THE value of block diagrams in geographical and geological instruction cannot be questioned, but many teachers find these difficult to draw, especially on the blackboard, at short notice. Prof. Lobeck ...

Abstract: Orthogonal time frequency space (OTFS) modulation is strongly considered as a promising solution for high-mobility communications. In contrast to conventional modulation techniques, wherein ...

Sitting in front of a computer screen for five hours a day can dramatically increase the risk of depression and insomnia, new research suggests. Previous studies have focused on how too much screen ...

Welcome to Nat Geo Your Shot: National Geographic’s global community for aspiring visual storytellers. Find the community on Instagram @NatGeoYourShot and follow along for hashtag challenges, tips, ...

Abstract: The computer-based interlocking (CBI) system of urban rail is a safe-critical system. To keep the high reliability of the CBI system of urban rail, reliability analysis is very necessary and ...