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Coalescent theory is a model of how alleles sampled from a population may have originated from a common ancestor.In the simplest case, coalescent theory assumes no recombination, no natural selection, and no gene flow or population structure, meaning that each variant is equally likely to have been passed from one generation to the next.
Representation of the coalescence of two droplets, bubbles, or particles to form a single entity. Coalescence is the process by which two or more droplets, bubbles, or particles merge during contact to form a single daughter droplet, bubble, or particle.
In computer science, coalescing is a part of memory management in which two adjacent free blocks of computer memory are merged.. When a program no longer requires certain blocks of memory, these blocks of memory can be freed.
In chemistry, coalescence is a process in which two phase domains of the same composition come together and form a larger phase domain. In other words, the process by which two or more separate masses of miscible substances seem to "pull" each other together should they make the slightest contact.
As the water droplet is very conductive, the induced charges will reside on the surface. The droplet has no net charge but one positive and one negative side. Inside the droplet, the electric field is zero. When two droplets with induced dipoles get close to each other, they will experience a force pulling the droplets closer until they coalesce.
COALESCE, an SQL function that selects the first non-null from a range of values; Null coalescing operator, a binary operator that is part of the syntax for a basic conditional expression in several programming languages; Coalesced hashing, a strategy of hash collision resolution in computing
In colloquial Norwegian, the sequence /rt/ may even coalesce over non-alveolar phonemes, changing their place of articulation to retroflex, even if /r/ normally wouldn't trigger it. Examples include sterkt /stæɾkt/ [stæʈː] , skarpt /skɑɾpt/ [skɑʈː] , verktøy /ʋæɾk.tœʏ̯/ [ʋæʈ.ʈœʏ̯] and varmt /ʋɑɾmt/ [ʋɑɳʈ] .
Since, within the Roche limit, tidal forces overwhelm the gravitational forces that might otherwise hold the satellite together, no satellite can gravitationally coalesce out of smaller particles within that limit. Indeed, almost all known planetary rings are located within their Roche limit. (Notable exceptions are Saturn's E-Ring and Phoebe ring.