• 한국수학교육학회지시리즈A:수학교육
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• 제41권1호
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• pp.45-58
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• 2002

This study was conducted to investigate the gender-related effects of two instructional programs on spatial visualization skills of ninth grade students. Two instructional programs were developed for this study: a web-based virtual reality program and a paper-based program. 194 ninth graders from two middle schools in Seoul participated in this study. Six classes were divided into experimental groups and control groups. The Middle Grades Mathematics Projects (MGMP) Spatial Visualization Test was used to measure spatial visualization skills. The data analysis indicated that both the web-based and paper-based programs were effective to improve spatial visualization skills to treatment groups. Although boys'test mean scores were higher than girls' in the pretest, when deleting the effect of covariance of pretest, there were no statistical significance in the post-test. Girls in the treatment groups favored the paper-based spatial visualization program. These results imply that spatial training may benefit girls' performance more than that of boys and mode of instructional programs can create gender-related differences regarding spatial visualization skills.

• 정보과학회 논문지
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• 제44권3호
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• pp.332-337
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• 2017

IFC 국제표준 규격은 EXPRESS 언어기반의 STEP 스키마 구조로 기술되어 있으므로 BIM 협업에 참여하는 주체자들이 BIM 모델링 형상정보를 공유하는데 접근성이 용이하지 않음을 확인할 수 있었다. IFC 내에 정의된 BIM 모델링 형상정보를 검토하기 위해서는 데스크탑 PC에 IFC 뷰어 어플리케이션을 설치하여 STEP 구조를 파싱하고 3D 가시화를 위한 형상구성 처리를 해야 하기 때문이다. 따라서 IFC 정보모델을 파싱하여 완전한 3D 모델링 형태의 정보구조로 변환하여 web 클라이언트에서 가시화가 용이하도록 경량화 데이터 구조로 설계하였으며, 실험결과 약 40%의 감량효과가 나타났으며, PC에서 스마트폰에 이르기까지 WebGL을 지원하는 모든 web browser에서 동일한 품질의 3D 렌더링 결과를 확인할 수 있었다. 시공 프로세스가 끝난 후 완성된 IFC 데이터를 기반으로 web 표준에 관한 응용연구를 진행한다면 일반 건축물의 유지관리에서 실내공간 위치기반 서비스에 이르는 여러 분야에 활용이 가능할 것이다.

• 지능정보연구
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• 제8권2호
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• pp.159-175
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• 2002

웹 마이닝은 e-Business 환경하에서 존재하는 대량의 웹 데이터에 데이터 마이닝 기법을 적용하여 유용하고 이해 가능한 정보를 추출해내는 과정을 의미하는데, 성공적인 e-Business전개를 위한 핵심적인 기술이다. 본 논문은 인공지능 기법에 기반한 웹마이닝 기술을 활용하여 e-Business상의 온라인 고객의 특성을 분석할 수 있는 data visualization system과 구매 판매 예측시스템의 효과적인 구조와 핵심적인 분석절차를 제안하였다.

• Educational Technology International
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• 제11권2호
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• pp.1-24
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• 2010

The study aimed to investigate the differential effects of visual and verbal scaffoldings on web-based problem solving performance. A quasi-experiment with 143 high school students in South Korea was administered. Each student's visualization tendency score was obtained at the beginning of the study. Based on the visualization tendency scores, students were divided into two groups; low and high level visualization tendency groups. Then each group was split in half and randomly assigned to one of the two lessons - one with visual scaffolding and the other with verbal scaffolding. The contents of the two lessons were the same. All students' performance was measured through an essay assignment for a problem solving at the end of the lesson. The result showed that the visual scaffolding group outperformed the verbal scaffolding group (F=22.54, p<.01), regardless of each student's visualization tendency level. The effect size was 0.81, indicating high practical significance. There was no statistically significant interaction effect between scaffolding modalities and students' visualization tendency levels. These findings imply that visual scaffolding is an effective strategy to promote students' problem solving performance.

• 한국인터넷방송통신학회논문지
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• 제8권5호
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• pp.57-63
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• 2008

최근 센서 네트워크에서 수집된 다양한 상황 정보를 웹을 통해 지도상에 도시하는 SWE(Sensor Web Enablement) 연구가 OGC(Open Geospatial Consortium)를 중심으로 진행되고 있다. OGC SWE WG(Working Group)에서는 실시간으로 시공간에서 발생하는 영상 및 센싱 데이터 등에 대한 인코딩과 웹 서비스를 지원하는 표준을 정의하고 있다. 본 논문에서는 이동 물체에서 획득한 실시간 센싱 데이터를 도시하기 위해 지도 상의 이동 노느에 GPS 데이터와 센싱 데이터를 맵핑하여 2 차원 지도에서 위치 기반의 센성 데이터 가시화 방안을 제안한다. 이를 위해 먼저 2 차원 지도에서 위치 기반의 센싱 데이터 가시화하기 위해 위치 정보를 지도의 좌표로 변환하는 알고리즘과 처리 절차를 제시한다. 그리고 이를 검증하기 위해 이동 노드의 GPS 데이터와 센싱 데이터를 수집하여 2 차원 지도 상에서 도시하는 프로그램을 설계하고 구현한다. 이를 통하여 센서 네트워크로부터 수집된 실시간 동영상이나 센싱 데이터 정보를 웹 기반의 지도 상에서 효과적으로 가시화하는 것을 확인하였다.

• 한국멀티미디어학회논문지
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• 제20권8호
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• pp.1216-1223
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• 2017

Because of the open data in public domains, it is easy to collect the public data. However, people find difficulty in visualizing the data in material that they actually want. Especially, A map is a difficult material to do the visualization work, without using the specific tools and learning. Therefore, in this paper, we proposed an interface tool for map data visualization that user can easily visualize various national statistics data on the map. We designed the interface by classifying the properties of the map systematically, focusing on the completion and convenience for making the map. After that, we developed a web-based application using D3.js. After user evaluation, we found that our application can visualize the map more quickly and completely than any other web interfaces for map data visualization. Users also found a higher satisfaction in operating convenience.

• 대한화학회지
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• 제53권2호
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• pp.166-174
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• 2009

양자화학에는 추상적이거나 비직관적인 개념이 많이 존재하여 학생들이 이해하기에 어려움 을 준다. 다행히, 전통적인 강의실에서의 강의를 보조할 멀티미디어 웹 응용프로그램을 제작할 강력한 도구들이 웹 기술의 발전으로 많이 생겼다. 이 논문에서는 이 문제를 다루는 한 방안으로서 쇽웨이브 기술을 이용하여 웹 브라우저 상에서 쌍방향 시뮬레이션과 시각화를 동시에 해결하는 방법을 제시한 다. 여러 예를 통하여 어떻게 쇽웨이브 기술의 특성을 이용하여 웹에 기반을 둔 학습 자료를 용이하게 개발하는가를 보여준다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제14권2호
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• pp.889-906
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• 2020

Analysis of multi-physics systems and the visualization of simulation data are crucial and difficult in computational science and engineering. In Korea, Korea Institute of Science and Technology Information KISTI developed EDISON, a web-based computational science simulation platform, and it is now the ninth year since the service started. Hitherto, the EDISON platform has focused on providing a robust simulation environment and various computational science analysis tools. However, owing to the increasing issues in collaborative research, data format standardization has become more important. In addition, as the visualization of simulation data becomes more important for users to understand, the necessity of analyzing input / output data information for each software is increased. Therefore, it is necessary to organize the data format and metadata for the representative software provided by EDISON. In this paper, we analyzed computational fluid dynamics (CFD) and computational structural dynamics (CSD) simulation software in the field of mechanical engineering where several physical phenomena (fluids, solids, etc.) are complex. Additionally, in order to visualize various simulation result data, we used existing web visualization tools developed by third parties. In conclusion, based on the analysis of these data formats, it is possible to provide a foundation of multi-physics and a web-based visualization environment, which will enable users to focus on simulation more conveniently.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제18권8호
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• pp.2316-2332
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• 2024

In this paper, we introduce a web-based system that leverages the capabilities of the ρ(rho)-algorithm, which is a Structure Information Control Net (SICN)-oriented process mining algorithm, with open-source platforms, including Django, Graphviz, and Cytoscape, to facilitate the rediscovery and visualization of business process models. Our approach involves discovering SICN-oriented process models from process instances from the IEEE XESformatted process enactment event logs dataset. This discovering process is facilitated by the ρ-algorithm, and visualization output is transformed into either a JSON or DOT formatted file, catering to the compatibility requirements of Cytoscape or Graphviz, respectively. The proposed system utilizes the robust Django platform, which enables the creation of a userfriendly web interface. This interface offers a clear, concise, modern, and interactive visualization of the rediscovered business processes, fostering an intuitive exploration experience. The experiment conducted on our proposed web-based process discovery system demonstrates its ability and efficiency showing that the system is a valuable tool for discovering business process models from process event logs. Its development not only contributes to the advancement of process mining but also serves as an educational resource. Readers, students, and practitioners interested in process mining can leverage this system as a completely free process miner to gain hands-on experience in rediscovering and visualizing process models from event logs.

• 산경연구논집
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• 제11권7호
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• pp.41-49
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• 2020

Purpose: The purpose of this study is to recognize the role and necessity of public data visualization through prior research, investigation, and data verification processes. In addition, this study intends to check what factors should be considered in order to visualize data on the mobile web. Through this process, by identifying the cognitive load affecting information visualization by type, as a result, I would like to propose an effective information visualization method to effectively deliver public data related to government policies. Research design, data and methodology: In this study, we analyzed the case of information visualization according to infographics, which has been widely used in the public field among various visualization methods. For this study, a questionnaire survey was conducted for young people in their 20s and 30s with the highest mobile usage rate. Results: Based on the results, IPA (Importance Performance Analysis) was performed to conduct cognitive load test tools for information visualization of public data and confirmed the implications for each type of infographics. Conclusions: As a result of research, in order to efficiently deliver public data on the mobile web, first, it is necessary to construct a visual screen that can be easily identified through clear data. Appropriate graphic elements can be used according to the type to make it easier for users to acquire and understand information. Second, it is necessary to provide useful content in visualizing information. Third, in order to efficiently transmit information and increase understanding of data, it is necessary to visualize information that can induce interest in data and form metaphors. Fourth, it is necessary to visualize information to reduce cognitive load in terms of physical and mental aspects in order to accommodate users' comfortable information. Fifth, in order to effectively deliver public data, it is necessary to compose contents and information that are easy for users to understand. This study examines effective information visualization methods to increase the communication effect of public data in response to changes in the data-based intelligent information society and suggests implications for each type considering cognitive loads to help future public institutions to communicate and accept information.