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node
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node

In physics, a position in a standing wave pattern at which there is no vibration. Points at which there is maximum vibration are called antinodes. Stretched strings, for example, can show nodes when they vibrate. Guitarists can produce special effects (harmonics) by touching a sounding string lightly to produce a node.

node

Point where routes meet. It may therefore be the same as a route centre. In a topological network, a node may be the start or crossing point of routes, also called a vertex.

node

In oceanography, the point on a stationary wave (an oscillating wave with no progressive motion) at which vertical motion is least and horizontal motion is greatest. In earth science, it is the point on a fault where the apparent motion has changed direction.

node

In computing, any device connected to a network, such as a router, a bridge, a hub, and a server.

node

In music, the point in a vibrating string at which the vibration becomes cut into segments.



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Mentioned in?  References in periodicals archive?   Hutchinson browser?   Full browser?
 
The research team point out that the way electrical signals are generated in the SA node - and hence the heart rate - are far from simple.
These cells are called the sinoatrial or SA node, the sinus node or the heart''s "pacemaker.
Once generated by the SA node, the impulses spread in a coordinated fashion across the heart muscle in less than a quarter of a second.
 
 
 
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