Their problem was that both the membrane current l M and the membrane potential V M are also changing constantly during the action potential. Now if one of these variables could be held constant during the action potential (i.e., V M), measurement of l M would enable them to calculate g M at any instant.
The CMMi Easy button notes on Product Integration (PI) Process Area Product Integration (PI) is one of the core Engineering Process Areas within CMMi, this process is concerned with assembly of product components to build the finished software product.
Vertical integration is the merging together of two businesses that are at different stages of productionâfor example, a food manufacturer and a chain of supermarkets. Merging in this way with something further on in the production process (and thus closer to the final consumer) is known as forward integration.