Dry deposition monitoring networks across areas of large spatial extent remain, up to now, impracticable [1].
Data Mining can be defined as being the use of computational techniques to extract knowledge from a set of data which, generally, is large enough to make human analysis impracticable [9].
In the oldest subjects, the above mentioned techniques are not easily applicable and a 24-hour urine collection for creatinine clearance is often impracticable [ 13].
Where detection of ·OH is impracticable, identifying H2O2 may elucidate a reaction mechanism involving ·OH formation.
The exact method with pixel domain variables starts to be impracticable from (2048^2) pixels slices, as thousands of iterations are required to yield an acceptable image quality, leading to hours of processing per slice.
Limited mouth opening makes dental treatment difficult and sometimes impracticable [ 13].
It has been recognized that conventional project-specific consent for research using DNA databanks would render such research impracticable [ 16].
A further alternative would be universal genetic screening (of pregnant women) or focussed genetic screening of babies prior to treatment, which is at present impracticable [ 15].
International migrants with Chagas disease, amounting to half a million at least, may receive treatment in one country and subsequently move to another, making the currently recommended long-term serological follow-up highly impracticable [ 25].
Specifically, adolescents are legally able to consent for certain types of treatments/interventions and minimal risk research (e.g. survey research) when the requirement for parental consent makes the research impracticable [ 35].
Further, a formulation with penalty variables, for example recognition of interferences via constraints of the type: A ∧ B ⇔ C like in (5b), (5d), is impracticable.
