Quantification in general is covered in the article on quantification (logic). Assay, for the quantification of neural stem cells. There are several variations of protein-based virus quantification assays. Flow measurement is the quantification of bulk fluid movement. There are two methods for simultaneous detection and quantification. Several methodologies for inverse uncertainty quantification exist under the Bayesian framework. Risk assessment and quantification processes are not integrated. An approach to inverse uncertainty quantification is the modular Bayesian approach. A major criticism concerns the imprecise nature of GHG sequestration quantification methodologies for forestry projects. Labeling is done for visualization and quantification purposes. Diagnosis of aortic stenosis is contingent upon quantification of this gradient. Labeling with stable isotopes is also used for protein quantification. There are several methods conventionally used for quantification of the feeding response. Physics relies heavily on mathematics as the logical framework for formulation and quantification of principles. This was followed by mapping the chromosome using the quantification of fragments.