Visualizing LiveNet with ENCCON Model

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Visualizing LiveNet with ENCCON Model

• Quang Vinh Nguyen
• Computer Systems Department
• Faculty of Information Technology
• University of Technology, Sydney

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ENCCON Model

• ENCCON Enclosure Connection approach
• Enclosure use enclosure to present the
  hierarchical structures
• Connection display structures using node-link
  diagrams
• Objectives
• Enhance the usability of display space
• Improve the perception node-link diagrams to
  show the relationships

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Enccon ModelGeometrical Layout

• Define the position of all vertexes in 2D
• Each vertex is bounded by a rectangular local
  region
• Position of the vertex is at the centre of the
  rectangle
• Each sub-hierarchy is drawn restrictedly within
  the bounded rectangle

An Example of Geometrical Layout of ENCCON
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Enccon ModelGeometrical Layout
A very large size data set (approximately 11000
nodes)
A medium large size data set (approximately 190
nodes)
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Enccon ModelImproved Geometrical Layout (100
Space Efficiency)
A medium large size data set (approximately 190
nodes)
The Complete Java Documentations File System
(approximately 10000 nodes)
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Enccon ModelNavigation and Interaction

• Apply a new focuscontext visualization
  technique.
• Independent to the layout algorithm.
• Display both detail-view and context-view using
  semi-transparency.
• Detail-view entire display area
• Context-view smaller window at the background
• Only one view is active at a time ? other view
  becomes semi-transparent.
• Animation is applied to each interaction ?
  preserve mental maps.

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The LiveNet System

• A knowledge management and enterprise
  collaborative tool.
• Application in learning environment
• Allow users to create digital workspaces for
  their activities
• Provides the flexibility to customise workspaces
• Based on a meta-model
• Stored as a relational database
• Provide the flexibility to setup collaborative
  workspaces

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LiveNets Interface
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Limitation of LiveNets Interface

• Hardly to see the relations.
• Hierarchical Relations
• Accessing Relations
• Participating Relations
• Sharing Relations
• Lack of the meaningful visual presentation of
  various types of the logical relationships.
• Difficult for non-expert users to understand the
  logical relationships
• Data objects in a working-window
• Data objects across different working-window
• Unable to display large scale of information.

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Objectives of the Visual Interface

• Provide an optimized interactive graphic
• Interactively view, navigate, and manipulate the
  entire information
• Improve the user understanding of underlying
  structure and internal relationships.
• Provide the overall context view.
• Handle large amount of information.

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LiveNets Visual Interface

• Use J2EE to control the interaction between the
  Visual Applet and database.
• Layout use ENCCONs algorithm.
• represent the structure of collaborative
  workspace and logical relationship.
• Nodes represent the objects
• Edges represent the relationships
• Visualize as Cluster Graph
• Structure of workspace hierarchical display
• External and Logical relationships extra edges
• Different types of relations are shown using
  distinctive attributes.

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LiveNets Visual Interface (cont)

• The visual interface provides
• Overall view of the entire workspace structures.
• Detail view (all actions, properties, and
  associated attributes of a learning-element)
• Relations among learning-elements using
  semi-transparency
• Why ENCCON? space efficiency, fast,
  aesthetically nice.
• ? handle large and complex workspace
• Navigation new focuscontext viewing technique
  using semi-transparency.

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LiveNet Demonstrationhttp//138.25.13.2108000/l
n4-1/
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Conclusions

• Present the ENCCON model.
• Layout enclosureconnection approach
• Navigation focuscontext using semi-transparency
• Present LiveNets Visualization.
• Supporting knowledge management and collaboration
• Assistant interface for viewing and manipulating
  information
• Improving the user understanding of underlying
  structure and internal relationships

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