An implantable cardiac stimulation device and method utilizes electrogram spectral analysis to administer electrical stimulation therapy to a heart to treat accelerated arrhythmias of the heart. The compositions include at least one boron-containing material, such as but not limited to boric anhydride, and at least one silane-containing material, such as but not limited to methyltrichlorosilane. The leg is hinged to allow folding thereof to facilitate cleaning under the toilet bowl. The obtained in-cylinder airfuel ratio is used as an input airfuel ratio to identify a parameter in a primary delay element. The foot protector is also preferably of a substantially constant thickness to reduce manufacturing costs.