One of the reasons is the necessary use of experimental characterization and validation of materials and structures respectively.
The necessary use of heavy duty trawl winches can cause plastic deformation of winch barrels, known as "rolling".
Moreover, the necessary use of phenotypes entirely defined by symptoms will very likely increase aetiological heterogeneity, and thus the observed correlations between genotypes and phenotypes.
The trade-offs among conflicting interests in citizen activities and the necessary use of authority in subject activities mandate a clear role for the state.
The world, they say, brims with "hypocrites and scoff-laws", notably the French, who are out to sabotage the necessary use of America's righteous power in Iraq and beyond.
Finally, it discusses some of the issues involved in drawing general conclusions from randomized evaluations, including the necessary use of theory as a guide when designing evaluations and interpreting results.
