Abstract: An interconnection scheme among the processing elements ("PEs") of a multiprocessor computing architecture realizes, through PE reconfiguration, both fault tolerance and a wide variety of different processing topologies including binary trees and linear systolic arrays. By using a novel variant on a tree expansion scheme, the invention also allows for arbitrary up-sizing of the PE count to build virtually any size of tree network, with each size exhibiting same high degree of fault tolerance and reconfigurability. The invention may be practiced with 4-port PEs arrayed in a module comprising a 4.times.4 board-mounted PE lattice. Each PE has four physical ports, which connect to the similar ports of its lattice neighbors. Each PE has an internal capability to be configured to route signals to or from any of its neighbors.

Abstract: A process for producing an overbased oil soluble calcium sulfonate having a TBN of 325, said process comprising:(a) diluting a neutral calcium sulfonate with a hydrocarbon solvent and a lower alkanol;(b) adding to the diluted calcium sulfonate solution, CaO, Ca(OH).sub.2 and H.sub.2 O in molar ratios of CaO:Ca(OH).sub.2 of about 90:10 to about 20:80 and of H.sub.2 O:CaO of about 0.15:1 to about 0.30:1;(c) heating the sulfonate mixture to a temperature ranging from about 100.degree. F. to about 170.degree. F. under a pressure ranging from about 0 to about 50 psig;(d) passing CO.sub.2 into the heated sulfonate mixture for a period of about 50 to about 200 minutes;(e) adding a diluent oil to the CO.sub.2 treated sulfonate mixture;(f) separating the solids from the liquid of the sulfonate mixture; and(g) stripping the hydrocarbon solvent from the resulting over-based oil soluble sulfonate product having TBN of 325.