An implantable pulse generator for prosthetic or therapeutic stimulation of muscles, nerves, or central nervous system tissue, or any combination is sized and configured to be implanted in subcutaneous tissue. At the resource balancer function, receiving an updated remaining capacity value from a first SN of the plurality of SN, storing a remaining capacity value for the first SN from the updated remaining capacity value and calculating the resource attribution proposal between the plurality of SN based on the stored remaining capacity values. The inventive heat insulating material is characterised by a first general formula A1+r03+2, wherein: A=at least one element from the group, B\u2032=at least one element from the group, B\u2033=at least one element from the group and \u22120. The window assembly includes a resilient seal secured to the frame. The method further includes forming an opening sized for receiving a substrate and providing a plurality of support pins extending into the opening for supporting the substrate within the opening. More specifically, the invention provides compositions and methods useful for ameliorating the symptoms of individuals suffering from infection with a broad range of viruses.