Networks

some case studies

Karate club

Zachary's karate club

  • A social network of a karate club studied by Wayne W. Zachary from 1970 to 1972
  • Links capture interactions between the club members outside the club
  • During the study a conflict arose between the administrator "John A" and instructor "Mr. Hi" (pseudonyms), which led to the split of the club into two.

Zachary's karate club

  • Half of the members formed a new club around Mr. Hi
  • members from the other part found a new instructor or gave up karate.
  • Basing on collected data Zachary assigned correctly all but one member of the club to the groups they actually joined after the split
  • Link to the paper (1977)

The process leading to fission is viewed as an unequal flow of sentiments and information across the ties in a social network. This flow is unequal because it is uniquely constrained by the contextual range and sensitivity of each relationship in the network. The subsequent differential sharing of sentiments leads to the formation of subgroups with more internal stability than the group as a whole, and results in fission

Wayne W. Zachary (1977) An Information Flow Model for Conflict and Fission in Small Groups. University of New Mexico.

Zachary's matrix

Zachary's network viz

Zachary's calculations

Karate club

My try in Gephi

Now you try it

link

Add node affiliation

link

  • Import spreadsheet
  • Nodes table (NOT edges!)

Hits & misses

How do we assess our clustering now?

using nothing but Excel

Aftermath: Zachary Karate Club Club

Zachary Karate Club Club is a honorific group that awards membership in the group, along with a traveling trophy, to a scientist who is the first to use Zachary's Karate Club as an example at a conference on networks.

(Wikipedia)

War and peace

Two types of networks

  • Co-occurrence (same sentence)
  • 'Syntactic siblings' ([Pierre] addressed [Natasha])

1 volume 1 part

>

synactic siblings

1 volume 2 part

>

synactic siblings

Feel free to play around!

Russian drama

In CSV

github.com/DanilSko/YasnayaPolyana/tree/master/CSV

Or encode your own and use easyvis!

# Действие 1
## Явление 2
Липочка
Аграфена Кондратьевна
## Явление 3
Липочка
Аграфена Кондратьевна
Фоминишна
## Явление 4
Липочка
Аграфена Кондратьевна
Фоминишна
Устинья Наумовна
## Явление 5
Липочка
Аграфена Кондратьевна
Устинья Наумовна

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