"When we first began our research, solar cells were considered impractical and quite expensive," Mr. Mazumder said.
"New and advanced exploration, well drilling and completion technologies are allowing us increasingly better access to domestic gas resources — especially 'unconventional' gas — which, not that long ago, were considered impractical or uneconomical to pursue," said John B. Curtis, a geology professor at the Colorado School of Mines and the report's principal author.
But in World War I, although parachutes were used with great frequency by men who needed to escape from tethered observation balloons, they were considered impractical for airplanes, and only in the last stage of the war were they finally introduced.
While further lowering the column temperature may have improved the atropisomeric separation, temperatures below 6°C were considered impractical and not investigated.
When they first advanced their ideas -- from abolishing slavery, to granting women the right to vote, to ending child labor, to giving workers the right to unionize, to protecting consumers from harmful products, to creating old age insurance and the minimum wage -- they were considered impractical idealists, utopian dreamers, or dangerous radicals.
Most of these variables were not,important and did not improve prediction, or were considered impractical to use.
Such a manipulative experiment would be considered impractical, illegal, and immoral.
Delivery by the Navy was considered impractical, leaving relief flights as the best option.
No doubt our specific ideas would be considered impractical for a Union of 25 member states, all with interests and ideas of their own.
A full election with a vote for all adults is considered impractical for security and institutional reasons, so Somalia's next president will be selected by members of a bicameral national assembly picked by 14,000 delegates chosen by tribal elders.
It is expected to serve as a further model for other grains like wheat and corn, which have genomes that are so large and full of nonfunctioning DNA that they are considered impractical to sequence.
