Blood counting machines aspirate a very small amount of the specimen through narrow tubing followed by an aperture and a laser flow cell. Laser eye sensors count the number of cells passing through the aperature, and can identify them; this is flow cytometry.
In computing, Extract, Transform and Load (ETL) refers to a process in database usage and especially in data warehousing that performs: Data extraction â extracts data from homogeneous or heterogeneous data sources.
It contains binary log data at the trace level, such as disk accesses or page faults, and is used to log high-frequency events while tracking the performance of an operating system. Reports may be generated from ETL files using the command-line utility Tracerpt.