We periodically divide the whole swarm S into k clusters using a k-means clustering algorithm to yield the disjoint partition (S = dot {bigcup }_{k}C_{k}).
Branched crypts [presumed fission intermediates) are observed in normal adult human colons at low (<1% of all crypts) frequencies, suggesting some adult crypts periodically divide [ 8]. Adult crypt fates may be described with somatic cell trees that identify common ancestors (progenitors), their descendants (clonal patches), and distances since common ancestors.
Since according to the proposed model the upward migration phenomenon repeats periodically, we can divide the period 1500 2000 indicated in Fig. 5(a) into several subperiods with an interval of TP years and superpose them, as shown in Fig. 5(b).
The rows divide periodically to keep pace with the increasing circumference of the colony.
At this stage of development, the embryo is a syncytium a single cell with multiple nuclei that divide periodically and roughly simultaneously.
In our simulations, viability means that cells divide periodically and that cell mass at division converges to a specific value (±5%).
Professor M Salmon (Birmingham University, UK) outlined recent changes in the model of T cell differentiation in which activation turns naive CD45RA+ T cells into CD45RO+ primed/memory T cells, which divide periodically until they die.
For example, for a cell to be viable, not only must it divide periodically at a characteristic size, but also it should execute cell cycle events (origin relicensing, origin activation, spindle alignment, Esp1 activation and cell division) in the correct order.
With age, however, George I argued with his sons and Olga lamented the quarrels that divided the family periodically.
There are rituals that periodically reenact the original process whereby the cosmos was divided up and established in its present form.
