Node connection strength in Physics Tree.
Each node in Physics Tree can be characterized by its mean distance from every other
node. Below is a histogram of mean distances for every node in the tree.
The final bin includes nodes that are not connected to the main tree.
Note also that only individuals whose primary affiliation is this tree are included. Nodes cross-listed
from other academic trees are included on their primary tree.
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Mean inter-node distance | |||||||||||||
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| 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20+ | |
| Mean distance | |||||||||||||
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Number of nodes | |||||||||||||
20 most tightly coupled nodes.
Below are the Physics Tree nodes with shortest mean distance.
| Rank | Mean dist | Name | Institution | Area | Date | |
| 1 | 7.81 | Niels Bohr (Info) | University of Copenhagen | Theoretical nuclear physics | 2005-11-09 | |
| 2 | 8.06 | Wilhelm Lenz (Info) | Universität Hamburg | Theoretical Chemistry | 2013-05-21 | |
| 3 | 8.19 | Max Born (Info) | University of Edinburgh | quantum mechanics, solid-state physics, optics | 2005-11-09 | |
| 4 | 8.26 | Arnold Johannes Wilhelm Sommerfeld (Info) | Ludwig-Maximilians-Universität München | Particle Theory | 2006-04-05 | |
| 5 | 8.29 | John Archibald Wheeler (Info) | University of Texas at Austin | Gravitational Physics/Theoretical Astrophysics | 2009-08-20 | |
| 6 | 8.3 | Isidor Isaac Rabi (Info) | Columbia University | magnetic resonance | 2009-07-08 | |
| 7 | 8.37 | Werner Heisenberg (Info) | Max-Planck-Institut für Physik in München | physics (quantum mechanics) | 2005-11-09 | |
| 8 | 8.39 | Wolfgang Ernst Pauli (Info) | Princeton University | Quantum mechanics | 2010-10-24 | |
| 9 | 8.42 | J. Robert Oppenheimer (Info) | University of California, Berkeley | nuclear physics | 2011-07-29 | |
| 10 | 8.42 | Enrico Fermi (Info) | University of Chicago | Particle Theory | 2010-07-28 | |
| 11 | 8.51 | Ernest Rutherford (Info) | University of Cambridge | Atomic Structure | 2008-03-27 | |
| 12 | 8.51 | Joseph John Thomson (Info) | University of Cambridge | Atomic Structure | 2008-03-27 | |
| 13 | 8.63 | Paul Ehrenfest (Info) | Leiden University | statistical mechanics | 2009-05-17 | |
| 14 | 8.81 | Gregory Breit (Info) | Yale University | physics | 2009-06-03 | |
| 15 | 8.85 | George Gamow (Info) | University of Colorado, Boulder | nuclear theory, stellar theory, relativistic cosmogony, protein coding | 2015-10-24 | |
| 16 | 8.86 | Eugene Feenberg (Info) | Washington University, Saint Louis | Quantum mechanics, Nuclear physics | 2010-07-23 | |
| 17 | 8.86 | Subramanyan Chandrasekhar (Info) | University of Chicago | astrophysics | 2014-05-27 | |
| 18 | 8.89 | Hendrik Antonie Kramers (Info) | Leiden University | quantum mechanics | 2009-05-17 | |
| 19 | 8.9 | Oskar Benjamin Klein (Info) | Stockholm University College | 2011-04-15 | ||
| 20 | 8.9 | Friedrich Hermann Hund (Info) | Georg-August-Universität Göttingen | Theoretical physics | 2012-01-20 |
Distribution of individual connectivity.
Another way to look at the Physics Tree graph is to plot a histogram of
researchers (nodes) based according to the number of immediate connections
(edges) they have to other researchers. The final bin includes nodes with
16 or more connections. The actual distribution has a very long tail, with a maximum of 99 connections. Thanks to Adam Snyder for suggesting this analysis!
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Edge vs node distribution | ||||||||||||||||
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| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16+ | |
| Number of connections | ||||||||||||||||
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Node count | ||||||||||||||||