1736 -Louis Euler: Mathematician

Q. Can someone cross every bridge and return to the same spot?

A. No, odd number of bridges.

Mathematics:

Graph Theory

Node

Edge

7 Bridges of Königsberg

Social psychology(focus: small groups)

Psychology(focus: the individual)

Sociology(focus: society)

1800’s: Sociology and Psychology

Auguste Comte: unit of analysis = FAMILY

Georg Simmel: society is interaction among individuals

Membership in groups imposes obligations, provides benefits

1930’s: Jacob Moreno - PsychologistInterpersonal Relations

http://www.asgpp.org/docs/WSS/WSS.html

Journal: Sociemetry

1930’s: Jacob Moreno - Psychologist

Growth of Network Studies

Sociology: Smoking

Sociology: Obesity

Academia: CEOs & Boards

1994: 6 Degrees of Kevin Bacon

6 Degrees of Kevin Bacon

Created by three college students at Albright College in Pennsylvaniawhile they were watching Footloose.

LinkedIN: InMaps

LinkedIN: InMaps

http://inmaps.linkedinlabs.com/

Facebook

Twitter: Social Network Analysis

Twitter: Pew Research

Twitter: Pew Research

Undirected Directed

( , ) ( , )i j j iv v v v ( , ) ( , )i j j iv v v v

Undirected - Directed

Org Hierarchy

Business Applications

Organizational Design

Organizational Design

Wearable Sensors

Companies: Activate Networks

Companies: Activate Networks

Companies: Employee Capital

Companies: maven7

Companies: maven7

Companies: maven7

Companies: KXEN

Companies: KXEN

Company: Red Owl Analytics

Company: Social-3

Company: Social-3

Company: Sonamine

Company: Sonamine

Government: Homeland Security