But relying on a plastic card as proof of certification also introduced challenges to divers, instructors and dive shops.
Yet the intersection of "national security" and "biologically-inspired security informatics" introduces challenges to usability, utility, and adoptability that may not be adequately addressed by standard software engineering paradigms, even those that emphasize active user participation in the design, development, and testing of new technologies.
Finally, it is possible that the measurement of secondhand smoke exposure using serum cotinine analysis is approaching its limits of detection and possibly introducing challenges to demonstrate further declines in exposure.
Medical tourism introduces challenges to decision-making that impact and are impacted by the physician-patient trust relationship a relationship on which the foundation of beneficent health care lies.
The numerical intersection computations introduce challenges relating to the accuracy of the resulting representation, efficiency with which the computation is carried out, and robustness of the result to small variations in geometry.
"Given the popularity of photographing food we are looking at ways to introduce challenges and contests around that, like cooking something and rating it and eventually winning points or money-off vouchers," says Kate Bradshaw, head of digital at Food Network.
Later levels introduce challenges like fire.
This introduces challenges for scale-up to commercial demands.
The web has made life easier, but it has also introduced challenges and ethical questions pertaining to personal data, access to information and privacy.
