| http://www.w3.org/ns/prov#value | - Some of these problems are due to the nature of the physical environment (e.g., metal walls, floors, and ceilings.) Others are due to nature of the electromagnetic environment (e.g., generators, motors, radars, and other wireless communication equipment.) Yet others are due to the nature of combat (e.g., deliberate hostile jamming, friendly jamming of the enemy's communications, destruction of tra
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