A semiconductor device comprising LDD-type sourcedrain regions. The signaling molecule stimulates LuxQ luminescence genes, and is believed also to stimulate a variety of pathogenesis related genes in the bacterial species that produce it. The two or more flexible members can be rotatably attached to the attachment member by rotatable joints such that the flexible members can both rotate and flex relative to the attachment member when the prosthetic foot contacts the ground. By analyzing the received radiation, the spectrometer obtains atmospheric spectroscopy measurements for the atmospheric region through which the incident and reflected radiation pass. Thereby, the mirror is positioned at a proper angle with respect to the light from the lamp A when the lamp A is activated.