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.
Warning signs, such as this one, can improve safety awareness. Safety is the state of being safe (from French sauf), the condition of being protected from harm or other non-desirable outcomes. Safety can also refer to the control of recognized hazards in order to achieve an acceptable level of risk.