• Journal for History of Mathematics
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• v.24 no.4
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• pp.97-118
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• 2011

This study aimed finding effective models for the teaching the concept of function. We selected two models. One is discrete model which focuses on the 'corresponding relation of the elements of the sets(domain and range). The other is continuous model which focuses on the dependent relationship of the two variables connected in variable phenomenon. A vending machine model was used as a discrete model, and a water bucket model was used as a continuous model in our study. We taught 2 times about the concept of function using two models to the 60 students (7th grade, 2 classes) living in Taebak city, and tested it twice, after class and about 3 months later. A vending machine model was helpful in understanding the definition of function in the 7th grade math textbook. Also, it was helpful to making concept image and to recalling it. On the other hand, students who used the water bucket model had a difficultly in understanding the all independent variables of the domain corresponding to the dependent variables. But they excelled in tasks making formula expression and understanding changing situations.

• Journal of KIISE:Databases
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• v.30 no.2
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• pp.145-156
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• 2003

Most of the content-based image retrieval systems focuses on similarity-based retrieval of natural picture images by utilizing color. shape, and texture features. For the neuroscience image databases, we found that retrieving similar images based on global average features is meaningless to pathological researchers. To realize the practical content-based retrieval on images in neuroscience databases, it is essential to represent internal contents or semantics of images in detail. In this paper, we present how to represent image contents and their related concepts to support more useful retrieval on such images. We also describe the operational semantics to support these advanced retrievals by using object-oriented message path expressions. Our schemes are flexible and extensible, enabling users to incrementally add more semantics on image contents for more enhanced content searching.

• Archives of design research
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• v.14
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• pp.221-230
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• 1996

The paper aims to identify how Korean national image can be refined through the strategic use of design. There has been a distinctive need for refining the national image in Korea in recent years in accordance with the rapid growth of the nation's wealth. A comprehensive definition on nation image was prepared through a course of library search. The role of design in the establishment of national image was identified as a result of case study on the United States of America and Japan. Major problems were revealed through an analysis of current states of Korean national image. Finally, strategic suggestions for refining Korean national image have bl'en prepared in relation to the overall direction and specified guidelines.

• Journal of the Korean Society of Clothing and Textiles
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• v.24 no.8
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• pp.1197-1208
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• 2000

The purpose of this study was to find out the effects of the accord between consumers benefit factors and attribute factors of brand image on brand attitude. This study was based on Kellers conceptualizing model of brand image. The subjects were 605 working women in their twenties living in Seoul, Korea. The data were analyzed by Euclidian distance model, ANOVA of repeated measures, regression, F-test by Extra Sum of Squares Principle. The results were as follows. 1. There were significant differences among the brands and among the segmented groups in the accord between benefit factors and attribute factors of brand image and in the brand preference. Moreover there were significant interactions between the brands and the segmented groups in the accord between benefit factors and attribute factors of brand image and in the brand preference. 2. There were significant effects of the accord between benefit factors and attribute factor of brand image on brand attitude. 3. There were significantly different effects of the accord between benefit factors and attribute factors of brand image on brand attitude among the segmented groups.

• Cartoon and Animation Studies
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• s.51
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• pp.391-411
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• 2018

The purpose of this thesis is to examine ontology of digital photo image based on a Simulacre concept of Gilles Deleuze & Jean Baudrillard. Traditionally, analog image follows the logic of reproduction with a similarity with original target. Therefore, visual reality of analog image is illuminated, interpreted, and described in a subjective viewpoint, but does not deviate from the interpreted reality. However, digital image does not exist physically but exists as information that is made of mathematical data, a digital algorithm. This digital image is that newness of every reproduction, that is, essence of subject 'once existing there' does not exist anymore, and does not instruct or reproduce an outside target. Therefore, digital image does not have the similarity and does not keep the index instruction ability anymore. It means that this digital image is converted into a virtual area, and this is not reproduction of already existing but display of not existing yet. This not-being of digital image changes understanding of reality, existence, and imagination. Now, dividing it into reality and imagination itself is meaningless, and this does not make digital image with technical improvement but is a new image that is basically completely different from existing image. Eventually, digital image of the day passes step to visualize an existent target, nonexistent things have been visualized, and reality operates virtually. It means that digital image does not reproduce our reality but reproduces other reality realistically. In other words, it is a virtual reproduction producing an image that is not related to a target, that is to say Simulacre. In the virtually simulated world, reality has an infinite possibility, and it is not a picture of the past and present and has a possibility as the infinite virtual that is not fixed, is infinitely mutable, and is not actualized yet.

• The Journal of the Korea Contents Association
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• v.9 no.1
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• pp.293-303
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• 2009

The purpose of this study is to review causal effect of corporate image, customer royalty on switching cost. Specifically, giving managerial view point to build strategic CRM is major purpose of this research with finding out how the switching cost influences to the corporate image and customer loyalty deciding customer's desire of repurchase and knowing the important factors of corporate image. The result of this study is that switching cost has an effect on corporate image as the important factors. Also corporate image influences on customer loyalty.

• Journal of Educational Research in Mathematics
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• v.15 no.1
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• pp.39-56
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• 2005

This paper provides an analysis of a survey on high achieving students' under-standing of continuity of function. The purposes of the survey in this paper were to identify high achieving students' concept images of continuity of function in the way of Tall & Vinner(1981). The students' individual written answers were collected and task-based, semi-structured individual interviews with 5 students were videotaped. Students were asked to explain their under-standing or reasoning about continuity of function. Five types of the concept images were identified in the analysis. Obvious discrepancy of results between this study and Tall & Vinner(1981)'s were pointed out. It is very likely that the differences in results drawn in both studies are results of the different orientations of the textbooks in terms of their degree of emphasis on the concept definition of continuity of function.

• Communications of Mathematical Education
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• v.24 no.1
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• pp.49-65
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• 2010

The purpose of this study is to encourage the role of domain to consider the teaching of the concept of functions in modeling real situations. To do this, it is analyzed that how to introduce the concept of functions and linear functions in textbooks treated in the 1st grade and the 2nd grade of middle school. This study also reviewed the role of domain in representational activities for modeling real situations using linear functions. In these reviews, it found that many textbooks do not consider the domain in the equations of functions and these graphs and several text books used linear functions for modeling real situations which are not represented by linear functions contextually. It is concluded that the domain of function is an important concept that will be considered any representational activities for functions.

• The Optical Journal
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• s.122
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• pp.32-33
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• 2009

• Communications of Mathematical Education
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• v.15
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• pp.147-152
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• 2003