Electronics & Semiconductors

Scientists develop a tool for wireless charging of multiple devices

Researchers from the Faculty of Physics and Engineering managed to achieve simultaneous power transfer at various frequencies with the help of a metasurface. It will allow us to simultaneously charge devices from different ...

Automotive

New system created to prevent traffic jams

Holiday exodus. Nine in the morning. The roundabouts that lead to Valencia's A-3 motorway have come to a standstill. Can these traffic jams be stopped or, at least, decreased? A team of researchers from Valencia's Polytechnic ...

Engineering

New landmine detection method to reduce false alarm rates

Landmines pose a serious threat in conflict areas, yet modern detection systems struggle to discriminate between explosives and clutter. A project funded by the Army developed a new method for landmine identification that ...

Robotics

Bioinspired micro-robot based on white blood cells

A team of scientists from the Max Planck Institute for Intelligent Systems (MPI-IS) in Stuttgart invented a tiny micro-robot that resembles a white blood cell traveling through the circulatory system. It has the shape, the ...

Electronics & Semiconductors

Simple method for measuring the state of lithium-ion batteries

Rechargeable batteries are at the heart of many new technologies involving, for example, the increased use of renewable energies. More specifically, they are employed to power electric vehicles, cell phones, and laptops. ...

Electronics & Semiconductors

Wirelessly charging electric cars as they drive

Stanford engineers have taken a big step toward making it practical for electric cars to recharge as they speed along futuristic highways built to "refuel" vehicles wirelessly.

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Magnetic field

Magnetic fields surround magnetic materials and electric currents and are detected by the force they exert on other magnetic materials and moving electric charges. The magnetic field, at a given point, is specified by both a direction and a magnitude (or strength); as such it is a vector field.

In special relativity, the electric field and magnetic field are two interrelated aspects of a single object, called the electromagnetic field. A pure electric field in one reference frame is observed as a combination of both an electric field and a magnetic field in a moving reference frame.

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