평생의 건강을 위해서도 부모의 역할은 중요하다. 근래 과잉 영양과 관련된 비만이 우려되고 있지만 아직도 유아에서는 부적절한 식사패턴으로 인한 영양소 결핍이 문제가 되고 있다. 선행 연구에서 유아나 어린이의 식습관이 부모, 특히 어머니의 영향을 많이 받는다고 지적하고 있지만 상호 관련에 대한 연구는 미흡하다. 또한 ‘무엇’과 ‘얼마나 많이’ 등이 중점이 되었던 양적 연구에서 이제는 ‘어떻게’ ‘왜’라는 것에 관심을 두는 사례연구의 중요성이 대두되고 있으므로 본 연구에서는 취학전 아동의 식습관과 영양상태에 관한 질적 연구로써 어머니와의 상호 관련성을 알아보고자 하였다. 대구, 부산지역에 거주하는 4∼7세 유아와 그 어머니(각 15명)를 대상으로 포커스 그룹 인터뷰를 실시하고 유아와 1:1면담을 실시하였다. 어머니들의 식품구매에 영향을 미치는 주요 요인은 어머니 자신의 기호도와 편리, 가치관으로 나타났다. 유아와 어머니의 식품기호도를 조사한 결과 좋아하는 식품의 경우 두 군 모두 육류의 선호도가 높았다. 싫어하는 식품은 어머니의 경우에는 ‘없다’가 73%이었으나 유아의 경우에는 ‘야채류’가 73%이었다. 유아와 어머니의 식품 기호도 일치정도는 좋아하는 식품이 67%, 싫어하는 식품이 33%로 나타났다. 유아는 야채류를 싫어한다고 대답하면서도 건강에 좋은 식품을 ‘야채류’라고 생각하고 있었다 유아의 특정 식품의 선호도나 거부의 주된 이유는 ‘맛’이었으며, 유아의 편식습관은 어머니가 간편성 위주, 가족의 기호도 만을 고려하여 식단을 구성하는 것과 관련이 있었다. 조사대상 유아의 33%가 비타민제, 47%가 칼슘제제를 복용하고 있었으며 27%가 근래에 보약을 복용한 경험이 있었다. 어머니들은 영양제나 보약이 유아의 건강 유지에 많은 도움이 된다고 여기고 있었고 어머니의 임신 중 식품섭취나 이유기의 식품경험정도가 어린이의 식품 기호도에 영향을 미친다고 생각하고 있었다. 어머니가 식품구매시 질적으로 고려하는 부분은 건강과 관련된 무농약 식품, 인스턴트 식품 제한, 외식의 절제가 대부분 어머니의 관심사였다. 본 연구에서 어머니는 유아의 식습관과 식품기호도에 크게 영향을 미침을 알 수 있었으며, 유아 영양교육에서 어머니의 참여와 식품에 대한 인식 개선은 유아의 영양수준 개선에 필수적이라고 생각된다.

• The Journal of the Korea Contents Association
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• v.13 no.9
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• pp.476-484
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• 2013

The purpose of this study was to analyze the quality of 67 kinds of e-learning contents in an attempt to boost the effectiveness of distance teacher training. As a result of analyzing, the e-learning contents were rated highest in terms of 'training content,' followed by 'instructional design,' 'teaching & learning strategies,' 'evaluation' and 'interaction.' The scores of 'teaching & learning strategies,' 'evaluation' and 'interaction' were below 80 that was the standard of quality certification. In mean comparison(ES) of contents quality level between certified contents and non certified contents, 'instructional design' had the largest ES(effect size), followed by 'teaching & learning strategies,' 'evaluation'. In the analysis of evaluation factors, most of factors had a large effect such as 'webpage layout', 'selection of instructional design'. The findings of the study are expected to suggest what improvements should be made in the development of e-learning contents for distance teacher training.

• Journal of Satellite, Information and Communications
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• v.7 no.2
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• pp.47-53
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• 2012

In general, it is essential that contents are to be provided with proper bitrate according to network conditions in order to support higher quality of video streaming services over wired and wireless networks. Recently, DASH is adopted by the MPEG as the standard for HTTP based adaptive streaming technology and consists of the server and clients. The clients should parse XML files from the server and play contents after accessing the finely divided segments into various bitrates. In this paper, we designed a Smart AP(Access Point) which exists between DASH contents server and Non-DASH clients enables provide DASH services to Non-DASH clients. In addition, proposed Smart AP provides DASH service to various types of clients as maintaining the existing environment without additional development costs.

• The Journal of the Korea Contents Association
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• v.8 no.2
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• pp.74-82
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• 2008

This paper investigates chrominance reconstruction methods that reconstruct subsampled chrominance information efficiently using the correlation between luminance and chrominance components in the decompression process of compressed images, and analyzes drawbacks involved in the adaptive-weighted 2-dimensional linear interpolation among the methods, which shows higher efficiency in the view of computational complexity than other methods. To improve the drawback that the spatial frequency distribution is not considered for the decompressed image and to support the application on a low-performance system in behalf of 2-dimensional linear interpolation, this paper proposes the multi-mode reconstruction method which uses three reconstruction methods having different computational complexity from each other according to the degree of edge response of luminance component. The performance evaluation on a development platform for embedded systems showed that the proposed reconstruction method supports the similar level of image quality for decompressed images while reducing the overall computation time for chrominance reconstruction in comparison with the 2-dimensional linear interpolation.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.9
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• pp.5998-6008
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• 2015

The value of social network and entrepreneurial orientation has widely been acknowledged as a critical resource of business success. However, the previous studies did not specify each role and conceptually have examined them as separate antecedents of firm performance. This study develops propositions concerning network capabilities and investigates the moderating effects of network structures (degree centrality, closeness centrality, and betweenness centrality) on the relationship between entrepreneurial orientation and firm performance. This research conducted with a sample of 115 small consulting companies in Korea. The findings indicate that closeness centrality moderates the relationship between proactiveness and performance. Also, the combination of betweenness centrality and proactiveness exerts a positive impact on performance. Accordingly, degree centrality enhances the influence of innovativeness on performance. In particular, betweenness centrality exacerbates the influence of risk-taking on performance against our expectation. Overall, these findings conclude the synergistic effects of network capability and entrepreneurial orientation on firm performance. Finally, practical implications and academic propositions are presented regarding the way firms could most effectively utilize entrepreneurial orientation and network capability to maximize firm performance.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.11 no.5
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• pp.507-513
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• 2018

Steganography is a technique that uses hidden messages to prevent anyone apart from knowing the existence of a secret message, except the sender and trusted recipients. This paper applies 24 bit color image as cover medium. And a 24-bit color image has three components corresponding to red, green and blue. This paper proposes an image steganography method that uses Triple-A algorithm to hide the secret (Hangul) message by arbitrarily selecting the number of LSB bits and the color channel to be used. This paper divides the secret character into the chosung, jungsung and jongsung, and applies crossover, encryption and arbitrary insertion positions to enhance robustness and confidentiality. Experimental results of the proposed method show that insertion capacity and correlation are excellent and acceptable image quality level. Also, considering the image quality, it was confirmed that the size of LSB should be less than 2.

• 대한공업교육학회지
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• v.31 no.2
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• pp.83-110
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• 2006

A change in industrial education has been demanded with the emergence of rapidly changing knowledge-based society. Keeping pace with the current trend, the Specialized High Schools should analyze what their students need and suggest what they should do to be qualified for work. Even though the education paradigm is in the process of change from traditional industrial society to knowledge-based society, the Specialized High School still focuses on the out-of-trend traditional curriculum. Now, it's a time to introduce new curriculum which analyzes on-the-spot tasks and enhances students' creativity and capability to solve problems. For this study, new '3-Type school curriculum' models are examined. Furthermore, the on-the-spot based curriculum, which nurtures students' creativity and capability to take care of things should be adopted. This paper showed a direction toward the activation and generalization of the industrial education by specifying to which direction the 3-type curriculum-based the Specialized Vocational High School should move.

• Journal of Information Technology and Architecture
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• v.11 no.2
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• pp.175-185
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• 2014

This study is based on the information security management system, the threat from mobile office, mobile office configuration item type, vulnerability analysis and control at the level of the current possibilities for technology to its purpose. To perform exploratory study for mobile Office to target the new technology, we were used the integrated research methods such as the documentary survey, expert FGI and real user's survey. To identify the main risk areas of mobile office services, we develop the mobile service layer model that separated the place, terminal, network, server according to service deliverly system. Finally, the result of survey for threats and vulnerabilities showed that the control of the terminal of user is a significant.