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Robotics

The Hand at the End of the Robot Arm: The End Effector

The end effector is the device at the tip of a robot arm that actually does the work. This article covers where it attaches, the types of grippers, process tools and sensors, how t

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Physics

Electric Whirlpools Inside Metal: Eddy Current

An eddy current is a swirling electric current induced inside a conductor such as metal by a changing magnetic field. This article covers how eddy currents arise, Lenz's law, why t

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Logistics

The Doorstep Is the Hardest Stretch: Last-Mile Delivery

Why is the short trip from a local depot to your front door the costliest and hardest part of logistics? This article covers what last-mile delivery is, why it is so expensive, the

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Education

Finding the Way While Learning: Formative Assessment

Formative assessment checks what students know and don't know while learning is still underway, and uses the results to improve both teaching and learning. We look at where the ter

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Library & information science

The Rich Get Richer: The Matthew Effect

The Matthew effect is the phenomenon in which a person or work that starts slightly ahead gains more opportunities and recognition thanks to that lead, so the gap widens over time.