Recent cyberattacks on U.S. water and wastewater systems (WWS) are highlighting the escalating threat to our nation’s critical infrastructure and the practical challenges of securing it.

These incidents underscore an important challenge: The connectivity that utilities depend upon must be designed and operated with security as a core priority rather than a secondary…

When a time series displays a pattern that repeats itself periodically it is said to have seasonal effects. The word seasonal may apply to days, weeks, months, quarters, or any pattern that recurs regularly throughout the data. While these seasonal effects will complicate our analysis, their regularity can be utilized to improve our forecasts. Two ways of doing this are the topic of this…

Before something important leaves the ground, someone has to be willing to ask an uncomfortable question: What could make this fail?

That question takes on a different meaning when the “something” is a spacecraft.

During the development of NASA’s X-43A, an experimental hypersonic aircraft, the NASA Engineering and Safety Center received a dissenting opinion raising…