You have an analog source that produces a pure tone. You can switch the source on or off by the input event on or off. Using Stateflow (or similar), construct a timed automaton that provides the on and off signals as outputs, to be connected to the inputs of the tone generator.

What need most led to the creation of the advanced research projects agency network? darpa wanted scientists to be able to collaborate and share research easily. darpa wanted american and russian politicians to be able to communicate. darpa wanted astronauts to be able to contact nasa and the white house. darpa wanted factory owners to be able to coordinate supply chains.

Why are weather forecasts more reliable now compared of hundred years ago

In the context of intentional computer and network threats a is a programming routine built into a system by its designer