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Typically , the ElimDeadCode component will operate on code fragments that are created by other components participating in the systolic algorithm . Note in the videos that the fragments that have broken off the comet are SLOWING DOWN . Drug companies are scrambling to develop drugs , many of them targeting the beta-amyloid protein fragments that are considered a prime suspect in the nerve cell death that is a feature of the disease , according to the Alzheimer Association in Chicago . Initially , primitive grouping identifies time-frequency fragments which are associated with a single source , but does not decide the identity of the source . The function of the SFI is to receive all event fragments that are needed for a single feature extraction step and merge them into a single fragment that can be input to the FEX algorithm .