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Comet's hot past

13.09.2006

Samples of matter from the tail of Comet Wild 2, brought to Earth by the Stardust spacecraft in January 2006, turned out to contain volcanic minerals that could only form at very high temperatures. These are olivine, pyroxene and spinel.

Meanwhile, it is believed that comets are formed and spend most of their "life" in the so-called Kuiper belt - a ring of cosmic debris of various kinds beyond the orbit of Neptune, that is, in deep space conditions, where the temperature is close to absolute zero. No wonder comets are called "dirty snowballs" - they are commonly believed to consist of ice mixed with mineral dust.

It turns out that at least part of the substance of the comet Wild-2 originated somewhere in the immediate vicinity of the Sun, closer to Mercury, or near another star, and only then was somehow transferred to the cold Kuiper belt. Comet dust particles were captured while flying through the tail into a special trap with cells made of "jelly" based on silicon dioxide. Dust particles flew into this material and got stuck in it.

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Device for wireless charging of gadgets at a distance of up to a meter 02.01.2018

San Jose, California-based tech startup Energous has officially announced that it has received Federal Communications Commission (FCC) certification for its WattUp Mid Field wireless charger, which can remotely charge mobile devices up to 3 feet (almost 1 meter) away. .

The WattUp Power Transmitter allows you to charge multiple mobile devices at the same time and supports the charging mode of any number of gadgets - smartphones, tablets, keyboards, headphones, etc.

The technology works within a designated radius, provided that the mobile device has a WattUp receiver, built-in or external discrete.

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Unlike popular close-range wireless chargers, which use the principle of electromagnetic induction, WattUp technology involves the conversion of electrical energy into radio frequency radiation transmitted by the transmitter unit to any gadget with the appropriate receiving part. It is for this reason that the prototype WattUp Mid Field transmitter required FCC certification as an RF emitting device.

Appropriate WattUp software, using the company's proprietary algorithms, provides dynamic beam remapping for focused RF energy delivery to the receiver, and also prioritizes charging for different devices.

The technology is highly scalable, with devices charging fully automatically as needed. The location of the gadget in the immediate vicinity of the receiver (contact method) is required only to activate the high-speed charging mode.

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