2. 1736 -Louis Euler: Mathematician
7 Bridges of Königsberg
Q. Can someone cross every bridge and return to the same spot?
A. No, odd number of bridges.
Node
Edge
Mathematics:
Graph Theory

3. 1800’s: Sociology and Psychology
Social psychology (focus: small groups)
Psychology
(focus: the individual)
Sociology
(focus: society)
Auguste Comte: unit of analysis = FAMILY
Georg Simmel: society is interaction among individuals
Membership in groups imposes obligations, provides benefits

4. 1930’s: Jacob Moreno - Psychologist
Interpersonal Relations
Journal: Sociemetry

5. 1930’s: Jacob Moreno - Psychologist

6. Growth of Network Studies

7. Sociology: Smoking

8. Sociology: Obesity http://www.nejm.org/doi/full/10.1056/NEJMsa066082

9. Academia: CEOs & Boards

10. 1994: 6 Degrees of Kevin Bacon

11. 6 Degrees of Kevin Bacon
Created by three college students at Albright College in Pennsylvania
while they were watching Footloose.

12. LinkedIN: InMaps

13. LinkedIN: InMaps

14. Facebook

15. Twitter: Social Network Analysis

16. Twitter: Pew Research

17. Twitter: Pew Research

18. Undirected - Directed
Undirected
Directed
One-way street
Org Hierarchy

19. Business Applications

20. Organizational Design

21. Organizational Design

22. Wearable Sensors

23. Companies: Activate Networks

24. Companies: Activate Networks

25. Companies: Employee Capital

26. Companies: maven7

27. Companies: maven7

28. Companies: maven7

29. Companies: KXEN

30. Companies: KXEN

31. Company: Red Owl Analytics

32. Company: Social-3

33. Company: Social-3

34. Company: Sonamine

35. Company: Sonamine

36. Government: Homeland Security