The heart rate zone formula is flawed, especially for women. Here's how to rethink your training.

The heart rate zone formula is flawed, especially for women. Here's how to rethink your training. These days, everyone from ...
Oil

Practical equations calculate gas flow rates through venturi valves

Oil field operators can use several practical equations for calculating flow rates of natural gas through venturi gas-lift valves. For critical flow, this analysis derived such equations from a ...