• Journal of Educational Research in Mathematics
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• v.17 no.1
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• pp.1-31
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• 2007

Negative numbers have been one of the most difficult mathematical concepts, and it was only 200 years ago that they were recognized as a real object of mathematics by mathematicians. It was because it took more than 1500 years for human beings to overcome the quantitative notion of numbers and recognize the formality in negative numbers. Understanding negative numbers as formal ones resulted from the Copernican conversion in mathematical way of thinking. we first investigated the historic and the genetic process of the concept of negative numbers. Second, we analyzed the conceptual fields of negative numbers in the aspect of the additive and multiplicative structure. Third, we inquired into the levels of thinking on the concept of negative numbers on the basis of the historical and the psychological analysis in order to understand the formal concept of negative numbers. Fourth, we analyzed Korean mathematics textbooks on the basis of the thinking levels of the concept of negative numbers. Fifth, we investigated and analysed the levels of students' understanding of the concept of negative numbers. Sixth, we analyzed the symbolizing process in the development of mathematical concept. Futhermore, we tried to show a concrete way to teach the formality of the negative numbers concepts on the basis of such theoretical analyses.

• Cartoon and Animation Studies
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• s.23
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• pp.51-66
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• 2011

Rodolphe Toepfer invented cartoon frames and following cartoonists developed this idea. But cartoon frames defineed before in historical documens and artifacts give a hint of the structure of a cartoon frame. In historical documents and artifacts show various form of the quadrangle frames. Now we see the cartoon frame is a result of historical things. Artists input in the framework, dubbed as a cartoon frame, all kinds of icons that belong to cartoon's language. Readers accept messages that artists want to say by considering this formation. Although cartoon frames are similar to camera frames they are more flexible than other general frames. By this flexibility, different shapes of frame influence reader's experiences. Applying these various cartoon frames extends function of framework. And if used by many cartoonists, you gradually get a rule. A time-tested rule standardizes it. In theory, shapes of frame are changeable in many ways. But frequently used frames are standardized in just one formation. In the process, I think it is a tacit rule of human lifestyle. That is a quadrangle. Why is the quadrangle chosen by a long term polished rule of frame? This study is to realise why a quadrangle form is used and its relation to human lifestyle.

• The Journal of the Korea Contents Association
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• v.14 no.6
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• pp.428-441
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• 2014

The Han river flowing the southern boundary of Hangyang city wall was known for scenic remote villa spot. This research is about a study on the historical and cultural landscape value of Apgujung built on hills of the Han river by Han Myeong Hoe in the mid-15th century. The results are as follows. First, the Han river has been a cultural poetical place. Second, the pavilion of west river was built as thatched roof at 1454-1456, while that of east river was erected as grand villa at 1469-1473. Third, there are characteristics of periodical landscape and origin was included on historical and cultural landscape, therefore, Apgujuing-dong has been recognized with the story. Han river where Apgujung was built has beautiful water landscape in spite of the landscape of modem downtown. Fourth, there are placeness and Han river of main landscape text streams nearby Apgujung site. Historical and cultural landscape of Apgujung should be changed, but, the landscape value could be progressed with the application as cultural contents while the Han river flows. It could be cultivated on the application of various culture contents and story of Apgujung when the historical landscape of water system be restored in Han river.

• Archives of design research
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• v.17 no.4
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• pp.365-374
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• 2004

Design history has been thought a secondary studies for design practice. Design historians have been accused of being unimaginative and unadventurous in sticking to dominant types of design such as products, furnitures and graphics. But Design history is still young subject which could be exploited in wide range and topics, and it should be thought a lot of researches could be done. Under this consciousness and circumstance, this study reviews the situation and perspective of design history studies in Korea by critical search on canonical books in the area such as Pevsner's, Banham's, Hesket's, Sparke's, and Chung's those translated into Koreans and Korean originals.

• Journal of Educational Research in Mathematics
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• v.27 no.4
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• pp.727-745
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• 2017

This study investigated the Aristotle's continuity and the historical development of continuity of function to explore the differences between the concepts of mathematics and students' thinking about continuity of functions. Aristotle, who sought the essence of continuity, characterized continuity as an 'indivisible unit as a whole.' Before the nineteenth century, mathematicians considered the continuity of functions based on space, and after the arithmetization of nineteenth century modern ${\epsilon}-{\delta}$ definition appeared. Some scholars thought the process was revolutionary. Students tended to think of the continuity of functions similar to that of Aristotle and mathematicians before the arithmetization, and it is inappropriate to regard students' conceptions simply as errors. This study on the continuity of functions examined that some conceptions which have been perceived as misconceptions of students could be viewed as paradigmatic thoughts rather than as errors.

• Journal of Korean Society of Archives and Records Management
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• v.17 no.4
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• pp.109-126
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• 2017

This study deals with the theoretical analysis of important audiovisual archives, specifically regarding the historical context of the given theme. The study will feature a historical review of the concept, which is the basis for audiovisual archive research, followed by the specificities of audiovisual archives in sharp contrast to public archives, libraries, and museums. Audiovisual archives will also be covered primarily regarding documentaries as well as places and institutions. The study will conclude with various issues of audiovisual archives in today's digital age. The study hopes to contribute to the growth of audiovisual archive research in Korea and the establishment of various audiovisual archives that will be addressed on a national level both in policy and in practice.

• Journal of Digital Contents Society
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• v.16 no.5
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• pp.699-706
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• 2015

Never Ending Story is an animation work about the stories of the Japanese Sex Slavery Victims who were taken by the Japanese military and forced to sexual slavery, which tormented them with painful memories all their lives. This animation work stimulates the critical perspectives of the audiences in order to ensure a history-based approach based on facts. And, unlike general character animation works which pursue immersion and empathy through illusion of life that are created by the characters, this work demands the audiences to contemplate on historical facts described in the work and make their own judgements. In order to serve these purposes, this work is characterized by its aesthetics properties and elements such as 'sympathy', 'typification', and 'alienation effect'. And, these elements effectively deliver the reality of historical facts that cannot be denied in a chronological narrative. Therefore, this study would sufficiently be of a value in reviewing the diversity in expression and the methodologies used in them, let alone the significance of the theme itself.

• The Journal of the Korea Contents Association
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• v.19 no.1
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• pp.472-483
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• 2019

Why can't we be free from diverse crises threatening our lives in a high-tech future society? Disasters interrupt habitual and institutionalized patterns of behavior and bring about a kind of social shock to make people follow social and individual changes. An interesting fact revealed in the study finding is that the role of disaster management control tower was proper during the Great Flood ofthe Eulchuk Year(1925) and the unified disaster management system facilitated smooth cooperation with relevant authorities. Also, motivating disaster management organizations positively influenced organizational commitment. This implies that if we constantly ask to improve current institutions by introspecting and learning, based on historical records, we may be able to find insights for a safe society of the future.

• Journal of Korea Entertainment Industry Association
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• v.13 no.5
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• pp.83-89
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• 2019

Zhang yimou's film "the shadow" adopts a lot of modern literary symbolic content in the story structure. The novel has been greatly modified, abandoning the setting of the original work and making up the historical background of the story, thus completing the discourse practice of aerial literature rather than historical literature. The film expresses the historical story poetically and even writes the personal mind. In this way, the audience's sense of substitution is increased, and a large number of traditional Chinese cultural symbols are adopted visually. In terms of clothing, the most traditional is sought, which advocates loyalty to history, and adds cultural connotation and depth. The audience can feel the bold and unfettered artistic creation spirit of the main creator, as well as the novel and unique visual expression style, which makes his works have both traditional visual perception and modern story content. The combination of traditional vision and modern drama forms a new visual and cultural experience.

• Journal of Energy Engineering
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• v.3 no.2
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• pp.151-158
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• 1994

MHD(MagnetoHydroDynamic)발전의 원리와 기술 개발의 역사적 배경을 조감하고, 세계적인 개발동향을 살펴 기술 개발의 방향과 앞으로의 가능성을 전망하였다.