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Concept development is a set of activities that are carried out early in the systems engineering life cycle to collect and prioritize operational needs and challenges, develop alternative concepts to meet the needs, and select a preferred one as the basis for subsequent system or capability development and ...
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In history, a historical figure is a person who lived in the past and whose actions had a substantial influence on the lives and awareness of other people. There are certain characteristics that are assigned to these personalities that are a composite of the real ideals they declared as well as the way in which they were regarded by others.
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D. began to farm and live in permanent settlements.
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