• 한국정보기술학회 영문논문지
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• 제9권1호
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• pp.67-76
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• 2019

Recently, with the advent of the software-based society, many organizations have been providing software developing education, such as coding, to Computer Science majors and non-Computer Science majors. When implementing a program, teachers can let students draw a variety of diagrams, such as flowcharts, UML diagrams, and ERD diagrams ahead. As the importance of computational thinking is increasingly emphasized, abstracting algorithms into diagrams is considered an important educational element. In this paper, we examined the visual literacy and abstract/concrete way of thinking of novice programmers in order to analyze factors affecting the abstraction process of drawing diagrams, and how they influence students' ability to understand diagrams and ability to draw. If we understand what factors influence the abstraction process in this study, we can suggest educational alternatives for future strategies in which teachers will teach students.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2005년도 하계학술대회 논문집 Vol.6
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• pp.135-138
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• 2005

HDL(Hardware Description Language) is the most important modem tools used to describe hardware, and becomes important as we move to higher levels of abstraction. The HDL has been made brisk use of in analog design, MEMS device[1-2], process related field as well as digital design. The most important characteristics of HDL is Abstraction which is the strongest tool that extend greatly designer's design ability. In this paper by the Modelling Continuum with hierarchical structure of abstraction, we apply UML(Unified Modeling Language) to SoC Design with HDL UML makes an easy and visual description of the various levels of abstraction, and gives designers good flexible modeling capabilty for SoC Design.

• 컴퓨터교육학회논문지
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• 제11권4호
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• pp.47-58
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• 2008

본 연구의 목적은 웹 기반 학습 환경에서 학습자의 인지양식과 시각적 조직자 (visual organizer) 유형이 전자텍스트 문서에 대한 내용이해 및 구조파악에 어떠한 영향을 미치는지 밝히고자 하는 것이다. 연구를 위하여 대구에 소재한 A 대학교에 재학 중인 126 명을 대상으로, 인지양식검사 결과에 따라 장의존 및 장독립적 인지양식 집단을 구성한 후 각 집단에 '단순축소' 형태와 '추상화' 형태, 두 가지 유형의 시각적 조직자가 포함된 웹 기반 학습 프로그램을 처치하여 결과를 분석하였다. 그 결과, 전자 텍스트 내용이해에 있어서 학습자의 인지양식 및 시각적 조직자 유형은 각각 텍스트 내용이해에 유의미한 영향을 주지 않았으나 텍스트 구조 파악에 있어서 장독립적 학습자가 장의존적 학습자에 비해 전자 텍스트 문서의 구조를 더 잘 파악하는 것으로 나타났다. 인지양식과 시각적 조직자는 구조파악에 대해 상호작용효과가 있는 것으로 나타났는데, 장의존적 학습자는 추상화 형태를 사용했을 때, 장독립적 학습자는 단순축소형태를 사용했을 때, 텍스트 구조파악이 더 효과적인 것으로 나타났다.

• 한국환경교육학회지:환경교육
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• 제22권3호
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• pp.112-124
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• 2009

Visual images are important elements of the communication of environment in secondary school environment textbooks, which dominate classroom approaches to teaching and learning. This study was to analysed the perspectives of pedagogical and social-pedagogic of visual images in 'global warming' unit of six different Korean environment textbooks. Analysis makes use of the dimensions pedagogical functions, content specialization, social-pedagogic relationships, and abstraction of the visual codes. The results showed that most of the visual images in school environment textbooks tend to establish social-pedagogic relationships with students. The results of our study have implications for textbook authors and secondary environment teachers. We suggest that future studies may focus on students' and teacher's interpretation of visual images new secondary environment textbooks.

• 대한안전경영과학회지
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• 제21권4호
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• pp.67-74
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• 2019

Visual inspection is regarded as one of the critical activities for quality control in a manufacturing company. it is thus important to improve the performance of detecting a defective part or product. There are three probable working modes for visual inspection: fully automatic (by automatic machines), fully manual (by human operators), and semi-automatic (by collaboration between human operators and automatic machines). Most of the current studies on visual inspection have been focused on the improvement of automatic detection performance by developing a better automatic machine using computer vision technologies. However, there are still a range of situations where human operators should conduct visual inspection with/without automatic machines. In this situation, human operators'performance of visual inspection is significant to the successful quality control. However, visual inspection of components assembled into a mobile camera module belongs to those situations. This study aims to investigate human performance issues in visual inspection of the components, paying more attention to human errors. For this, Abstraction Hierarchy-based work domain modeling method was applied to examine a range of direct or indirect factors related to human errors and their relationships in the visual inspection of the components. Although this study was conducted in the context of manufacturing mobile camera modules, the proposed method would be easily generalized into other industries.

• 대한수학교육학회지:수학교육학연구
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• 제11권1호
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• pp.89-102
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• 2001

Computer has been regarded as an alternative that could overcome the difficulties in the teaching and learning of mathematics. But the didactical problems of the computer-based environment for mathematics education could give us new obstacles. In this paper, first of all, we examined the application of the learning theories of mathematics to the computer environment. If the feedbacks of the computer are too immediate, students would have less opportunity to reflect on their thinking and focus their attention on the visual aspects, which leads to the simple abstraction rather than the reflective abstraction. We also examined some other Problems related to cognitive obstacle to learn the concepts of geometric figure and the geometric knowledge. Based on the analysis on the problems related to the computer-based environment of mathematics teaching and learning, we tried to find out the direction to use computer more adequately in teaching and learning geometry.

• Journal of Information Processing Systems
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• 제16권6호
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• pp.1424-1436
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• 2020

Although huge progress has been made in current image segmentation work, there are still no efficient segmentation strategies for tree image which is taken from natural environment and contains complex background. To improve those problems, we propose a method for tree image segmentation combining adaptive mean shifting with image abstraction. Our approach perform better than others because it focuses mainly on the background of image and characteristics of the tree itself. First, we abstract the original tree image using bilateral filtering and image pyramid from multiple perspectives, which can reduce the influence of the background and tree canopy gaps on clustering. Spatial location and gray scale features are obtained by step detection and the insertion rule method, respectively. Bandwidths calculated by spatial location and gray scale features are then used to determine the size of the Gaussian kernel function and in the mean shift clustering. Furthermore, the flood fill method is employed to fill the results of clustering and highlight the region of interest. To prove the effectiveness of tree image abstractions on image clustering, we compared different abstraction levels and achieved the optimal clustering results. For our algorithm, the average segmentation accuracy (SA), over-segmentation rate (OR), and under-segmentation rate (UR) of the crown are 91.21%, 3.54%, and 9.85%, respectively. The average values of the trunk are 92.78%, 8.16%, and 7.93%, respectively. Comparing the results of our method experimentally with other popular tree image segmentation methods, our segmentation method get rid of human interaction and shows higher SA. Meanwhile, this work shows a promising application prospect on visual reconstruction and factors measurement of tree.

• 건축역사연구
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• 제3권2호
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• pp.125-141
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• 1994

Alois Riegl's aesthetic theory of visual perception provided one of important conceptual backgrounds for Vienna Art Nouveau architecture. Riegls theory of visual perception consists of geometric style and two-dimensional transformation. Riegl's theory of geometric style is based on the modern aesthetic theory of abstraction, which says that the artistic perfection can be obtained not from a direct imitation of natural objects, but from an abstract transformation of them. Riegl's theory of two-dimensional transformation, on the other hand, aims at obtaining artistic perfection by disintegrating volumetric conditions of natural things into planes and combining the planes thus obtained into another new world of art. These two theories of Alois Rigl's provided an important aesthetical background for the design strategy of 'abstract ornamentaion of two-dimension' in Vienna Art Nouveau architecture. This paper is to review the basic concept of Alois Rigl's theory of geometric style and two-dimensional transformation.

• Journal of Information Technology Applications and Management
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• 제23권3호
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• pp.1-12
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• 2016

Visual representations for concepts in business management are quite challenging, especially those abstract concepts in Accountancy discipline. For example, there might not be a consensus on what to use to represent such abstraction as an asset, liability, or owner equity. This is because asset can be property, estate, resources, equipment, or any tangible or non-tangible valuables. Cognitive science concepts and behavior engagement have been used to develop visual representations for financial data. The concepts include spatial processing, big picture thinking, and metaphor. Review of past studies together with a brief research plan to test the usability for learning of four new augmented reality 0visuals are provided in the present paper.

• 한국정보통신학회논문지
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• 제20권3호
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• pp.549-557
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• 2016

효과적인 시각화는 일반적으로 대용량의 디버깅 정보와 프로그램의 추상적 수행모델을 표현하는 것이 중요하다. 본 논문에서는 스레드들간의 논리적 병행성 관계를 나타내는 부분순서 수행그래프를 이용하여 내포병렬성과 임계구역을 가진 OpenMP 병렬 프로그램의 수행양상과 경합정보의 효과적 디버깅을 위해서 효과적으로 제공하는 추상적 시각화 도구를 제안한다. 본 도구는 수행중 추적선택 기법으로 시각화 정보를 위한 공간적 복잡성을 줄이고, 추적된 시각화 정보에 프로그램의 내포병렬성과 임계구역 동기화를 위한 그래프 추상화를 제공하여 시각적 복잡성을 해결한다. 그래프 추상화를 통한 스레드들간의 부분순서 관계와 경합탐지 정보는 프로그램의 제어흐름과 경합의 위치를 구조적으로 파악할 수 있게 하므로 프로그램 수행의 이해와 경합 탐지 및 수정에 효과적이다.