A method and an apparatus for affecting dispatch andor disposition of a workpiece. The logic that manages transition of states in the spanning tree protocol entity identifies ports which are changing to a designated port role, and issues a message on such ports informing the downstream port that the issuing port is able to assume a forwarding state. The invention also relates to methods of making an Alzheimer’s Disease or dementia associated with cerebral amyloidosis animal model or test animal, the animal model produced therefrom, and to a method of using the animal model to screen for effective therapies. With the appropriate selection of particle chemistry, virtually any separation or purification operation can be conducted in multiplicity, including selective bindelute chromatography operations, on sample mass loads less than 1 microgram in volumes of a few microliters, as well as larger mass loads and volumes. The control data generating unit generates the control parameters based on the image forming data information for a period in which the image data to be used for adjusting image quality is output.