• Journal of the Institute of Electronics Engineers of Korea CI
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• v.43 no.1 s.307
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• pp.27-34
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• 2006

In this paper, we propose a combined region-based image retrieval system using EHD(Edge Histogram Descriptor) and CLD(Color Layout Descriptor) of MPEG-7 descriptors. The combined descriptor can efficiently describe edge and color features in terms of sub-image regions. That is, the basic unit for the selection of the region-of-interest (ROI) in the image is the sub-image block of the EHD, which corresponds to 16 (i.e., $4{\times}4)$ non-overlapping image blocks in the image space. This implies that, to have a one-to-one region correspondence between ELE and CLD, we need to take an $8{\times}8$ inverse DCT (IDCT) for the CLD. Experimental results show that the proposed retrieval scheme can be used for image retrieval with the ROI based image retrieval for MPEG-7 indexed images.

• Journal of Gifted/Talented Education
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• v.20 no.1
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• pp.61-77
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• 2010

The purpose of this study was to analyze the items that were used in entrance examination for science gifted education center for middle school students by using content analysis and classical item analysis. In content analysis, objective type items exhibited mathematics and physics were dominant. Science giftedness & creativity items were dominant. And essay type items consisted of physics items, have evaluated creative problem solving ability. Item difficulty and discrimination index, on the whole, were appropriate. Comparing with objective type, essay type has higher discrimination index. In correlation analysis between total score and score of each type of items, total score has the highest correlation with essay type items and science giftedness & creativity. It was recommended that mathematics, physics and chemistry items with focusing giftedness & creativity could give some implications for future selection methods of science gifted education center.

• Korean Educational Research Journal
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• v.38 no.1
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• pp.1-16
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• 2017

The third national curriculum had the characteristics to establish guidelines in history textbooks with the basic direction to implement the charter of national Education. At that time, the object of the history education was 'the harmony with the development of the individuals and national development' which was the same that the authorized government aimed at. But the characters and the purpose were repeated without any criticism. Since the third national curriculum was presented in Korean education, the aims of education proposed the 'Korean style democracy'. Essential aims of education are more important than any political issues because academic research is not reflected on nationalism. This trend which is flowing in the education of Korea was strengthened through the education authorities in the statements of 'Deployment of the Governing' or 'guidelines': Especially, the idea and the history education. Despite the curriculum has been amended several times, these problems are not to be gotten rid of. The recently revised curriculum guidelines for history textbook description should improve and find the way to develope the history thinking of students.

• Journal of the Korean School Mathematics Society
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• v.15 no.4
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• pp.719-745
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• 2012

This research is a study on student's understanding fundamental conception of mathematical curriculum, especially in geometry domain. The goal of researching is to analyze student's wrong conception about that domain and get the mathematical teaching method. We developed various questions of descriptive assessment. Then we set up the term, procedure of research for the understanding student's knowledge of geometry. And we figured out the student's understanding extent through analysing questions of descriptive assessment in geometry. In this research, we concluded that most of students are having difficulty with defining the fundamental conception of mathematics, especially in geometry. Almost all the students defined the fundamental conceptions of mathematics obscurely and sometimes even missed indispensable properties. Prior to this study, we couldn't identify this problem. Here are some suggestions. First, take time to reflect on your previous mathematics method. And then compile some well-selected questions of descriptive assessment that tell us more about student's understanding in geometry.

• Journal of Broadcast Engineering
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• v.17 no.1
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• pp.26-36
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• 2012

Since shape of an object in an image carries important information in contents based image retrieval (CBIR), many shape description methods have been proposed to retrieve images using shape information. Among the existing shape based image retrieval methods, the method which employs invariant Zernike moment desciptor (IZMD) showed better performance compared to other methods which employ traditional Zernike moments descriptor in CBIR. In this paper, we propose a new image retrieval method which applies invariant angular radial transform descriptor (IARTD) to obtain higher performance than the method which employs IZMD in CBIR. IARTD is a rotationally invariant feature which consists of magnitudes and alligned phases of angular radial transform coefficients. To produce rotationally invariant phase coefficients, a phase correction scheme is performed while extracting the IARTD. The distance between two IARTDs is defined by combining the differences of the magnitudes and the aligned phases. Through the experiment using MPEG-7 shape dataset, the average bull's eye performance (BEP) of the proposed method is 0.5806 while the average BEPs of the exsiting methods which employ IZMD and traditional ART are 0.4234 and 0.3574, respectively.

• Journal of the Korean Society for Library and Information Science
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• v.52 no.1
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• pp.447-467
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• 2018

Biographical information about people is usually collected and provided by a company or an institute which has a specific standard to select people for service. Recently, user oriented contents service like Wikipedia has started biographical information service, Wikipedia Biography Portal, in which users select people and freely describe about them. This study collected 500 biographical data from three categories of Wikipedia biography portal such as criminals, faculty, and directors. The contents of data from each category were analyzed with the word frequency and the divergence indicator to identify the characteristics of each category. As a result, divergency indicator is effective to represent the differential factors of each category. This study provides word clouds of top 100 word with divergence indicator and top 100 common words of three categories with word frequency as a guide for users to write about a person in these categories and for editors to accept and monitor the biography from users.

• Journal of KIISE:Computing Practices and Letters
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• v.15 no.2
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• pp.98-113
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• 2009

Conventional file systems for harddisk drive cannot be applied to NAND flash memory, because the physical characteristics of NAND flash memory differs from those of harddisk drive. To address this problem, various file systems with better reliability and efficiency have also been developed recently. However, those file systems have inherent overheads for updating the file's metadata pages, because those file systems save file's meta-data and data separately. Furthermore, those file systems have a critical reliability problem: file systems fail when either a page in meta-data of a file system or a file itself fails. In this paper, we propose a self-description page technique and In Memory Core File System technique to address these efficiency and reliability problems, and develop SDFS(Self-Description File System) newly. SDFS can be safely recovered, although some pages fail, and improves write and read performance by 36% and 15%, respectively, and reduces mounting time by 1/20 compared with YAFFS2.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2009.10a
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• pp.595-598
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• 2009

최근 영재 및 영재교육에 관련된 연구가 다방면에서 진행되고 있으며, 초기에 수학 및 과학 분야 위주로 이루어졌던 영재교육은 정보, 발명, 인문, 예술 등의 기타 분야로 점차 확대되어 가고 있다. 사회적으로는 고도화된 정보화 사회로의 진행과 더불어 정보과학에서도 영재교육데 대한 관심과 중요성이 커지고 있다. 그러나 정보과학의 학문적 역사가 짧고 그 범위의 설정이 어려운 만큼 정보과학 분야의 영재교육에 있어서도 대상자의 선발과 교육이 어려운 것이 사실이다. 특히 영재교육 대상자의 선정과 교육에 필수적인 평가 방식에 대한 학문적 연구가 부족하여 교육 방식의 보완과 창의적인 대상자 선발에 있어 개선에 대한 목소리가 높다. 이에 본 연구에서는 여러 형태의 평가 방식 중 관찰평가가 평가도구로서 어떻게 작용하는지 다면 평가의 측면에서 지필평가와 보완적 작용을 하는지에 대해 연구하였다. 이를 위해 2년간의 학습자들의 지필평가 성적과 관찰평가 중 리커트 척도 방식의 체크리스트와 서술형 관찰 기록지 사이의 상관관계를 통계적으로 분석 하였다. 또한 항목간의 상관관계를 알아보기 위해 체크리스트와 서술형 관찰기록지의 하위 항목간의 상관관계를 분석하였다. 연구 결과 체크리스트의 하위항목 분석을 통해서는 태도와 문제해결 능력 간의 상관관계, 수학적인지영역과 문제해결 능력 간의 유의미한 상관 관계를 알 수 있었으며, 서술형 관찰 기록지 분석을 통해서는 투입 프로그램 적응 능력이라 할 수 있는 과정적 영역은 정의적 영역과 인지적 영역의 상관 관계가 중요함을 알 수 있었다. 또한 평가 방식간의 상관 관계는 지필 평가와 관찰 평가의 유의미한 연관성이 없다는 것이 밝혀졌다. 즉, 정보과학 분야 영재교육 학습자의 잠재 능력이나 사회성, 창의성, 문제해결력 등을 평가하기 위해서는 지필평가와 더불어 관찰평가가 반드시 필요하며 다면평가의 측면에서 상호 보완적인 역할을 한다는 것이다.

• Asia-pacific Journal of Multimedia Services Convergent with Art, Humanities, and Sociology
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• v.9 no.4
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• pp.269-277
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• 2019

In this paper, the compatibility analysis on the track record operation center for the regional industry upbringing is presented. The renewable energy sources such as solar, wind and battery energy storage system have been widely spread in these days. Also the requirements on the efficiency, reliability and power demands of these distributed systems are increasing and they can be demands on the construction of the data track record center for renewable energy industries in order to promote the local industries. The analysis on the size of the de-centralized power system are performed based on the technical issues. The necessities, requirements and center goals to meet these missions are presented in the following session. The proposal of the 1 MW operation center construction and operations are presented in the result of the compatibility analysis. And the lists of the required equipments in the operation facilities are suggested to have proper operational capabilities. The results of this research can be applied in the fundamental data to promote the regional renewable industries.

• Journal of Korean Philosophical Society
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• v.126
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• pp.403-422
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• 2013

유사배(劉師培)는 '반청(反淸)'에서 반전통의 '무정부주의'로, 그리고 '친청(親淸)'으로 변절하는 파란만장한 삶을 살았다. "중국민약정의(中國民約精義)"는 유사배(劉師培)가 무정부운동을 하기 전, 즉 1903년에 완성한 저서다. 1903년은 유사배(劉師培)가 고향을 떠나 상해(上海)에서 반만(反滿) 운동을 시작했던 시기이고, 1907년 일본으로 유학가기 전 4년 여 동안 유사배(劉師培)는 반청(反淸) 운동에 적극적이었다. 따라서 "중국민약정의(中國民約精義)"는 무정부주의자들의 이념인 '반전통(反傳統)'의 관점에서 저술된 것이 아님을 알 수 있다. "중국민약정의(中國民約精義)" 서문은 다음과 같은 중요한 의미를 내포하고 있다. 첫째, 유사배(劉師培)가 참조한 루소의 "민약론"은 양정동(楊廷棟)이 일본어판을 보고 중국어로 번역한 "민약론"이다. 둘째, "민약론"의 내용은 널리 알려지지 않았다. 셋째, 원고는 1903년 이전에 완성되었고, 책은 1904년에 출판되었다. 유사배(劉師培)는 "주역"을 통해서는 '군민(君民)의 일체(一體)'를, "상서"를 통해서는 '군민(君民)이 국가의 공동주인'임을 밝혔다. "시"는 '민의(民意)의 표현'이라고 했으며, "춘추"를 통해 군주세습제와 민권(民權) 그리고 민의(民意)에 의해 관료 등용 등을 주장했다. "논어"를 통해서는 군신(君臣)의 대등 관계와 군민의 일체를 다시 강조하고, "맹자"와 "순자"를 통해 군주가 신성불가침의 영역이 아니기 때문에 민의(民意)를 근거로 군주도 바꿀 수 있다고 했다. 유사배(劉師培)의 이러한 주장만 놓고 보면, 중국은 비록 전제군주체제에 있었지만, 사람들은(人民) 민주제도를 향유한 것 같다. 그러나 실제로는 이와는 정반대의 길을 걸었던 것이 중국이다. 문제는 유사배(劉師培)의 주장처럼 루소의 "민약론"에 버금가는 사상과 역사적 사실이 있었음에도 불구하고, 그것을 제도화된 적이 없다는 점이다. 유사배(劉師培)가 "중국민약정의(中國民約精義)"에서 서술한 '민약(民約)'은 치도(治道) 방면과 비슷하다. 그러나 정도(政道) 방면에 대해서는 거의 언급이 없다. 게다가 서술된 '민약'의 내용이 한 번도 제도화된 적이 없다는 점에 대해 아무런 언급이 없다. 결국 비록 "중국민약정의(中國民約精義)"가 중국 전통사상에서 서구의 '민주' 개념을 모색했다는 점에서 높이 평가할 수 있으나, 그것을 제도화하지 못하고 또 치도(治道)에만 치중해 서술한 점이 "중국민약정의(中國民約精義)"의 약점이다.