An automatic digital image characterization system has a feature extractor, including a segment processor and a feature processor. To begin with, a first silicon conductive layer is formed by doping an impurity of a high concentration into a first single crystal silicon layer. The invention further provides an assay for the identification of such PDI inhibitors based on the discovery that inhibitors of the invention also induce shedding of the leucocyte L-selectin adhesion molecule. The hand-held shower hot and cold feed pipes are each hydraulically connected to a first respective hot and cold water inlet of a compact pressure-balancing valve. The adhesives are particularly useful for bonding nonpolar substrates such as poly–olefins. The touch screen display displays a first home screen on which an icon and a first symbol corresponding to a second home screen are arranged.