The inherent stability of the differentiated state is maintained by various processes, including feedback activation of genes by their own products and repression of inactive genes.
Although the US is among the world's leaders in technology and open data, where high quality geospatial datasets are publicly available and inventory programs are maintained by various federal and state agencies, opportunities for improvement remain.
The trail, which spans through eleven U.S. states, is maintained by various federal and state government agencies; it passes through some 100 historic sites, notably archaeological locations including the Knife River Indian Villages National Historic Site.
Peripheral tolerance is maintained by various suppressor cells.
While ecological research has historically focused on biotic diversity as a dependent variable, asking how it is maintained by various ecological processes, the essential question of diversity-function research is how diversity regulates, rather than responds to, these processes [10].
The fluid balance is maintained by various ion channels expressed on both squamous alveolar epithelial cells type I (AEC I) and cuboidal AECs type II.
Quality control was maintained by various procedures including training and calibration of staff, the use of a standard examiner, and ongoing monitoring of interexaminer reliability and consistency with the standard examiner (Drury et al. 1996).
DO levels can also be maintained by designing the location of the various outfalls in the river as also described by Bhargava (1983b) and Bhargava et al. (1995).
A drawback is that it is difficult to determine good decision values for the various features and that the rule database has to be maintained by hand.
