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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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Phones

Samsung is preparing a smartphone that will be weaker than its predecessor two years ago. Galaxy M54 will receive SoC Exynos 1380

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Samsung is preparing a smartphone that will be weaker than

Smartphone Samsung Galaxy M54 lit up in the Geekbench database. Unfortunately, as previously reported, he will not receive any SoC Snapdragon 888, although this is expected.

Samsung is preparing a smartphone that will be weaker than its predecessor two years ago.  Galaxy M54 will receive SoC Exynos 1380

Samsung’s mid-budget novelty will receive the same platform as the Galaxy A54. Probably, the Galaxy A34 will also receive it.

We are talking about the not yet presented Exynos 1380, which will replace the Exynos 1280. In the benchmark, the new SoC scores 750 and almost 2700 points in single-threaded and multi-threaded modes, respectively. And this is almost the level of Snapdragon 778G, that is, this is an excellent result for a mid-budget smartphone. True, we are only talking about processor performance, and we do not yet know which GPU the new SoC will receive.

Samsung is preparing a smartphone that will be weaker than its predecessor two years ago.  Galaxy M54 will receive SoC Exynos 1380

It is also worth noting that the Galaxy M52 was also based on the Snapdragon 778G, and the Galaxy M53 received a slightly less productive Dimensity 900. Thus, the Galaxy M54 model, at least in terms of the processor part, will be slightly inferior even not to its predecessor, but to the device two years ago.

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Phones

Bullitt Group and MediaTek want to launch a satellite-enabled smartphone

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Bullitt Group and MediaTek want to launch a satellite enabled smartphone

The British manufacturer Bullitt Group, which produces devices under the brands CAT and Motorola, intends to release a smartphone with satellite communications. They want to implement this project together with the Chinese chipmaker MediaTek.

Bullitt Group and MediaTek want to launch a satellite-enabled smartphone

It is assumed that the new smartphone will provide calls and text data via satellite, although it is not yet clear how this will work. The device itself will be released in the first quarter of 2023.

The novelty has been developed for two years, so the project is nearing completion. According to Bullitt Group co-founder Richard Wharton, previously the seamless integration of satellite communications into a smartphone was accompanied by problems, but now they are solved.

The new phone will be the first to use MediaTek’s 3GPP NTN chipset. The software will keep track of what type of connection is currently being used – Wi-Fi or cellular network. The connection to the satellite will be carried out only in the absence of both of these options.

It is claimed that the time to connect to the satellite and send a message is about 10 seconds. This is longer than a regular connection, but still pretty fast.

Note that Apple already has this and Samsung will soon have it.

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Components

The GeForce RTX 4080 can also be overclocked to incredible frequencies. Galax RTX 4080 SG took the frequency over 3.6 GHz on the core

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The GeForce RTX 4080 can also be overclocked to incredible

Galax continues to prove that they are one of the best when it comes to overclocking graphics cards. After the departure of EVGA, Galax as a whole is probably the only company that places a strong emphasis on this direction.

The GeForce RTX 4080 can also be overclocked to incredible frequencies.  Galax RTX 4080 SG took the frequency over 3.6 GHz on the core

The GeForce RTX 4080 SG model was able to overclock to a frequency of over 3.6 GHz on the core. More precisely, we are talking about a frequency of 3615 MHz. This is slightly less than the RTX 4090 HOF at 3.8 GHz, but it’s still an incredible figure. Especially if you keep in mind that the GeForce RTX 4080 SG is no match for the HOF versions. At the same time, it is not yet known whether Galax will release the RTX 4080 HOF.

The GeForce RTX 4080 can also be overclocked to incredible frequencies.  Galax RTX 4080 SG took the frequency over 3.6 GHz on the core

Galax, unfortunately, does not disclose overclocking details, but it can be assumed that we are talking about the use of liquid nitrogen, as in the case of extreme overclocking RTX 4090 HOF.

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