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  2. Sphere of influence - Wikipedia

    en.wikipedia.org/wiki/Sphere_of_influence

    In most cases, a company described as "bigger" has a larger sphere of influence. For example, the software company Microsoft has a large sphere of influence in the market of operating systems; any entity wishing to sell a software product may weigh up compatibility with Microsoft's products as part of a marketing plan.

  3. Anglosphere - Wikipedia

    en.wikipedia.org/wiki/Anglosphere

    The Anglosphere is the Anglo-American sphere of influence. [ a ] The term was first coined by the science fiction writer Neal Stephenson in his book The Diamond Age , published in 1995. John Lloyd adopted the term in 2000 and defined it as including English-speaking countries like the United Kingdom, the United States, Canada, Australia, New ...

  4. Sinosphere - Wikipedia

    en.wikipedia.org/wiki/Sinosphere

    The term Sinosphere is derived from Sino-'China' (cf. Sinophone) + -sphere, in the sense of the sphere of influence under the influence of a country. [26] The CJK languages—Chinese, Japanese, Korean—each use cognate terms to translate English sphere: Chinese quān (圈; 'circle', 'ring', 'pen')

  5. Near abroad - Wikipedia

    en.wikipedia.org/wiki/Near_abroad

    One of the indicators of the decreasing influence of Russia in its "near abroad" is the diminishing status of the Russian language (which had, among the languages of the Soviet Union, a preferred status of the "language of interethnic communication" [7] [8]): in many countries there is a sharp decrease in the knowledge of Russian among the ...

  6. Hill sphere - Wikipedia

    en.wikipedia.org/wiki/Hill_sphere

    The Hill sphere is a common model for the calculation of a gravitational sphere of influence. It is the most commonly used model to calculate the spatial extent of gravitational influence of an astronomical body (m) in which it dominates over the gravitational influence of other bodies, particularly a primary (M). [1]

  7. Gravity model of migration - Wikipedia

    en.wikipedia.org/wiki/Gravity_model_of_migration

    The gravity model can also be used to determine the sphere of influence of each central place by estimating where the breaking point between the two settlements will be. An example of this is the point at which customers find it preferable, because of distance, time and expense considerations, to travel to one center rather than the other.

  8. Sphere of influence (astrodynamics) - Wikipedia

    en.wikipedia.org/wiki/Sphere_of_influence_(astro...

    A sphere of influence (SOI) in astrodynamics and astronomy is the oblate spheroid-shaped region where a particular celestial body exerts the main gravitational influence on an orbiting object. This is usually used to describe the areas in the Solar System where planets dominate the orbits of surrounding objects such as moons , despite the ...

  9. Settlement hierarchy - Wikipedia

    en.wikipedia.org/wiki/Settlement_hierarchy

    Using the title of a settlement can be misleading in the absence of any widely accepted definition. For example, city status in the United Kingdom historically arose from its place in the ecclesiastic hierarchy. (In modern times, city status is awarded for secular reasons but without reference to size.)