A soil aeration apparatus may include aeration tines that are actuated by a relatively compact gear system that reduces the size and weight of the apparatus. The defibrillator being powered by at least one thermally powered battery contained within the wireless communications device. The WizardWizard guides the developer through a predetermined series of steps that are required to define a the basic components of a new wizard. In one aspect, the connectors include alignment surfaces cooperating such that when the first and second connectors are being brought together during column assembly, the alignment surfaces guide the column segments in two dimensions within a plane transverse to the axis of the through-holes into a relative position such that the through-holes through the extensions in the connectors are aligned. Contact structures are formed in the openings to make electrical contact with the contacts pads such that the patterned dielectric layer and the permanent antireflective coating each have a conductively filled region forming the contact structures. Once a display output region is identified for updating, the buffered window system is interrogated to determine which regions within each window, if any, may effect the identified output region.