The ratio of controller to total asthma medications can be calculated using 1 or 2 quarters of data; high versus low ratios differentiate patient characteristics. Objective: To investigate differences ...

Analog Devices, Inc., which recently acquired Linear Technology Corporation, announces the LTC7820, a high power fixed ratio charge pump DC/DC controller that eliminates the power inductor in a ...

The Delta II flow-ratio controller measures, divides, and controls user-specified ratios of mixed gas flows to several zones or chambers. It features a 20:1 dynamic ratio control range and faster ...

High bandwidth control of the air-fuel ratio is necessary in order to minimize the exhaust emissions of sparkignition engines with three-way catalytic converters. A new approach is to implement a ...

Industrial mass flow control is a vital part of combustion and burner control in manufacturing applications. Precise control of the mass flow of the fuel-to-air ratio to the burner maintains constant ...