TfL combines open and closed loop systems, using Oyster Cards, contactless card payments, and NFC Google or Apple pay, alongside physical ticketing. Transport for London (TfL) has long been regarded ...

Boat engines have either open or closed loop cooling systems. How do these two differ, and is one better than the other? Here's everything you need to know.

People with type 1 diabetes require continuous insulin treatment and must regularly measure their glucose levels. With open-loop therapies*, insulin administration is manually controlled, while hybrid ...