Diversity optimizes niche partitioning.
The company said it would sell off its Hummer and Saab brands, shrink its Pontiac brand into a niche vehicle division, and explore opportunities to sell, close or consolidate the Saturn brand that — when it was started in the 1980s — was supposed to be G.M.'s answer to the smaller, fuel-efficient cars sold by Japanese competitors.
Alternatively, a stem cell may divide asymmetrically yielding one stem cell and one non-stem cell that is destined to exit from the stem cell niche (asymmetric division model).
The other program focuses on the behavior of spermatogonial stem cells in the niche, including division, differentiation, and movement (de Rooij and van Beek, 2013).
Growth of larval testes relies on asymmetric, niche-supported divisions of GSCs, whereas growth of larval ovaries relies on symmetric divisions of primordial germ cells (PGCs) (Dansereau and Lasko, 2008).
The main steps of the proposed genetic algorithm are individual coding, and then for each generation, child population division, niche crowding operation, and by evaluating the fitness function the GA can exclude individuals that do not accord with constraint conditions, and then apply selection, crossover, and mutation operations to ameliorate quality of solution.
The "old" Hollywood, the "real" Hollywood (the patriarchal, closeted, World War II anti-Communist/Communist Hollywood), has splintered into the "new" Hollywoods -- two ostensibly (and often legitimately) warring extremes: conglomerates, theme parks, sequels, prequels and franchises vs. indies, pseudo-indies, specialty shops, niche markets and classics divisions.
For both NR and oxidative stress, the protection of neuroblast divisions involves niche glia.
Long before brand management became a 90's catch phrase, Pontiac carved out a niche as General Motors' excitement division.
The stem cell niche governs asymmetric cell division of two daughter cells that may either self-renew to replenish the stem cell pool or to differentiate to more committed cells.
