Optimization-oriented reduced-order models should target a particular output functional, span an applicable range of dynamic and parametric inputs, and respect the underlying governing equations of the system.
Considering that metabolism is altered in food-deprived males (Tan et al., 2011), we tested whether perturbing the histone deacetylase metabolic regulator, sir-2.1, affects the functional span of copulation behavior in fed and transiently starved/re-fed males.
The feathers of birds have a functional life span that is always much shorter than the potential life span of adult birds.
The functional life span of feathers is always much less than the potential life span of birds, so feathers must be renewed regularly.
Before the wide-spread use of these SMAs is realized, a detailed understanding on the long-term stability and functional life span of these material must be achieved.
While the physical configuration of the city is set by various interrelated but also distinct scales – the plot, the quarter, the city, the region, potentially even the polycentric mega-city region (Thierstein et al. [2012]:47) the functional flows span across multiple scales and across different points in time.
Therefore, the advantages C. elegans males would have by exhibiting an extended satiation time after multiple intromissions are uncertain, since their functional reproductive span is very short.
Time of insemination and proper sperm transport to the site of fertilisation, within the functional life span of the oocyte, are major prerequisites [ 24].
Interestingly, several of the regions identified with the meta-analysis of functional integration span different territories featuring different cytoarchitecture, according to the available maps, and, according to our results, progressively different connectional fingerprints.
We added the following paragraph to the Discussion (paragraph starting "Much remains to be discovered concerning the molecular and structural pathways involved in post ejaculatory behavioral activity (Levin, 2009, Turley and Rowland, 2013)… since their functional reproductive span is very short").
