1. Online Chat Visualization Mahesh B Mungara

2. Chatting With A “Purpose”  Lack of support for chatting with a purpose  Three major requirements -Need of Chat History -Importance of Establishing Common ground -Anonymity and awareness issues etc…  Yahoo Monsters Inc. IMVironment example

4. Chat History in VS  Why Chat History becomes important in VS?  Puts the current chat in context  Establishment of Common Ground  Late joiners  Help Teachers Evaluate students

5. Features Of The Current Tool  Transcribing the chat logs  Use of scrollbar to visualize them  Fisheye views-navigating through info mural  Topic searches and multiple searches  Dynamic searches  Sender information  Overview of who spoke how much

6. Pros & Cons  Overview+ detail  Use of empty space in scrollbar  Integration of chat history into the chat window  Effective topic searches that help identify items of interest in the chat history  Dynamic searches that obviate the necessity of explicit searching  Encoding of sender information  Implementation issues  Scale issues

7. Scale Issues  People scale-2 pixels per person  Message scale(fares well) Each overlap accounts for 400 messages With gray scale shading 256*400=102400 Average number of messages for 1 to 1 chat 3 messages per minute So supports non-stop chatting for 20 days Use of multi-level zooming techniques

8. Future Work  Dynamic searches based on topic databases  Dynamic building of topic databases  Using length of lines to indicate message importance  Building topic threads basing on dynamic searches  Imposing semantic structure on the Chat history  Incorporating timing information

9. Many Thanks to Dr.McCrickard and Dr.North Questions ????????