The phrase "ascertain with a" is correct and usable in written English.
It can be used when you want to express the act of finding out or determining something in conjunction with a specific method or tool.
Example: "To ensure accuracy, we need to ascertain with a reliable source before making any decisions."
Alternatives: "determine using a" or "verify with a".
Although our funnel meta-regression analysis showed a limited publication bias (Additional file 1: Fig. S2), the bias was always difficult to ascertain with a small sample number of the included studies.
Nothing in his own talk of "ascertainment" clinches an internalist interpretation that the person who infers must also himself access the reason and ascertain with a pramāṇa that it does justify the inference.
If, however, one rightly thinks P is the case, but did "not [first] ascertain with a pramāṇa" (tshad mas ma nges pa) the characteristics of Q, R, this is deemed to be, in Geluk (dge lugs) texts, a "true presumption where the [character of the] reason was not determined" (Tib.
But it will probably be impossible to ascertain with any confidence whether a cease-fire actually takes hold, as there has been no agreement between the Syrian government and Mr. Annan's team about deploying international monitors.
The distance between two points in space can be ascertained with a rod, or a tape, or by optical means, and the result depends essentially on the physical behavior of the instruments used.
Across this entire regime, NMR observables can report on the amplitude of atomic motion, and the kinetics of atomic motion can be ascertained with a wide variety of experimental techniques from real-time to milliseconds and several nanoseconds to picoseconds.
"While Juniper Research has questioned key players on their expectations of the market for both their own projects and the market as a whole, we believe that only when several commercial rollouts are underway can adoption rates be ascertained with a high degree of certainty".
"The extent of un-hedged exchange rate exposure in the corporate sector cannot be ascertained with a significant degree of confidence, given that systematic and comprehensive information on relevant offsetting variables (notably natural hedges from net export proceeds, foreign currency income from multinational operations and FX derivative positions) is not simple to construct".
All were right-handed with normal (or corrected) vision, and no psychiatric or neurological diseases, as ascertained with a detailed anamnesis.
Mortality and cause of death were ascertained with a validated program, the California Automated Mortality Linkage System.
