Strain Free Objectives - Stress introduced into the glass of an objective during assembly can produce spurious optical effects under polarized light, a factor that could compromise performance.

It provides full cancellation of spurious effects; cable resistance of up to 15 Ω can be handled.

For accurate work both temperature and pressure have to be precisely controlled and spurious effects due to the difference between the temperature of the specimen and that of the pressurizing gas allowed for.

They convinced themselves this was the causal story even though it's so obvious in retrospect that it's a spurious effect.

Secondly, since the nature of the harm is usually unknown, larger numbers are needed than if it could be specified in advance to avoid spurious statistically significant adverse effects.

Those setups have been improved against spurious effects by isolating and canceling thermal transfers, vibration and electromagnetic interference, while getting better current feeds and bearings.

We have matching for age and for education but it is possible that people who are older and well-educated have special opinions; such a person happens to receive X and may give rise to a spurious effect.

It is the easiest and cheapest of all methods of creating a spurious effect.

"The gutka makers say the ban will have spurious effects," he continued.

"Tighten one of these on a new crystal and you'd create uneven stresses through the long axis of the crystal, introducing spurious piezoelectric effects and probably a flaw in next to no time."