The innovation enables generation of an index of cloud-based resources. In one illustrative embodiment, the force sensor may include a sensing die mounted to a substrate and an actuation assembly for transmitting an external force to the sensing die. Described is a medical device including a syringe barrel, plunger rod and stopper assembly having an air permeable and liquid impermeable porous portion and structure for forming a vacuum within chamber between the stopper and plunger rod wherein the plunger rod includes a sealing edge and is moveable relative to the stopper. Further still, the micro-fluidic device includes the first pressure site and the second pressure site that can be spaced apart by a first section of the fluid channel. The inner wall of the first connection tube may thus be cleaned readily with a sponge or the like.