These mesopores played a major role in oxidation reactions and improved the electrochemical performance. Using the rotating ring disk electrode method, they discovered that macropores also allowed a ...

In a mixed electrolyte of 1 mol L-1 KOH and 0.1 mol L-1 glycerol, the onset potential of the electrode dropped to 1.16 V RHE, significantly outperforming OER. Rotating ring-disk electrode (RRDE) ...

The idea is to pass a small spool of magnet wire through the toroid’s core while simultaneously rotating the toroid ... That obviously requires a winding ring that can be opened up to allow ...

The Ring of Fire is home to 75% of the world's volcanoes and 90% of its earthquakes. 2 min read The Ring of Fire is a roughly 25,000-mile chain of volcanoes and seismically active sites that ...

When it's a ramjet that uses rotating detonation technology to propel aircraft at hypersonic speeds. A case in point is Venus Aerospace's new Venus Detonation Ramjet 2000 lb Thrust Engine (VDR2).

A hard disk comprises one or more aluminum or glass platters, coated with a ferromagnetic material. Although the terms "hard disk" and "hard drive" are used synonymously; technically, the disk ...

The Oura Ring 4 builds in major upgrades spec for spec from the Oura Ring Generation 3. In its slimmest design to date, it comes in a streamlined titanium build and trims its interior recessed ...

Smart home security company Ring announced today that it’s bringing 24/7 continuous video recording (CVR) to its smart security cameras. This will allow a camera to record continuously rather ...

You’re on the hunt for a video doorbell – an essential piece of smart home tech, in our eyes. You’re set on grabbing one of the best Ring doorbells. They work well with the rest of your Amazon Echo ...

Like its predecessor, the Oura Ring 4 offers users a subtle, passive health-tracking experience with a device that blends into their daily lives by mimicking traditional jewelry. The new model ...

So which smart ring is the best? To find out, I called in six smart rings currently on the market: the Oura Ring, Ultrahuman Ring Air, Circular Slim, Samsung Galaxy Ring, RingConn, and Evie Ring.