The phrase "at proof of" is not standard in written English and may cause confusion.
It could be used in contexts discussing evidence or verification, but it is better to clarify the intended meaning.
Example: "Please provide the necessary documents at proof of your identity."
Alternatives: "upon proof of" or "with proof of".
"Many deployments are still at proof-of-concept stage, but we have seen some phenomenal initial results," says Niederhofer.
Although important progress has been made in the fabrication and use of 3D nanostructures for biology, current research is mainly at proof-of-concept stage and has yet to make its way to tackle real biological questions.
Everyone is aware of the responsibility of the US in creating the circumstances for the appearance of the Taliban, who are then pointed at as proof of the backwardness of Islam in general.
Mr. Blair's critics saw his inability to regain custody of a total of nine British detainees at Guantánamo as proof of his subjugation to Washington.
Republicans have cited the high unemployment figure, at 9.8percentt, as proof of the failure of the stimulus, which they voted overwhelmingly opposed.
And, sadly, there is still no shortage of evidence that can be produced, or at least interpreted, as proof of bias.
All this aims at accelerating proof-of-concept as a major value inflection point of drug development.
This paper presents the method at the proof-of-concept stage of development and future work is required to extend the method to more realistic catchments.
While most of these endeavours are still at the proof-of concept stage, the first commercial examples are beginning to emerge.
Testing of the pAuNPs at a proof-of-concept level demonstrated its higher electrocatalytical activity than other two structures towards oxygen reduction in both acidic and alkaline media.
