Various factors, including the changing profile of the thin-film with superheating and the use of small-scale and one-dimensional higher-order nonlinear governing differential equations, create difficulties for the study of the conjugated heat transfer of the thin-film and its surrounding regions.
In addition to the selection of a control for comparisons, another major difficulty of the study was the choice of appropriate outcome measures sensitive to the impact of an NC.
One of the difficulties for the studies of Ich is the problem involved in long-term maintenance of Ich isolates.
Another difficulty for the genomic study of black pepper is the lack of a sequenced genome from the Magnoliid group, describe as basal angiosperms group [ 23, 24].
A drawback of vitrification is the poor SNR in images of vitrified specimens, which poses severe difficulties especially for the study of small molecules.
However, the inherent difficulties for the structural study of protein-membrane complexes still hinder the appearance of specific molecular models of the active species.
Under the superlinear conditions (1.5), there is no twist condition for, which brings difficulty to the study of the existence of periodic solutions of (1.4).
Of the 34 participants who did not participate in the prospective phase, the most frequent reason for non-participation was difficulty attending the study clinics on a weekly basis due to transport and/or distance problems.
The main weakness of this study is the short time period which added difficulty for us to study the possible effect of the training course on the quality of patient care.
As a result of the national security situation at that time (the old regime in Iraq continually threatened the sovereignty of Kuwait), and the difficulty of obtaining permission for the study from the military authorities, coupled with the conservative nature of the society, and the problem of contacting the sampled subjects, it was six years after the GW that the study could commence.
