Business

Chinese shoppers splurge in world's largest shopping fest

Chinese consumers are expected to spend tens of billions on everything from fresh food to luxury goods during this year's Singles' Day online shopping festival, as the country recovers from the pandemic.

Electronics & Semiconductors

A molecular shift register that can be controlled by external charges

In recent years, electronics engineers have been trying to create molecular-scale electronics, new types of devices that use single molecules. In order for these devices to work, however, scientists first need to identify ...

Energy & Green Tech

Lithium-ion battery research 'flowers'

Lithium-ion batteries work by shuffling lithium ions between a positive electrode (cathode) and a negative electrode (anode) during charging and in the opposite direction during discharging. Our smartphones, laptops, and ...

Electronics & Semiconductors

Tiny micro supercapacitor for wearable devices

A tiny microsupercapacitor (MSC) that is as small as the width of a person's fingerprint and can be integrated directly with an electronic chip has been developed. This has attracted major attention as a novel technology ...

Electronics & Semiconductors

Implantable device can monitor and treat heart disease

Pacemakers and other implantable cardiac devices used to monitor and treat arrhythmias and other heart problems have generally had one of two drawbacks—they are made with rigid materials that can't move to accommodate a ...

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Engine

An engine is a mechanical device that produces some form of output from a given input. An engine whose purpose is to produce kinetic energy output from a fuel source is called a prime mover; alternatively, a motor is a device which produces kinetic energy from other forms of energy (such as electricity, a flow of hydraulic fluid or compressed air). A motor car (automobile) has a starter motor and motors to drive pumps (fuel, power steering, etc) – but the power plant that propels the car is called an engine. The term 'motor' was originally used to distinguish the new internal combustion engine -powered vehicles from earlier vehicles powered by a steam engine (as in steam roller and motor roller).

Military engines included siege engines, large catapults, trebuchets and battering rams.

This text uses material from Wikipedia, licensed under CC BY-SA