Two main types of data assimilation ( DA ) are used : three-dimensional ( 3DDA ) which largely ignores the information present in the temporal distribution of the observations; and four-dimensional ( 4DDA ) which attempts to make use of it.
12.
The experimental analysis of the glass shards began by sorting them according to their color and then by the context they were found, in order to determine the spatial and temporal distribution of the glass in the site that could help in fitting the parts back together.
13.
"Argentoconodon "'s spatio-temporal distribution has been noted as being unusual, in that it is not only a rare Early Jurassic eutriconodont, but also one of the only two South American members of this group, the other being the slightly younger " Condorodon "; other mammals in the Ca�adon Asfalto Formation are various australosphenidans and a putative allothere.
14.
Many ecologists argue that bottom-up and top-down control do not play equally critical roles in the structure and dynamics of populations in an ecosystem; however, data suggests that both bottom-up and top-down forces impact the structure of food webs and the spatial and temporal distribution of organisms ( Bertness 2007 ), although to what extent each plays a role is not fully understood.
15.
There has also been recent work showing that the PV penetration limit can be increased by deploying a distributed network of PV + CHP hybrid systems in the U . S . The temporal distribution of solar flux, electrical and heating requirements for representative U . S . single family residences were analyzed and the results clearly show that hybridizing CHP with PV can enable additional PV deployment above what is possible with a conventional centralized electric generation system.
