nocturnal emission reflex emission of semen during sleep. thermionic emission the application of heat, such as to a filament, resulting in the emission of electrons and ions. thermionic emission
Which means if the equipment if design to has a high factor of safety, the cost to fabricate the equipment will increase and same to the weight too. But if the equipment is design with low cost and low weight, the factor of safety will be low too.
*a factor of 4 is used to estimate the nitrogen losses from non-urine sources (sweat, feces, etc.). If the nitrogen balance is 0, the person is consuming the correct amount of protein for maintenance. If the nitrogen balance is negative, increase the protein intake by a factor determined by multiplying the nitrogen balance figure by 6.25.