They avoid light and are usually well concealed from casual observation.
But that obvious observation conceals a precise mathematical description: the link between the severity and frequency of conflicts follows a smooth curve, known as a power law.
In practice, this means applying colour and materials to military equipment of all kinds, including vehicles, ships, aircraft, gun positions and battledress, either to conceal it from observation (crypsis), or to make it appear as something else (mimicry).
The direct and reflected waves cannot be distinguished around η = 110° because the observation point is concealed behind the Moon.
That those large stereotypical closed-circuit cameras marked by equally large warning sights watching an intersection are in actuality merely just one element of a series of layered observation devices, including countless concealed and covert monitoring systems.
Otherwise, the long-observation period would have concealed important group differences (Cuijpers et al., 2004; Schemper, 1992).
The cage concealed with transparent mosquito nets for easy observation and also to keep mosquito remain inside the cage.
