"' Guifi . net "'is a free, open and neutral, mostly wireless telecommunications community network, with over 27, 000 active nodes and about 36, 465 km of wireless links.
12.
In particular, to prevent the collision of transmissions in the network, the MAC protocol dictates, based on certain rules, when transmitter-receiver pairs can access the network both in time and space, which also affects the active node positioning model.
13.
An optimal fractional graph coloring in " G " then provides a shortest possible schedule, such that each node is active for ( at least ) 1 time unit in total, and at any point in time the set of active nodes is an independent set.
14.
MJ12 " has " over 1 billion pages indexed, which is much more than just the 1bln urls aforementioned, closer to hundred active nodes crawling 24 / 7, it complies to pretty much every robots . txt standard and " has " done what the GRUB project failed in ( which by the way is still listed in Wikipedia ).
15.
French recommended that this could be done through activation sharpening, a technique which slightly increases the activation of a certain number of the most active nodes in the hidden layer, slightly reduces the activation of all the other units and then changes the input-to-hidden layer weights to reflect these activation changes ( similar to error backpropgation ).
