The phrase "a need to invoke" is correct and usable in written English.
It can be used when discussing the necessity or requirement to call upon something, such as a concept, rule, or resource.
Example: "In this situation, there is a need to invoke the emergency protocols to ensure everyone's safety."
Alternatives: "a necessity to call upon" or "a requirement to summon".
So why is there suddenly a need to invoke one for the programme editor?
You report that Janice Rogers Brown believes that the courts have turned away from the founders' emphasis on personal responsibility and that there is a need to invoke limits on government power.
And that is partly because, as the threat of genocide or of Israel's destruction has receded, a growing number of diaspora Jews neither feel comfortable with always standing up for Israel, nor feel a need to invoke Israel in defining what makes them Jewish.Yet the big Jewish diaspora institutions have not caught up.
That is, my ability to grasp is predicated on a pre-understanding of "grasping," a non-conceptual form of knowledge elicited by the practical demands of a situation without a need to invoke propositional content.
A need to invoke additional inputs to explain deletions suggests that hip-related motor pools may account for synchrony and relative timing of scratch rhythms but may not be sufficient to fully capture all motor behaviors observed.
In essence Nanney was questioning whether all the then known empirical evidence about biological function, which he reviews, regarding the stability of phenotype could be accounted for as a result of "genetic regulation", or whether there was a need to invoke "epigenetic regulation" in addition.
This, in turn, will increase lactate production, without any need to invoke tissue hypoxia.
Generally, a user does not need to invoke these procedures explicitly as they are called as needed within existing APIs: perception from 2D coordinates, perception from 3D coordinates, wedge assignment, graph (sub isomorphism matching, SMARTS matching, and canonicalization.
Since such a simple model with the translocation steps in the main reaction pathway not being in equilibrium could explain the force-velocity results, Dangkulwanich et al. argue that there is no need to invoke a more complex model with a secondary NTP binding site.
However, we now need to invoke a distinction between persons who hold a public office and persons who have an institutional role.
Anyway, thalamic abnormal activation (suggested on the basis of reduced HFO) would also explain the reduced amplitude of the first train of VEPs through an initial defect in synchronization of evoked responses without the need to invoke a condition of reduced cortical pre-activation.
