A semiconductor device includes a substrate, a plurality of first columns having a first conductivity type, a plurality of second columns having a second conductivity type, a first electrode, and a second electrode. The multicomponent fibers are substantially biodegradable, yet readily processed into nonwoven structures that exhibit effective fibrous mechanical properties. Each flip-flop has a data input connected to receive a respective unpark signal, a clock signal at respective clock frequencies, and a respective enable signal. In the first mode, the boot mode switching unit controls the host apparatus to boot into a first operation environment. Compounds of Formula Ia are useful as anti-atherosclerotic, anti-asthmatic, anti-allergic, anti-inflammatory and cytoprotective agents.