Clan boundaries are usually respected; hyenas chasing prey have been observed to stop dead in their tracks once their prey crosses into another clan's range.
They were probably pinned on getting into drop-goal range; another big-screen moment was in the offing.
"To provide a continuous internet service you're talking about a complex choreography where thousands of balloons are steered and programmed in an automated fashion," said Cassidy, adding that the system makes sure another balloon comes into range as soon as another has left.
When one satellite disappears over the horizon, radio equipment on the ground needs swiftly to connect to another one in view without the user noticing (rather as mobile phones do when they move out of the range of one mast and into the range of another).
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If the packet forwarding vehicle does not find any next hop vehicles to forward the packet due to temporary disconnections, it starts carrying the packet towards the next junction until another vehicle comes into its range.
Hybridization as a mechanism of invasion by one species (Q. petraea) into the range occupied by another species (Q. robur) through pollen swamping was proposed to account for the lack of differentiation between these two species [ 15, 16].
The mobile devices in an ad hoc network may move randomly; a transmitting node may move into the sensing range of another transmitter, thus increasing its interference.
When one node moves out of or into the transmission range of another node, the wireless link between the two becomes down or up.
Furthermore, the dynamic topology can also lead to violations of QoS assurance without breaking routes because a transmitting node may move into the sensing range of another transmitter, thereby increasing its interference and reducing its channel access time [8, 9].
