The phrase "a fact observed" is correct and usable in written English.
It can be used when referring to a fact that has been noted or witnessed in a particular context or situation.
Example: "The study concluded that a fact observed during the experiment was crucial for understanding the results."
Alternatives: "an observed fact" or "a noted fact".
A fact observed by the Australian driver Ryan Briscoe, who was competing in Las Vegas but not involved in the crash and posted on Twitter: "I'd like to see future IndyCar/Open wheelers with closed cockpits one day, like modern Le Mans LMP1 cars have today".
The lognormal probability distribution of grain size in polycrystalline nanomaterials is used, a fact observed both theoretically and experimentally [23 26].
In 1848, the tricolor was present in Focşani and Râmnicu Sărat (on opposite sides of the principalities' border) during demonstrations of fraternity held by Moldavians and Wallachians, while in 1857, around the time of the Moldavian Ad hoc Divan, the civilian population adopted the tricolor as a symbol of union, a fact observed by Count Alexandre Walewski, French foreign minister.
In a small country, the impact of economic and political instability is profound, a fact observed in the shared narrative across the sample.
Indeed, Tenerife harbours the highest genetic diversity for Cheirolophus in the archipelago, a fact observed also in other Canarian genera such as Bystropogon[ 76], Sideritis[ 63] or Aeonium[ 1].
The supplementation of collagen gels with CSA led to a further inhibition of basal DNA synthesis levels and 2(b)), a fact observed also in monolayer cultures and Table 1), in agreement with reports in the literature coming from different cell types [ 33, 34].
However, an interesting fact observed was that the fighting style may require different biotypes, since a pass fighter had a lower percentage of fat than a guard fighter [26].
This is an interesting fact observed during the experiments: the MC based approach seems to be more sensitive than the GA based approach with respect to the strengths of the SRLS.
As a man and a Hasid, he in fact observed far more religious laws than I am ever likely to.
Until a few weeks ago it was a foregone conclusion that Turkey's parliament, dominated as it is by the right, would have Mr Ocalan sent to the gallows, even though Turkey has in fact observed a de facto moratorium on executions since 1984 in order to improve its chances of joining the European Union.
And if a process is in fact observed to occur, then it ought to satisfy all conservation laws that we have introduced.
