What Types of Radiation Are There? The radiation one typically encounters is one of four types: alpha radiation, beta radiation, gamma radiation, and x radiation. Neutron radiation is also encountered in nuclear power plants and high-altitude flight and emitted from some industrial radioactive sources. Alpha Radiation.
Fatigue: A condition characterized by a lessened capacity for work and reduced efficiency of accomplishment, usually accompanied by a feeling of weariness and tiredness. Fatigue can be acute and come on suddenly or chronic and persist.
FATIGUE. 1  Prevention of fatigue as a safety risk in commercial aviation operations has focused on effective management of duty and rest scheduling (Dinges et al., 1996). When considered in the context of work safety, fatigue has been broadly defined as a biological drive for recuperative rest (Williamson et al., 2011).