The mechanism that produces the Cheyne-Stokes ventilation pattern is still argued, but it may entail unstable feedback regulation of breathing.
Since trade and commerce typically involve items significantly more massive than one gram, and since a mass standard made of water would be inconvenient and unstable, the regulation of commerce necessitated the manufacture of a practical realization of the water-based definition of mass.
Both ADHD and mania are characterized by an unstable wakefulness regulation assessed by EEG measures of vigilance, ratings of sleepiness and deficits in sustained attention tasks.
It has been postulated that in both mania and ADHD, this unstable wakefulness regulation represents a central pathogenetic factor leading to attention deficits and inducing hyperactive, impulsive and sensation-seeking behaviour as an autoregulatory attempt to stabilize wakefulness by increasing external stimulation [ 56].
Unstable gene regulations will lead to the malfunction or even the death of the cells.
The major functional categories of genes with unstable mRNA were 'Regulation of transcription', 'Cell cycle'Apoptosis'iSignalignal transduction' and 'Development', whereas the major functional categories of genes with stable mRNA were 'Metabolism', 'Protein biosynthesis', 'Extracellular matrix' and 'Cytoskeleton' (Fig. 1G).
Although mRNAs encoding factors linked with transcription regulation are unstable in all cell types examined to date (Figure S2B) [42], [43], [43], cell cycle associated mRNAs are unstable in C2C12 and HepG2 [42], but not in ES cells [10], human B cells [43] or NIH3T3 fibroblasts [43].
Especially striking is the fact that only two studies are directed at the hypotheses advanced in many broad descriptive articles concerning the environmental conditions (e.g., regulation, taxes, unstable macroeconomic conditions, and ripe technologies) spurring financial innovation.
In this paper, we are concerned with the output regulation of an unstable reaction-diffusion PDE with regulator delay and unmatched disturbances, which are generated by an exosystem.
Friedman was a fierce promoter of economic freedom who challenged the postwar consensus that markets are inherently unstable and need control and regulation by government.
