1. NetVisia: Heat Map & Matrix Visualization of Dynamic Social Network Statistics & Content SocialCom 2011 MIT - Boston, MA Robert Gove, Nick Gramsky, Rose Kirby, Emre Sefer, Cody Dunne, Awalin Sopan, Ben Shneiderman, Meirav Taieb-Maimon Presented by: Nick Gramsky – University of Maryland ngramsky@cs.umd.edu

2. Challenges with Node/Link Diagrams Great Overview for Composition Difficult to analyze Temporally Identifying changes requires multiple pictures Relies on memory

3. STICK Data Set - 2004 STICK Data Set – 2004 Sized on degree

4. STICK Data Set - 2005 STICK Data Set – 2005 Sized on degree What changed? Whose degree increased? Whose degree had a bigger change?

5. Visualizing Network Evolution +

6. +

7. What is NetVisia Tool for Visualizing Network Evolution Abandons Link-Node Diagrams for Heat Maps / Adjacency Matrices Clustering Alignment Any type of network Social Computer Visualize / Analyze / Provide Insight on: Conventional Network Attributes User-defined Node / Edge content Ex: Keywords in co-authorship dataset

8. NetVisia - Overview 2 3 4 1

9. STICK DataSet – Clustered View Nodes – Business concepts & entities Edges – Co-occurrence of terms Analysis shows: Outliers Bad Data Suggests discrete periods for investigation

10. Stick DataSet – Adjacency Matrix Deep dive discrete time period Metrics for node- node relationships Cluster identification 2005

11. Stick DataSet – Adjacency Matrix 20062007

12. 2004 InfoViz Co-authorship Dataset Info-Viz Co-authorship 840 distinct authors 1995 to 2004 Nodes are authors Edges are co-authored papers Clustered & Aligned

13. 2004 InfoViz Co-authorship Dataset Info-Viz Co-authorship 840 distinct authors 1995 to 2004 Nodes are authors Edges are co-authored papers Clustered & Aligned Recognition of behavior pattern Most co-author only one paper

14. 2008 VAST Cell Phone Challenge Cell phone calls in a 10-day period / 12-hour periods Nodes – People Edges – Phone Calls Summary shows cyclical behavior Clustering shows shift in identities of members

15. Challenges / Future Work Challenges Data Structures Future Work Responsiveness Additional Features Edge representation in overview window Tooltips

16. Questions More information: http://www.cs.umd.edu/hcil/netvisia/