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.
A diagram illustrating horizontal integration and contrasting it with vertical integration. Horizontal integration is the process of a company increasing production of goods or services at the same part of the supply chain. A company may do this via internal expansion, acquisition or merger. The process can lead to monopoly if a company captures the vast majority of the market for that product or service. Horizontal integration is orthogonal to vertical integration, where companies integrate multiple stages of production of a small number of production units.