An artificial neural network apparatus comprising an array of neural units, each comprising a router, at least one neuron device and at least one synapse unit. Increasing the concentration of specific chain length \u03b1-sulfofatty acid esters, relative to the proportions of the other chain lengths, allows the detergent compositions to exhibit an improved cleaning performance while simultaneously cleaning a wide variety of materials. If the defect state is below a predetermined value, the material is formed on at least one second workpiece using the first process condition. Pressure in the chamber around the container is continuously varied so as to be generally equal to the instantaneous monitored pressure in the compartment of the container. The reel can be further centered by pivoting the pivot frame in a horizontal plane relative to the base frame.