Advanced battery technologies are being developed, it said, "but all face serious technical challenges".
For one thing, the improvement of chips now faces serious technical challenges.
Moreover, experts said the new test was not ready for wide use; serious technical challenges remain to be worked out.
As the Hotshots carried their chain saws to Doce's western edge, dispatchers faced serious technical challenges.
Li-Air batteries could theoretically achieve fossil fuel-like energy density, but there are serious technical challenges — ones the NASA team will be looking at.
With finite-time convergence, non-smoothness has to be considered, which poses serious technical challenges in the analysis and synthesis of closed-loop finite-time systems.
Serious technical challenges are posed by the accurate measurement of the multi-allelic copy number variation displayed by DEFA1A3, because most individuals have 6 or more repeats.
As a consequence, producing highly charged ions with a source setup, at ground, is rather difficult and becomes a serious technical and financial challenge if the source is on a high voltage terminal.
Jenkins' hire was a sign that Pinterest, which has three non-technical co-founders, was starting to get serious about the technical challenges of building up its site's infrastructure.
