CHI '86 Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
The vocabulary problem in human-system communication
Communications of the ACM
Tools for reading and browsing hypertext
Information Processing and Management: an International Journal
User misconceptions of information retrieval systems
International Journal of Man-Machine Studies
A self-organizing semantic map for information retrieval
SIGIR '91 Proceedings of the 14th annual international ACM SIGIR conference on Research and development in information retrieval
Graphical fisheye views of graphs
CHI '92 Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Browsing graphs using a fisheye view (abstract)
CHI '93 Proceedings of the INTERACT '93 and CHI '93 Conference on Human Factors in Computing Systems
Communications of the ACM
Fractal views: a fractal-based method for controlling information display
ACM Transactions on Information Systems (TOIS)
Proceedings of the 8th annual ACM symposium on User interface and software technology
Displaying data in multidimensional relevance space with 2D visualization maps
VIS '97 Proceedings of the 8th conference on Visualization '97
Internet browsing and searching: user evaluations of category map and concept space techniques
Journal of the American Society for Information Science - Special topic issue: artificial intelligence techniques for emerging information systems applications
Visualization tools for self-organizing maps
Proceedings of the fourth ACM conference on Digital libraries
An empirical comparison of visualization tools to assist information retrieval on the Web
Journal of the American Society for Information Science and Technology
Visual exploration of large data sets
Communications of the ACM
Improving the visualization of hierarchies with treemaps: design issues and experimentation
VIS '92 Proceedings of the 3rd conference on Visualization '92
Newsmap: a knowledge map for online news
Decision Support Systems - Special issue: Collaborative work and knowledge management
Visualizing Hierarchies and Collection Structures with Fractal Trees
ENC '05 Proceedings of the Sixth Mexican International Conference on Computer Science
Exploring the influence of perceptual factors in the success of web-based spatial DSS
Decision Support Systems
Visualizing decision process on spheres based on the even swap concept
Decision Support Systems
A graphical shopping interface based on product attributes
Decision Support Systems
Expert Systems with Applications: An International Journal
Analysis of terrorist social networks with fractal views
Journal of Information Science
The adaptive web
Analyzing the terrorist social networks with visualization tools
ISI'06 Proceedings of the 4th IEEE international conference on Intelligence and Security Informatics
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Information overload is a critical problem in World Wide Web. Category map developed based on Kohonen's self-organizing map (SOM) has been proven to be a promising browsing tool for the Web. The SOM algorithm automatically categorizes a large Internet information space into manageable sub-spaces. It compresses and transforms a complex information space into a two-dimensional graphical representation. Such graphical representation provides a user-friendly interface for users to explore the automatically generated mental model. However, as the amount of information increases, it is expected to increase the size of the category map accordingly in order to accommodate the important concepts in the information space. It results in increasing of visual load of the category map. Large pool of information is packed closely together on a limited size of displaying window, where local details are difficult to be clearly seen. In this paper, we propose the fisheye views and fractal views to support the visualization of category map. Fisheye views are developed based on the distortion approach while fractal views are developed based on the information reduction approach. The purpose of fisheye views are to enlarge the regions of interest and diminish the regions that are further away while maintaining the global structure. On the other hand, fractal views are an approximation mechanism to abstract complex objects and control the amount of information to be displayed. We have developed a prototype system and conducted a user evaluation to investigate the performance of fisheye views and fractal views. The results show that both fisheye views and fractal views significantly increase the effectiveness of visualizing category map. In addition, fractal views are significantly better than fisheye views but the combination of fractal views and fisheye views do not increase the performance compared to each individual technique.