• 한국초등과학교육학회지:초등과학교육
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• 제23권4호
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• pp.297-304
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• 2004

The purpose of this study was to investigate inservice elementary teachers' view and the change of preservice elementary teachers' view on the nature of science by the science education course. The subjects were 386 junior preservice teachers in a National University of Education and 257 inservice teachers working in a metropolitan city. An instrument consisting of fifty eight items were developed on the bases of previous studies. Before entering the course, preservice teachers view was compared by gender with T-test and no significant differences were found except the category 'role of a scientist'. Preservice teachers view was also compared by major with ANOVA and significant differences were found on the categories 'scientific method' and 'scientific law'. After the course, on comparing their view by gender, significant differences were found on the categories 'scientific theory', 'scientific knowledge', and 'scientific law'. The result of ANOVA by major, significant differences were found except the category 'role of a scientist'. Inservice teachers view was compared by gender and major and the differences were no significant, the significant differences, however, were founded in comparing by career and ability.

• 한국과학교육학회지
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• 제23권4호
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• pp.401-418
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• 2003

The purpose of this study was to examine philosophical views on science of two influential curriculum documents, AAAS' s Benchmarks for Scientific Literacy (Benchmark) and NRC's National Science Education Standards (Standard), and to get educational implications about a desired philosophical view on science at a school science level. In order to determine the philosophical views on science explicitly suggested in the documents, Soh's Philosophical Perspectives Probe (PPP) was used as a framework for analysis. Forty preservice teachers reviewed the documents, extracting paragraphs with which statements of the PPP' s questions would agree. The results of the study were as follows: First, the Benchmark's philosophical view on science corresponds to the borderline between inductivism and eclecticism, or eclecticism close to falsificationism. The philosophical positions by the PPP' s themes are very different. Second, the Standard's philosophical position on science corresponds to inductivism close to eclecticism. Its philosophical position by the themes of the PPP is very different like the Benchmark. These results indicate that philosophical positions of the documents are more complex than popular conceptions would have it. That is to say, the results suggest that the science curriculum documents hold not only a contemporary philosophical view on science but also a traditional view on science, and that the philosophical positions on science are different from each other by documents and even by the PPP's themes in the same document. The results suggest that the philosophical views on science in school science contexts need to be adjusted and presented to K-12 students according to topics related to philosophy of science.

• 한국과학교육학회지
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• 제39권5호
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• pp.681-694
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• 2019

This study intends to delineate the characteristics of various perspectives on the nature of science (NOS) through the textbook analysis. Thus, centering on a science textbook called Science Laboratory Experiments, this study analyzes the elements of the NOS from three different perspectives: the consensus view, features of science (FOS), and family resemblance approach (FRA). While the consensus view highlights the similar elements of the NOS across the topics, the FOS is concerned about empirical ways for doing science. The FRA rather focuses on socio-cultural aspects of science activities. While the consensus view is useful to reify the features of the NOS, the FRA helps to understand science from various viewpoints. Regarding the philosophical account for three perspectives, all of them are ambiguous to some extent. The consensus view holds contradictory dispositions e.g., relativism vs. (post-)positivism, and critical realism and instrumentalism. The FOS supports empirical tradition but cannot effectively cope with the anomalous situation. The FRA is useful to show up the ways of science in both microscopic (personal) and macroscopic (social) viewpoints. However, the broader concept about science may mislead understanding of the NOS. Consequently, this study provides some implication for improving the framework of the NOS and teaching the NOS in the classroom.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제8권7호
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• pp.2464-2479
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• 2014

Multi-view video coding is an international encoding standard that attains good performance by fully utilizing temporal and inter-view correlations. However, it suffers from high computational complexity. This paper presents a fast encoder design to reduce the level of complexity. First, when the temporal correlation of a group of pictures is sufficiently strong, macroblock-based inter-view prediction is not employed for the non-anchor pictures of B-views. Second, when the disparity between two adjacent views is above some threshold, frame-based inter-view prediction is disabled. Third, inter-view prediction is not performed on boundary macroblocks in the auxiliary views, because the references for these blocks may not exist in neighboring views. Fourth, finer partitions of inter-view prediction are cancelled for macroblocks in static image areas. Finally, when estimating the disparity of a macroblock, the search range is adjusted according to the mode size distribution of the neighboring view. Compared with reference software, these techniques produce an average time reduction of 83.65%, while the bit-rate increase and peak signal-to-noise ratio loss are less than 0.54% and 0.05dB, respectively.

• 대한화학회지
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• 제58권1호
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• pp.105-117
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• 2014

이 연구의 목적은 예비화학교사들이 사범대학에서 수강한 과학교육 과목은 학습관과 어떠한 관련성을 갖는지를 고찰하는 것이었다. 이를 위해, 예비교사 3인의 학습관 및 수강한 과학교육 과목과 관련한 설문과 면담을 실시하였다. 연구 결과, 예비교사들은 과학교육 과목의 수강을 통해 자신의 학습관을 변화, 수정하거나 유지, 강화하는 모습을 보였다. 과학교육 과목을 수강하기 전에 지녔던 예비교사 K와 P의 전통적 학습관은 과학교육 과목의 수강을 통해 구성주의적 학습관으로 변화하였다. 그러나 구성주의 학습관은, 학교 현장 실제성에 바탕을 둔 과학교육 과목 수강 이후에 다시 현장의 수업 상황을 고려하여 수정되고 변형되었다. 예비교사 H는 이전부터 지녔던 구성주의적 학습관에 전통적 학습관을 추가하여 지니게 되었다. 이로부터 정도와 방향의 차이는 있지만 예비교사 K, P, H 모두 과학교육 과목의 수강을 통해 학습관을 고찰하고 수정하는 것을 알 수 있다. 이러한 연구 결과는, 이론의 현장 적용을 강조한 과학교육 과목이 예비교사들로 하여금 자신의 학습관을 고찰하고 수정할 수 있는 기회를 제공한다는 것을 보여주는 것으로써, 교원 양성대학의 과학교육 과목의 내용에 현장성이 많이 반영되어야 할 것이며, 예비교사별 맞춤식 교수활동 및 학습관 정립을 위한 예비교사의 반성적 사고과정이 포함되어야 할 것임을 시사한다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제16권3호
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• pp.813-829
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• 2022

In multi-view subspace clustering, how to integrate the complementary information between perspectives to construct a unified representation is a critical problem. In the existing works, the unified representation is usually constructed in the original data space. However, when the data representation in each view is very diverse, the unified representation derived directly in the original data domain may lead to a huge information loss. To address this issue, different to the existing works, inspired by the latest revelation that the data across all perspectives have a very similar or close spectral block structure, we try to construct the unified representation in the spectral embedding domain. In this way, the complementary information across all perspectives can be fused into a unified representation with little information loss, since the spectral block structure from all views shares high consistency. In addition, to capture the global structure of data on each view with high accuracy and robustness both, we propose a novel low-rank approximation via the tight lower bound on the rank function. Finally, experimental results prove that, the proposed method has the effectiveness and robustness at the same time, compared with the state-of-art approaches.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제13권11호
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• pp.5546-5559
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• 2019

Facial action units (AUs) have recently drawn increased attention because they can be used to recognize facial expressions. A variety of methods have been designed for frontal-view AU detection, but few have been able to handle multi-view face images. In this paper we propose a method for multi-view facial AU detection using a fused multilayer, multi-task, and multi-label deep learning network. The network can complete two tasks: AU detection and facial view detection. AU detection is a multi-label problem and facial view detection is a single-label problem. A residual network and multilayer fusion are applied to obtain more representative features. Our method is effective and performs well. The F1 score on FERA 2017 is 13.1% higher than the baseline. The facial view recognition accuracy is 0.991. This shows that our multi-task, multi-label model could achieve good performance on the two tasks.

• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 2009년도 IWAIT
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• pp.1-6
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• 2009

Due to the different camera properties of the multi-view camera system, the color properties of captured images can be inconsistent. This inconsistency makes post-processing such as depth estimation, view synthesis and compression difficult. In this paper, the method to correct the different color properties of multi-view images is proposed. We utilize a gray gradient bar on a display device to extract the color sensitivity property of the camera and calculate a look-up table based on the sensitivity property. The colors in the target image are converted by mapping technique referring to the look-up table. Proposed algorithm shows the good subjective results and reduces the mean absolute error among the color values of multi-view images by 72% on average in experimental results.

• Journal of the Optical Society of Korea
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• 제20권2호
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• pp.239-244
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• 2016

Mugshot face images, routinely collected by police, usually contain both frontal and profile views. Existing automated face recognition methods exploited mugshot databases by enlarging the gallery with synthetic multi-view face images generated from the mugshot face images. This paper, instead, proposes to match the query arbitrary view face image directly to the enrolled frontal and profile face images. During matching, the 3D face shape model reconstructed from the mugshot face images is used to establish corresponding semantic parts between query and gallery face images, based on which comparison is done. The final recognition result is obtained by fusing the matching results with frontal and profile face images. Compared with previous methods, the proposed method better utilizes mugshot databases without using synthetic face images that may have artifacts. Its effectiveness has been demonstrated on the Color FERET and CMU PIE databases.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제11권11호
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• pp.5506-5521
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• 2017

Three-dimensional video (3DV), as the new generation of video format standard, can provide the viewers with a vivid screen sense and a realistic stereo impression. Meanwhile the view synthesis has become an important issue for 3DV application. Differently from the conventional methods based on depth, in this paper we propose a new view synthesis algorithm, which can employ the correlation among views and warp in the image domain only. There are mainly two contributions. One is the incorporation of sobel edge points into feature extraction and matching, which can obtain a better stable homography and then a visual comfortable synthesis view compared to SIFT points only. The other is a novel image blending method proposed to obtain a better synthesis image. Experimental results demonstrate that the proposed method can improve the synthesis quality both in subjectivity and objectivity.