You may not think of salt and sugar as solids because when you see them in the kitchen they are such small particles. But each of these particles is as much a solid as a wooden table, a glass window, or a gold piece of jewelry. A solid is a collection of atoms or molecules that are held together so that, under constant conditions, they maintain a defined shape and size.
Pulse Width Modulation, or PWM, is a technique for getting analog results with digital means. Digital control is used to create a square wave, a signal switched between on and off.
Defining Personal Risk Management. Personal risk management (PRM), as I will use that phrase in this series, is the process of applying risk management principles to the needs of individual consumers. PRM is the process of identifying, measuring, and treating personal risk (including, but not limited to, insurance), followed by implementing the treatment plan and monitoring changes over time.