Soft errors involve changes to datathe electrons in a storage circuit, for examplebut not changes to the physical circuit itself, the atoms.
2.
VMNET was first used in Europe in December 1989 and opened the door for EARN to share the same physical circuits used by the other organizations connecting to the Internet.
3.
Traditional telephone switches connected physical circuits ( e . g ., wire pairs ) while modern telephone switches use a combination of time slot ( say 1 or 2 ) on a physical wire pair ( A or B ).
4.
Starting in 1911, telephone networks used frequency-division multiplexing to carry several voice channels on a single physical circuit, beginning with the first Type C carrier in that year, which heterodyned three voice channels stacked on top of one voice circuit.
5.
One example might be a telephone in the lobby of a public building, which is programmed to ring only the number of a telephone dispatcher . " Nailing down " a switched connection saves the cost of running a physical circuit between the two points.
6.
What I mean by " strange loop " is here goes a first stab, anyway not a physical circuit but an abstract loop in which, in the series of stages that constitute the cycling-around, there is a shift from one level of abstraction ( or structure ) to another, which feels like an upwards movement in a hierarchy, and yet somehow the successive " upward " shifts turn out to give rise to a closed cycle.
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