Survey participation requests were sent to 709 unique clinical trialists (fig 1); 26 were subsequently excluded from our study population because contact information was invalid (n=18), technical difficulties prevented the author from accessing the survey (n=4), or the author was a secondary user of clinical trial data generated by another research group (n=4).
The cue expected to be most effective at orienting attention – the extra-vehicular cue – performs most poorly when the spatial information is either invalid or neutral.
This ensures that the location information is considered invalid after a reasonable amount of time as the user may be moving around.
These checks can detect errors where information is missing, invalid, or does not conform to a logical sequence of events.
Derived classes may over-ride this method with more information on why the label is invalid.
When the source location is known, the source strength can be estimated successfully by common Tikhonov regularization method, but it is invalid when the information about both source strength and location is absent.
"Whenever we have reason to think that a claim is invalid," Ann Guler, public information officer of the Los Angeles office of the FTC, says, "we ask the advertiser for substantiation of the claims.
This assumption is invalid because a node can send false location information too and may produce false results [64].
Your argument is invalid.
