It's well established that the universe is expanding, but there's serious disagreement among scientists over how fast it's happening.

Abstract: Background:. Usability plays an important role in user experience and directly influences users’ satisfaction and overall perception of the IT solution. A combination of subjective and ...

Abstract: Wheel–rail force is a critical physical parameter in rail transit, playing a vital role in assessing both the operational safety of vehicles and the durability of structural service. However ...