• Journal of the Institute of Electronics and Information Engineers
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• v.51 no.4
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• pp.110-122
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• 2014

As multimedia technologies develop, three-dimensional (3D) technologies are attracting increasing attention from researchers. In particular, video quality assessment (VQA) has become a critical issue in stereoscopic image/video processing applications. Furthermore, a human visual system (HVS) could play an important role in the measurement of stereoscopic video quality, yet existing VQA methods have done little to develop a HVS for stereoscopic video. We seek to amend this by proposing a 3D visual attention (3DVA) model which simulates the HVS for stereoscopic video by combining multiple perceptual stimuli such as depth, motion, color, intensity, and orientation contrast. We utilize this 3DVA model for pooling on significant regions of very poor video quality, and we propose no-reference (NR) stereoscopic VQA (SVQA) method. We validated the proposed SVQA method using subjective test scores from our results and those reported by others. Our approach yields high correlation with the measured mean opinion score (MOS) as well as consistent performance in asymmetric coding conditions. Additionally, the 3DVA model is used to extract information for the region-of-interest (ROI). Subjective evaluations of the extracted ROI indicate that the 3DVA-based ROI extraction outperforms the other compared extraction methods using spatial or/and temporal terms.

• Informatization Policy
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• v.27 no.1
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• pp.92-114
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• 2020

The purpose of this study is to analyze people's motivations to use the National Petition service of CheongWaDae, the Presidential Office of Korea. The online space has been used as a testbed of deliberative democracy. In fact, a wide variety of public opinions are being formed and gaining sympathy through the E-Petitions and Daum's Agora. In this regard, President Moon's government launched a petition site to gather public opinions. For any petition agreed on by more than 20,000 people within 30 days, the relevant ministry or the President's office must provide answers or feedback. This study wants to figure out how this National Petition is different from previous platforms like Agora or E-Petitions and why it is so well-received by people. This study uses a mix of both qualitative and quantitative methods. First, we conducted a focus group interview to factorize experiences of using the National Petition into measurable constructs. Second, we did a survey o 156 Koreans who had experienced the National Petition. Results show that symbolism, usefulness, gratification, and trust have positive impact on continuous usage intention. This study argues that symbolism, usefulness, gratification, and trust factors should be in place rather than technical aspects in order to increase the actual participation of users on the online platform of deliberative democracy. In addition, this study is meaningful in that it examined how different the CheongWaDae's National Petition is from the existing platforms for collecting public opinions and analyzed factors that encourage continuous use.

• Journal of the Korean earth science society
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• v.23 no.3
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• pp.221-233
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• 2002

This study investigated preservice science teachers' understandings of philosophical foundations(i.e., ontological and epistemological beliefs) underlying constructivist notions of learning. The teacher education program these subjects participated in explicitly addressed philosophical notions consistent with different views of constructivism. For these preservice science teachers, the program provided them with the opportunity to reflect upon the implications that their ontological and epistemological commitments had for their role as a science teacher. Data from four in-depth interviews were used to explore changes in each preservice science teacher's ontological beliefs, epistemological commitments, and pedagogical preferences. Results indicated that ontological beliefs and epistemological commitments were not necessarily consistent with conceptions of science teaching and learning for these preservice teachers. While some students internalized idealist and relativist perspectives, they did not integrate these relativist epistemological views into their preferred instructional practices. Also, regarding the fallible and tentative nature of knowledge, data in this study indicated that participants' epistemological beliefs about scientific Knowledge did influence how they were thinking about their roles as science teachers. Implications for teacher education programs and research on preservice science teacher's philosophical beliefs are discussed.

• Journal of The Korean Association For Science Education
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• v.35 no.6
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• pp.939-947
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• 2015

For secondary school teachers who attended 'A Social Constructionism Science Teacher Training Program', we analyzed their processes of cognizance change as well as whether they put its results into practice in the field of education, so as to find out the efficacy of the program. 'A Social Constructionism Science Teacher Training Program' consists of three phases based on La main ${\grave{a}}$ la $p{\hat{a}}te$, a French experience-oriented science education program. In its first phase, a study of the philosophy of La main ${\grave{a}}$ la $p{\hat{a}}te$ was made, together with a search for examples of creativity education. In its second and third stages, real education programs were developed for designated themes and free themes, respectively, and then discussions were made. It was a ten-session program, with each session comprising a four-hour sub-program. All activities were both visually and orally recorded, while the participants were asked to write reflective journals for each class. An additional survey and interview were conducted six months later to check if the seven selected secondary school teachers put the results of the program into practice. It was found that changes may be made in the beliefs of teachers with the introduction of theories in teacher indoctrination, but the acquisition of practical knowledge that can be implemented in actual classes may be effectively secured by demonstrations and practice sessions. It was concluded that indoctrination should be conducted to lead participants to the level of practical planning from the level of mere belief so that the theories might actually be put into practice in the education field.

• Journal of Science Education
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• v.38 no.3
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• pp.555-568
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• 2014

Even though identical science textbooks are used in elementary science classes, differences exist in teachers' teaching practices. The purpose of this study was to understand the relationships between elementary teachers' beliefs of science learning and their science teaching practices. An Likert-scale survey and interviews were performed on four elementary teachers to obtain information about the beliefs of teachers in science learning. In order to understand their teaching practices and the relationships between teachers' beliefs and their teaching practices, 2 classes per each teacher were recorded and instruction analyses were performed in the aspects of teaching contents, methods, and learning environments. The results showed that teacher A and B, who held traditional beliefs of science learning, taught their classes mainly based on teacher's explanation. While, teacher C and D, who held constructive beliefs of science learning, reorganized the contents of textbooks and applied various teaching methods and strategies in conducting their teaching practices. There were differences in teachers' beliefs of science learning and teaching practices. These differences in beliefs were related with their science teaching practices.

• Proceedings of the Korea Multimedia Society Conference
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• 2002.05d
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• pp.792-796
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• 2002

새로운 교육적 매체로서의 인터넷과 웹은 이제 전통적 교육 패러다임에 대한 강고한 도전이 되고 있다. 정보화사회의 열려진 공간으로서의 인터넷은 우리의 어린이와 청소년들에게 자발적이고 스스로의 학습 전략과 문제해결 대안을 찾아가는 발견적 학습이론과 구성주의이론에 의한 열린 학습환경을 지향해 가고 있는 것이 사실이다. 그러나 정보화 과학화 합리화를 지향하는 사회와 학교의 흐름속에서 실제 상처받고 잊혀져 가는 부분이 학생들의 감성이나 태도와 관련된 영역들이다. 본 연구는 유아들의 감성교육을 위한 보조자료로서의 동화 컨텐츠를 개발하여 유아들을 위한 감성교육의 자료를 축적하고자 한다.

• Proceedings of the Korea Multimedia Society Conference
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• 2001.06a
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• pp.378-381
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• 2001

새로운 교육적 매체로서의 인터넷과 웹은 이제 전통적 교육 패러다임에 대한 강고한 도전이 되고 있다. 정보화란 이상하에 열려진 공간으로서의 인터넷은 우리의 어린이와 청년들에게 자발적이고 스스로의 학습 전략과 문제해결대안을 찾아가는 발견적 학습이론과 구성주의이론에 의한 열린 학습환경을 지향해 가고 있는 것이 사실이다. 그러나 정보화 과학화 합리화를 지향하는 사회와 학교의 흐름속에서 실제 상처받고 잊혀져 가는 부분이 학생들의 인성이나 태도와 관련된 영역들이다. 본 연구는 인성교육을 위한 웹상에서의 멀티미디어 컨텐츠를 개발하여 학생과 일반인들에게 인성교육의 한 장을 열었다.

• Water for future
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• v.39 no.9 s.158
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• pp.83-94
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• 2006

1900년대 초부터 수자원공학에서의 최적화 기법은 상당한 기대 속에서 많이 활용되어 왔다. 최적화 모형은 시뮬레이션 모형에 비하여 상당히 많은 장점이 있음에도 불구하고, 기대한 만큼의 효과를 보지 못하고 있다. 그동안 실패한 사례도 많지만, 성공적인 사례도 많이 나오고 있다. 실패하는 이유는 개발자에게 더 많은 책임이 있지만, 모형에 대한 이해부족에 따른 사용자의 잘못도 있다 최적화 모형은 장점도 있지만, 단점도 많으므로 그 한계를 확실히 이해하고, 개발자는 물론 사용자도 실제 활용에 많은 주의를 기울여야 한다. 무리하게 사용하게 되면 시뮬레이션 모형을 활용하는 것 보다 종종 못한 결과가 나을 수도 있다. 최적화 모형에 대한 이해를 돕기 위해서 부족하지만, 수자원 공학에서 최적화 모형의 활용에 관련된 내용을 세 번에 나누어서 정리하였다.

• Proceedings of the CALSEC Conference
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• 2002.01a
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• pp.369-394
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• 2002

국가와 시민의 관계에서 볼 때, 기존의 정치·경제·행정체제 및 운용의 모습은 많은 문제점을 드러내고 있다. 정치적으로 간접(의회)민주주의 제도는 국민참여의 축소, 공공의제 및 영역의 축소, 사회적 불평등의 심화 및 정치불신을 초래하였으며, 경제적으로 시장경제의 실패는 정부개입과 그에 따른 정부의 실패를 야기하였다(정정목, 2000). 또한 행정 부분에서는 삼권분립의 견제와 균형보다는 행정권의 강화에 따른 이른바 행정국가의 등장과 이에 따른 국민의 저항과 입법 및 사법부의 위축 등을 경험하였다. (중략)

• Venture DIGEST
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• s.129
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• pp.34-35
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• 2009

2009년 3월 발표된 한국은행의 M&A 자료에 따르면 우리나라의 2008넌 M&A 거래건수는 1,153건이고, 거래 금액은 419억 달러에 달한다고 한다. 거래금액은 다소 감소한 것이나, 거래건수는 2007년에 비하여 107% 증가한 수준이다. M&A 거래 건수가 증가 했다는 것은 M&A가 활성화 되지 않은 국내 상황에서 상당히 고무적인 현상으로 볼 수 있겠다. 이 같은 M&A거래에는 여러 가지 거래유형이 숨어 있다. 이번호에서는 M&A 실제사례를 살펴보면서 유형별 특징과 주의사항을 알아보자.