a These levels are based on Estimated Energy Requirements (EER) from the Institute of Medicine Dietary Reference Intakes macronutrients report, 2002, calculated by gender, age, and activity level for reference-sized individuals.
The definition of a channel is a waterway, a means of communication and a specific television or radio frequency. An example of channel is the English Channel. An example of channel is writing. An example of channel is Fox News.
The channel is a medium through which the transmitter output is sent, which could be a wire, a coaxial cable, an optical fiber, or a radio link, etc. Based on the channel type, modern communication systems are divided into two categories: wireline communication systems and wireless communication systems.