Travel-associated infections in migrants are complex for various reasons. Epidemiology can be affected by changing trends in the migrant's country of origin, such as those with HIV originating from sub-Saharan countries. read with interest the Article by Patricia Schlagenhauf and colleagues x1 See all References 1 about travel-associated infection presenting in Europe.
live load. 1  Engineering any load not constant in its application, as the moving traffic carried by a bridge or other structure in addition to its own weight. 2  A moving, variable weight added to the dead load or intrinsic weight of a structure or vehicle.
Dead loads are static forces that are relatively constant for an extended time. They can be in tension or compression. The term can refer to a laboratory test method or to the normal usage of a material or structure. Live loads are usually unstable or moving loads. These dynamic loads may involve considerations such as impact, momentum, vibration, slosh dynamics of fluids, etc. An impact load is one whose time of application on a material is less than one-third of the natural period of vibration of that material. Cyclic loads on a structure can lead to fatigue damage, cumulative damage, or failure. These loads can be repeated loadings on a structure or can be due to vibration.