Publications

The effects of long-term soil burial on reinforced plastic is of major significance because of their present and projected use in intimate soil contact.

Included in the Bell System study of direct soil burial effects on the properties of material for telephone plant were a number of adhesives and pressure-sensitive adhesive tapes.

Casting resins are thermosetting materials (thermosets) which are hardened by crosslinking at ambient or elevated temperatures.

Twenty-three types of unclad laminates based on phenolic, melamine, silicone, epoxy, and polyester resins were examined after exposure in alkaline soil at Roswell, New Mexico, and in acid soil at B

The molded plastics selected for soil burial tests represented a limited cross section of those commercially available at the time the program was started.

A .soil burial study was undertaken on polyethylene and vinyl chloride plastics in order to develop a background of knowledge concerning these materials t h a t would be useful in the design of bur

R u b b e r and other vulcanized polymers play an important role in the construction of a great deal of the hardware and equipment used in the Bell System.

In the late 1950s, the Bell System started to bury exchange area plant directly in the soil and now some SO percent of annual additions to service individual homes are buried.

It is difficult to pick out trends from the d a t a discussed in the preceding papers but there are some trends t h a t m a y aid design engineers in developing longer lasting structures for buried

A birth-death queueing system with single server, first-come first-served discipline, Poisson arrivals and mean service rate which depends linearly on the number of customers in the system, is cons