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LifeLines:Visualizing Personal Histories

LifeLines:Visualizing Personal Histories. Plaisant, Milash, Rose, Widoff, Shneiderman. Presented by Girish Kumar and Rajiv Gandhi. Outline. Overview + Detail LifeLines Example -- Dept. of Juvenile Justice Related Work Conclusion and Critique. Favorite Sentence.

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LifeLines:Visualizing Personal Histories

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  1. LifeLines:Visualizing Personal Histories Plaisant, Milash, Rose, Widoff, Shneiderman Presented by Girish Kumar and Rajiv Gandhi

  2. Outline • Overview + Detail • LifeLines • Example -- Dept. of Juvenile Justice • Related Work • Conclusion and Critique

  3. Favorite Sentence “An intuitive approach to visualizing histories is to use graphical time scales.”

  4. Overview + Detail • Provides multiple views • overview for orientation • detailed view for further work • e.g.- virtual space on the desktop

  5. LifeLines • Maps histories on graphical time scale • Overview screen displays multiple facets of data • Stories or aspects are lines • Periods correspond to changes of size or color along the line • Discrete events are marked by icons • Set of buttons gives access to general information

  6. An Example - Department of Juvenile Justice (DJJ)

  7. Key Features • Interrelationships between periods or events on the lines can be highlighted • Line thickness indicates the severity of offence • Color indicates the depth of penetration in the system

  8. Benefits of LifeLines • Users are less likely to miss information • Facilitates the spotting of anomalies and trends • Streamlines access to details • Tailorable to various applications

  9. Issues • Representing large amount of information at overview level • Efficient space utilization • Integration with data entry techniques

  10. Browsing Hierarchical Data With Multi-Level Dynamic Queries And Pruning Kumar, Plaisant, Shneiderman

  11. Key Ideas • Browse large hierarchies and view it at different levels • Dynamic Queries used to filter nodes at each level of the tree • Pruning of sub-trees of uninteresting nodes to get more compact views

  12. PDQ Tree Browser • Tree structure is visualized in two tightly-coupled views - Overview and Detailed • User selectable dynamic query panel • Tree structure changes only when the current lowest level of the tree is changed • Pruning is done to eliminate non-matching subtrees

  13. An Example - The University Finder

  14. Key Features • Helps locate interesting parts of large trees • Tightly coupled overview and detailed views • Easy to use interface

  15. Limitations • Interface fine tuned for tree of depth 5 • Manual selection and pruning not supported • Doesn’t support all boolean queries • Does not utilize available space efficiently • Change in layout not animated • Doesn’t support searching upwards in the tree

  16. Conclusions and Critique • Time is an effective variable to display personal histories • Overview + Detail • maintain overall context • navigate data details • Overview may become cluttered with large amounts of data • Need for better space utilization techniques

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