Согласованные узлы

Согласованные узлы (MN) представляют собой устройства, которые объединяют SONET- или SDH-кольца. Они обеспечивают избыточный маршрут между кольцами и перемаршрутизируют трафик при выходе кольца из строя. Согласованными узлами также могут быть ADM-мультиплексоры, которые функционируют в качестве избыточных устройств между кольцами, однако конструкции такого типа дорогостоящи. На рис. 14.6 представлены два оптических кольца, объединенные посредством пары согласованных узлов, как с повторителями, так и без них.

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Mohair Yarn Production The

Mohair Yarn Production
The most valuable characteristic of the Angora as compared to other goats is the value of the mohair that is clipped. The average goat in the U.S. shears approximately 5.3 pounds of mohair per shearing and are usually sheared twice a year. They produce a fiber with a staple length of between 12 and 15cm.
The mohair is very similar to wool in chemical composition but differs from wool in that it is has a much smoother surface and very thin, smooth scale. Consequently, mohair lacks the felting properties of wool. Mohair is very similar to coarse wool in the size of fiber. It is a strong fiber that is elastic, has considerable luster, and takes dye very well. Mohair has been considered very valuable as an upholstering material for the making of plushes and other covering materials where strength, beauty, and durability are desired.
The market valuation of mohair fluctuates more than does that of wool, but, in general, satisfactory prices are obtained for the clip. During depressed times, the market has favored fine hair and because fine hair is normally shorn from young goats, selection for fertility has also become increasingly important.