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Chinese researchers have discovered the possibility of creating optical disks with a volume of 700 TB



The total amount of data generated globally is expected to reach 175 ZB by 2025. If you burn such a volume to Blu-ray discs, the stack would be 23 times the distance from the Earth to the Moon. This example shows how urgent is the need to develop storage technologies that can accommodate this amount of data.

The demand for storing ever-growing volumes of information has led to the widespread adoption of data centers. These centers consume a huge amount of energy (about 3% of the world’s electricity) and mainly use hard drives, which are characterized by a relatively small capacity and limited service life (in a data center environment – up to 3-5 years). The source calls optical data storage a promising and cost-effective alternative. However, the diffraction limit limits the size of an area on an optical medium that can be used to store a unit of information, resulting in a limited capacity for optical discs.

Researchers at USST (Shanghai University of Science and Technology), RMIT University and NUS (National University of Singapore) seem to have found a way to overcome this limitation. By using a nanocomposite material containing graphene oxide flakes in the rhodium of the carrier, they were able to significantly increase the recording density.

The result is equivalent to being able to write 700 TB of data on an optical disc of the usual 12 cm diameter. This is comparable to the capacity of 28,000 single-layer Blu-ray discs. Significantly, the development uses inexpensive CW lasers, which reduces operating costs compared to traditional optical recording methods that use more expensive and bulky pulsed lasers.

Although it is too early to talk about the practical application of the technology, it is already known that it is suitable for mass production of optical discs, so its potential is enormous.

The development also has the potential for optical lithography of nanostructures in carbon chips, which are urgently needed for next-generation nanophotonic devices.

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Vodafone is suing the UK over a contract to develop a hacker-proof communication line



The company considers it unfair that the contract was awarded to Fujitsu, although both bidders did not meet the requirements.

Mobile operator Vodafone filed in court against the UK government after losing a tender to develop a hacker-proof communications system, in which the Japanese company Fujitsu also took part.

Although both bidders were found to have failed to meet the government’s minimum requirements, Vodafone believes Fujitsu was unfairly awarded a £ 184m ($ 254m) contract to improve the communications system used by 532 British embassies and other agencies.

The Echo 2 project aims to provide secure communications for the UK Foreign and Commonwealth Office, employees and agents in over 170 countries.

According to the government, the current communications system operated by Vodafone is “outdated” and poses a risk to national security.

Vodafone went to court after Cable & Wireless, acquired by the operator in 2012, lost its long-term contract for the Echo 1.

“We do not believe that the procurement process was carried out correctly. The contracting authority itself admitted that the Fujitsu Solution was ‘not fit for purpose,’ said a Vodafone spokesman.

According to foreign ministry lawyers, Fujitsu’s proposal had problems with two requirements, but generally met the terms of the tender. Fujitsu representatives did not comment on the situation.

The trial in this case is scheduled for January 2022. The court allowed the UK government to enter into a “conditional contract” with Fujitsu. The details of the contract were not disclosed due to security concerns.

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Smartwatches are under $ 100. LeTV Watch W6 presented



LeEco has already presented the LeTV S1 smartphone as part of its return to the market, and now it has also shown a smart watch.

The LeTV Watch W6 model is offered at a price of $ 95, and is now available for $ 80 at all. At the same time, there is a good set of characteristics.

There is an AMOLED display with a diameter of 1.39 inches, there is protection against water (IP67), autonomy is two to three days with normal use and up to a week in standby mode.

The watch doesn’t seem to have an operating system, but there are dozens of watch faces, a heart rate sensor, a pulse oximeter function, sleep monitoring, and a workout tracking function (seven types of load). But there is no GPS module here.

The watch weighs 70 g and works with both Android and iOS.

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Three former Apple engineers helped disassemble the Apple Watch Series 7. The watch has more in common with the iPhone 13 than you might think



Specialists of the popular iFixit resource, specializing in the repair of various electronics, disassembled the new Apple Watch Series 7 smartwatch and shared the results with the public.

Firstly, the watch scored 6 points on a 10-point scale of maintainability and generally positive reviews for its modular design, easy access to the screen and battery. Experts also praised Apple for keeping the Apple Watch Series 7 compatible with previous generations of bands, right up to the very first original Apple Watch.

Three former Apple engineers helped disassemble the Apple Watch Series 7. The watch has more in common with the iPhone 13 than you might think

IFixit notes that despite minimal external changes, there are several major updates to the Apple Watch Series 7.

Three former Apple engineers helped disassemble the Apple Watch Series 7. The watch has more in common with the iPhone 13 than you might think

As mentioned several times, the main difference between this device and the Series 6 is the enlarged display. Disassembling iFixit revealed that the watch uses an OLED panel with an integrated touchscreen (on-cell touch), this technology debuted in the iPhone 13.

Three former Apple engineers helped disassemble the Apple Watch Series 7. The watch has more in common with the iPhone 13 than you might think

According to experts, this is an unusual approach for Apple, which usually prefers to experiment with new screen technologies on watches, and then implement them on smartphones – as happened with OLED, variable refresh rate and the function of “always on” screen.

Three former Apple engineers helped disassemble the Apple Watch Series 7. The watch has more in common with the iPhone 13 than you might think

IFixit partnered with three former Apple engineers to disassemble the Apple Watch Series 7. As they noted, it was the new display that could cause delays in production and force the company to release the device later than it would like.

When Apple announced the Apple Watch Series 7 in September, it didn’t announce a specific release date. Former Apple engineers said this is usually indicative of delays, and the most likely cause is a manufacturing glitch caused by watch displays. They explained, “The screens have some of the most complex supply chains and assembly processes in the industry.”

The iFixit experts also found that the Apple Watch Series 7 has a larger battery compared to its predecessor. However, this did not lead to an increase in battery life, since the larger screen consumes more power.

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