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Wearable fitness sensor detects muscle fatigue during exercise

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A team of researchers from King Abdullah University of Science and Technology (KAUST) in Saudi Arabia is developing a wearable device fitness able to understand the wear and tear of the user’s muscles.

The device uses a material-based sensor MXene and bluetooth to connect with nearby digital devices. The technology takes real-time measurements of the athlete’s physical condition, correlating changes in sweat pH with the buildup of fatigue-inducing acid in muscle cells.

“As we exercise and our muscles get tired, the sensor sees the new chemical environment and produces different electrical resistance versus stress curves. By comparing these curves with the reference curves for a given sensor, we can determine the pH of the sweat and how tired the muscle is,” says KAUST researcher and lead author of the study, Kang Lee.

The article with the results of the study was published in Small Methods scientific journal earlier this month.

What is MXene?

Mxenes are composed of non-toxic, two-dimensional metals in combination with carbon or nitrogen atoms, and because they offer naturally high conductivity, they are great biosensors for detecting small chemical changes.

KAUST researchers have developed a wearable sensor prototype with a new MXene-hydrogel compoundKAUST researchers have developed a wearable sensor prototype with a new MXene-hydrogel compoundSource: unsplash

In 2019, Professor Husam Alshareef developed an electrode composed of MXene integrated into a wearable device, which absorbs the user’s perspiration to detect small changes in chemical concentrations, such as glucose and lactic acid.

In collaboration with a team at KAUST, they combined MXene with hydrogels and found an improvement in performance. “Because MXenes have a high concentration of negative charges on their surfaces, the horizontal arrangements strongly affect ion movements within the hydrogel and therefore we can measure different levels of pressure change,” says Alshareef.

So they set about developing the prototype wearable device capable of tracking muscle movement and understanding chemical changes.

ARTICLE Small Methods: doi.org/10.1002/smtd.202100819

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Software

This Telegram feature allows you to store unlimited files online

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Highly appreciated by Internet users for the transfer of unlimited files, the Telegram application receives a new very practical service. Developers have used an end-to-end encrypted messaging app API to create an unlimited cloud storage service. Good news for people who want to keep documents and files for free.

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Credits 123rf

A cloud storage service on Telegram

TeleDrive developers are innovating with a very interesting new service. They relied on the API available on Telegram to develop a free cloud storage system. You can then use it to store files much like on Google One or OneDrive. To use it, simply link your Telegram account and associate it with TeleDrive to start downloads.

Read also : 7 Telegram Features That Might Make You Ditch WhatsApp

However, note that this service has some limitations. In free mode, the user is limited to 1.5 GB bandwidth and daily 2 GB downloads. However, it is possible to remove this restriction by subscribing to a $10/year subscription with TeleDrive. You will be able to download large volumes of files no matter the time of day.

The peculiarities of Telegram’s cloud storage

Telegram is an end-to-end encrypted instant messaging application. In view of this, the files stored on TeleDrive are of a confidential nature. That said, note that it is possible to make them public and share it by message to your contacts on Telegram. You can generate a URL that anyone on the internet can easily access.

The use of this cloud storage service, however, poses a big concern. TeleDrive has not established any collaboration with the administration that governs the operation of Telegram. At any time, the latter could therefore decide to eliminate this service. It just needs to limit or break its API from its cloud storage. It is for this reason that specialists recommend using it as a secondary backup solution.

SOURCE: LIFEHACKER

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Electric Cars

The Tesla Cybertruck electric pickup truck will have a “little brother” in miniature form

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While Elon Musk and Tesla continue to push back the start of production of the Cybertruck electric pickup truck to ever later dates, information has appeared on the network about the possible release of another version of this car.

The Tesla Cybertruck electric pickup truck will have a

Initially, the rather well-known Indian analyst Trip Chowdhry from Global Equities Research, who specializes, among other things, in Tesla, shared the information.

According to the source, Tesla will present two versions of the Cybertruck at a special event in March 2022.

Moreover, Chaudhry notes that both versions will receive “significant changes” compared to the Cybertruck originally shown. Chaudhry did not go into details of the changes, but noted that the second version of the Cybertruck will be about 15-20 percent smaller than the first. The bodies of both cars will reportedly be built by the same Texas-based Steel Dynamics company, which operates about 100 miles from Tesla’s Texas plant.

Chaudhry expects to hear the first official news on the matter on January 26, when Tesla will report earnings to investors.

Recall that in November 2019, Elon Musk himself said that in the long run it makes sense to add a more miniature Cybertruck to the lineup. Since then, however, he has not further developed the idea publicly.

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Software

WhatsApp will soon be able to draw with different strokes

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The Meta (former Facebook) team of the popular WhatsApp messenger is working on a new interesting feature for users.

WhatsApp will soon be able to draw with different strokes

In the latest beta version of WhatsApp for Android, there are hints of new drawing tools. As the thematic resource WABetaInfo drew attention to, two new pencils have been added to the built-in WhatsApp image editor in addition to the existing pencil. The pencil icons indicate that the new pencils will allow you to draw thicker lines on images or videos.

WhatsApp will soon be able to draw with different strokes

WhatsApp currently allows you to change the color of the pencil, but there is no way to increase or decrease the thickness of the stroke. In addition, WhatsApp has begun work on a blur tool. This should make it easier to share screenshots and photos by allowing you to “blur” the areas you need before sending.

It is not yet clear when the new tools will become publicly available in the stable versions of WhatsApp.

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