Systems and methods are disclosed that facilitate the evaluation of hosted computing devices in accordance with target patterns. The organic copper diffusion barrier layer can be applied to a dual damascene structure, which is formed between a copper wiring layer and an organic dielectric layer, to defend copper diffusion from the copper wiring layer into the organic dielectric layer. The parameters of the cutting edge are chosen by a process that calculates the parameters of the gear that is to be cut with the cutter. The aircraft is supported by one or more masts as the lift gas is injected to achieve the required buoyancy for launch. The substantially pure ionic liquid precursors were used to prepare substantially pure ionic liquids. Described herein are methods and pharmaceutical compositions for improving overall gastrointestinal health or for decreasing symptoms of lactose intolerance by administering to subject in need thereof a pharmaceutical composition comprising a prebiotic, optionally in combination with effective amount of a probiotic microbe or microbes.