Physiological condition monitors utilizing very low frequency acoustic signals and signals indicative of body orientation are disclosed. The implantable medical electrode has a surface geometry which optimizes the electrical performance of the electrode, while mitigating the undesirable effects associated with prior art porous surfaces. The front section has a first indicia section identifying a predominant color of the first article of clothing which is received in the slot and a second indicia section that identifies colors for the second article of clothing that are complementary to the color of the first article of clothing and produce a color coordinated outfit. A hard mask layer is formed on the first polysilicon layer. In further aspects, this invention provides an airconditioning system which includes a plurality of absorption chiller-cells that produce various kinds of capacity of the system by combining more or less numbers of chiller-cells, the invention provides also an easier and simpler solution for maintenance or replacement of chiller-cells.