Concerning rheological behaviour of nanofluids, only a reduced number of studies can be found (see, e.g. Prasher et al. [17], Kwak and Kim [18], Chen et al. [2, 9, 19], Rao [20], Namburu et al. [21], Chevalier et al. [11]), evidencing a gap where further studies concerning rigorous characterization of their Newtonian behaviour limits and their viscoelastic trend are necessary.
The Kaiser survey found little evidence of a gap between men's and women's views of the contraceptive mandate.
I find no such effect for Democratic women and provide evidence that a gap in elite support explains part of the cross-party difference.
Based on author Deborah Moggach's 2004 novel These Foolish Things, its success was hailed by some as evidence of a gap in the market for films targeting an older demographic.
But two of the most comprehensive and respected studies of executive compensation found little evidence of a gap between male and female chief executives after controlling for age and years of experience.
Nor do they constitute evidence of a gap between supply and demand, notes John Marburger, the president's science adviser.
Although boundaries are blurred, there remains evidence for a gap between researchers and users in terms of their expectations and achievements in collaborative heritage science research.
And funding appears to be insufficient: "Limited evidence indicates a gap between global adaptation needs and the funds available for adaptation," the report notes.
Despite this evidence, a significant gap in the translation of research-into-practice remains, with only a small proportion of effective interventions adopted.
