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Geographic mobility, population mobility, or more simply mobility is also a statistic that measures migration within a population. Commonly used in demography and human geography, it may also be used to describe the movement of animals between populations. These moves can be as large scale as international migrations or as small as regional ...
Human migration is the movement of people from one place to another, [1] with intentions of settling, permanently or temporarily, at a new location (geographic region). The movement often occurs over long distances and from one country to another (external migration), but internal migration (within a single country) is the dominant form of human migration globally.
Between the Crimean War of 1853–56 and World War I, at least 2.5 million Muslims arrived in the Ottoman Empire as refugees, primarily from Russia and the Balkans. [14] The Balkan Wars of 1912–1913 caused 800,000 people to leave their homes. [15] Various groups of people were officially designated refugees beginning in World War I.
Studies show that the pre-modern migration of human populations begins with the movement of Homo erectus out of Africa across Eurasia about 1.75 million years ago. Homo sapiens appeared to have occupied all of Africa about 150,000 years ago; some members of this species moved out of Africa 70,000 years ago (or, according to more recent studies, as early as 125,000 years ago into Asia, [1] [2 ...
Migration and Global Environmental Change [1] was a report about the influence of climate change on patterns of human migration and displacement published in 2011. The report was produced by the Foresight unit at the UK's Government Office of Science. It became known colloquially as 'The Foresight Report' among people working in the field of ...
Displacement (geometry), is the difference between the final and initial position of a point trajectory (for instance, the center of mass of a moving object).The actual path covered to reach the final position is irrelevant.
This type of migration makes the assumption of only mild lateral velocity variations and this breaks down in the presence of most interesting and complex subsurface structures, particularly salt. [6] Some popularly used time migration algorithms are: Stolt migration, [7] Gazdag [8] and Finite-difference migration. [9]
Population exchange is the transfer of two populations in opposite directions at about the same time. In theory at least, the exchange is non-forcible, but the reality of the effects of these exchanges has always been unequal, and at least one half of the so-called "exchange" has usually been forced by the stronger or richer participant.