The phrase "ascertain the base" is correct and usable in written English.
It can be used in contexts where you need to determine or find out the fundamental or underlying element of something, such as in mathematics or analysis.
Example: "In order to solve the problem, we must first ascertain the base of the equation."
Alternatives: "determine the foundation" or "identify the basis".
Ascertaining the base rates of these signs during match play will assist in interpreting the video signs on the sideline when reviewing possible HIEs during a match.
The KAP surveys (n = 36) were conducted before implementation to ascertain the knowledge base and to gain community acceptance for an intervention, and during the final year to understand behavioral and knowledge changes.
In addition, in four of the women (2%), we could not ascertain the genotype based on the AmpliChip result (Table 2).
Already at that time, pioneering studies designed to ascertain the genetic bases of breast cancer (Macklin MT 1954) detected a higher frequency of prostate cancer among the relatives of women with breast cancer, which led them to propose that prostate cancer could be the male equivalent of at least some female mammary carcinomas.
How much more legitimate would a victory be for Vice President Al Gore of several hundred votes (or even less) based on evaluating dimpled ballots or on his attempt to ascertain the vote total based only on selected counties favorable to him?
28 This income poverty line was calculated by STINMOD, in order to ascertain the poverty line based upon the entire Australian population.
By bioinformatics methods, random mutations were introduced in Sequence #2 to ascertain the probability of compensatory base pair changes arising by random base changes.
To ascertain the smoking prevalence of the base population, a new design was employed in the present study, which used the prevalence of smoking of living spouses as a substitute for the smoking prevalence of the base population.
A systematic review of the literature was undertaken to identify the features of PCC relevant to dentistry and ascertain the current research evidence base underpinning its use as a measure of quality within general dental practice.
PCA plots were visually inspected to ascertain the relationship between samples, based on microarray batch, severity of disease and family history.
