This invention relates to a process for reducing the level of pollutants in the exhaust of a diesel engine, comprising: operating said diesel engine using as the fuel a water-diesel fuel emulsion; and contacting the exhaust gas from said diesel engine with an oxidation catalyst. The crosslinking system is a water-soluble salt complex including a primary crosslinking agent, a secondary crosslinking agent, and a tertiary crosslinking agent. The site-builder receives instructions input from a first user and creates a dedicated network site based on the received instructions. Either a data signal or a test signal are multiplexed to the input of the driving circuit to produce respectively the domino logic output signal or a test output signal. Each of the arms includes a first portion disposed proximate the first arc plates and a second smaller portion disposed proximate the second arc plates. The wafer is then cooled from the temperature of said heat treatment at a rate which allows some, but not all, of the crystal lattice vacancies to diffuse to the front surface to produce a wafer having a vacancy concentration profile determined in part by the gas to which each surface is exposed, in part by the surface oxidation and in part by the cooling rate.