(plural ring topologies) (computing) A network topology in which, in the physical case, every node of a network is connected to exactly two other nodes: one node designated as upstream and the other as downstream. A given node receives data from its upstream node and sends data to its downstream node.
Image copyright. The price of Brent crude oil has fallen below $50 a barrel for the first time since May 2009. It fell more than a dollar to $49.92 a barrel in early trading on Wednesday before edging back above the $50 mark. Slowing global growth and increased supply of oil and gas have pushed prices sharply lower in recent weeks.
all this is dire news for companies in the exploration and production or upstream part of the industry many of whose strategies have been built around far higher oil prices after plunging below $ 35 during the 2008 09 recession the price of brent had recovered to $ 128 a barrel by spring 2012ll this is dire news for companies in the exploration and production or upstream part of the industry many of whose strategies have been built around far higher oil prices after plunging below $ 35 during the 2008 09 recession the price of brent had recovered to $ 128 a barrel by spring 2012