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...energy provide examples of the use of celestial and magnetic cues for navigation by migratory birds...Migration: 1 Introduction to movement and migration - Not all animals migrate in the same way as birds. The mass migrations of locusts do not involve a round trip for any individual, for their life cycle is shorter than the seasonal cycle. The round trip of the monarch...

...energy requirements. RIM equipment costs approximately 30% less than comparable injection moulding equipment, and product energy requirements are low compared with other materials, although RRIM would increase these. Critical process variables are mould and monomer temperatures, injection and clamping pressures, material flow rate and density. Close control of these...

...energy beam of electrons directed at the joint to be welded. Heat transfer is very localised, not by surface conduction, but within the workpiece itself, so no filler is required. Results in a narrow weld zone and HAZ. Process carried out either under vacuum, or non-vacuum...[Images to demonstrate 'Electron beam welding' - see article ] The electron beam is generated in...

...energy needed by the body to function. This is because it never turns off, and it spends almost as much energy when we are sleeping as when we are awake. It does different work though: when we are awake, the brain’s tasks include resolving problems, moving the body and remembering facts. When we are asleep, however, it repairs and cleans itself while also making sure it...

...energy absorption (which is desirable in packaging and mattresses), or strength-to-weight ratio (which is desirable in structures). Historically, the types of cellular structure that were available were limited, due to the capabilities of traditional manufacturing processes. However, the introduction of additive manufacturing (a.k.a. 3D printing) has made it possible to...