The relative structure of these groups might differ from country to country and over time, invalidating ecological analyses.
Although nurses' refusal to defer consent for blood samples did not greatly impact on CATCH findings, 49 such refusal may have implications for other critical care trials, either burdening families if they are approached for prospective consent at an unsuitable time, invalidating trial results, introducing bias or resulting in missing data.
Our objective is to determine whether people seem to follow the benchmarks provided by queuing theory or whether psychological costs and perceptions of time invalidate these benchmarks.
The court also turned down an appeal by Iowa from a ruling by the United States Court of Appeals for the Eighth Circuit, which struck down that state's so-called partial-birth abortion law last year at the same time it invalidated the Nebraska law.
Team GB heptathlete Ennis ran 12.75 seconds but her time was invalidated because nine hurdles, instead of the necessary 10, were put on the track.
Surprisingly though, the hardest thing for me--next to trying to grasp the act of rape itself and why someone would do that to another person--isn't talking to the survivor in the room, but rather, it's after, on the drive home, because I know what they'll face: I know they will be invalidated time and time again, by friends, family, the community, and law enforcement.
From the experiment, we also see that the compensation at a certain time will be gradually invalidated with time because of the short-term instability of the oscillator's output frequency.
Evidence emerging from research and pilot scale field demonstrations of CO2 storage demonstrates that, with proper site characterization and sound operating practices, retention of stored CO2 will increase with time thus invalidating the premise of an ever growing risk.
They are fully traceable and we can cancel them at any time by invalidating the barcode.
