On the Virtues of Being Popular
In any network, some nodes are more connected than others, making them ‘hubs’. This is a recurring pattern in the evolution of successful networks, ranging from the world wide web to many natural ecosystems. A ‘hub’ is not just a node with a few more connections than a usual node; a hub has connections to many other nodes – many quite distant – and also connects many disparate nodes (nodes of very different types). If you were to count all the connections each node has, you would get a mathematical distribution called a ‘power-law’ distribution with relatively few hyper-connected nodes – hubs – and a ‘long tail’ of less connected nodes.
Contents contributed and discussions participated by Ferananda Ibarra
Network organisation for the 21st century : turbulence - 4 views
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Unlike networks that have a normal or random distribution of connections, networks that have a power-law distribution of connections are ‘scale-free,’ which means that no matter how many more nodes are added to the network, the dynamics and structure remain the same. This seems to be a sweet spot in the evolution of networks for stability and efficiency. The network can get bigger without drastic changes to its function.
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The Surprising Strength of the Long Tail There is a looming contradiction: how can we have hubs and still have a strong network of dense connections that is not dependent on them? Don’t hubs lead to the emergence of permanent, entrenched leaders, centralisation and other well-documented problems? There is something of a tension here: the point is not simply that we should develop hubs, but that we have to simultaneously ensure that the hubs are never allowed to become static, and that they’re at least partially redundant. Sounds complicated, but healthy and resilient networks aren’t characterised simply by the presence of hubs, but also by the ability of hubs to change over time, and the replacement of previous hubs by apparently quite similar hubs.
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Crowdmap - 1 views
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