A ripe apple falling from a tree has inspired Sir Isaac Newton to formulate a theory that describes the motion of objects subject to a force. Newton's equations of motion tell us that a moving body ...

Understanding inner core oscillations is key to grasping Earth's rotation variations and magnetic field changes, linking deep processes to surface effects.

Grease both lubricates and keeps contaminants out of bearings. But its job is often made difficult by back-and-forth, or oscillatory, motion. Printing presses are a classic example: Frequent returns ...

Oscillating motion can quickly destroy even over-sized bearings. Understanding and treating the problem, rather than the symptoms, is the cure. Grease both lubricates and keeps contaminants out of ...