“The only thing constant is change.” The ancient Greek philosopher Heraclitus spoke these wise words long ago, but little did he know how true they would ring today. Change—disruptive change, to be ...

I introduce the notion of a 'control variable' which gives us a way of seeing how mental causation could be an unproblematic case of causation in general, rather than being some sui generis form of ...

At the heart of most boiler combustion control systems (and most coordinated boiler/turbine control systems as well) is throttle pressure correction, usually applied by the "master controller." ...

operand something to be operated on. An operand can be a variable, a SAS function, or a constant. See Specifying an Operand. operator a symbol that requests a comparison, logical operation, or ...

The key variables involved in controlling biological waste treatment processes-substrate variables, physical and chemical variables, suspended solids variables, and biological activity variables-are ...