Sentence examples for challenged to define from inspiring English sources

Health and environmental research organizations such as NIEHS have been challenged to define and measure outcomes distant in time and space from environmental health research (Van Houten et al. 2000).

While it is challenging to define precise triggers ex ante, we might be able to determine them in principle.

Due to the variety of existing methods, it is challenging to define an appropriate method for each decision problem.

It is suggested that future VE research increasingly explores this notion although it may be challenging to define the 'prerequisite' concept for VE learning.

The accuracy of the analyses, however, depends on the input parameters, some of which are challenging to define for a nonlinear problem.

This also allows for a description of uncertainty, which would currently be challenging to define uniformly for InSAR measurements due to the diversity of data, processing and analysis methods widely used.

Intuition is challenging to define, despite the huge role it plays in our everyday lives.

It is challenging to define the precise factors that regulate gene expression in diabetic cardiomyopathy in vivo since the changes observed can be induced by diabetes or diabetes-related abnormalities.

However, it has been challenging to define single quantitative trait genes (7).

This protocol provides background for other investigators interested in researching this population, which is challenging to define, reach, and engage.

Despite the importance of physical activity, it is challenging to define what physical activity actually means and how to capture the important aspects of physical activity.