Face shields ineffective COVID-19 contagion prevention, supercomputer simulation revealed: Plastic protective screens are virtually ineffective at avoiding contact with respiratory sprays— which are the tiny droplets that are suspended in the air-according to a simulation of Japan's Fugaku supercomputer, the fastest in the world.

In this regard, there are doubts as to whether the use of facial protective screens helps to prevent the spread of the coronavirus.

Recently, a team from the Center for Computational Science (R-CCS) of the Riken research institute, on its campus in the city of Kobe, Japan, has completed a simulation with Fugaku, according to the Vanguard.

Thus, it has revealed that almost 100% of aerial drops that are smaller than 5 micrometers - which is the millionth part of a meter— escape through the usual plastic screens that are now used as facial screens to try to prevent infections by COVID-19.

“Judging by the results of the simulation, unfortunately the effectiveness of facial protective screens to prevent droplets from spreading through the mouth of an infected person is limited compared to masks, " explained the head of the R-CCS team, Makoto Tsubokura, who conducted the study.

During the simulation, a combination of the flow of air from people's breathing and thousands of small drops of different sizes, from less than one micrometer to several hundred micrometers, were reproduced, which are expelled during this process.

Face shields ineffective COVID-19 contagion prevention

The Riken institute team has concluded that the screens become ineffective for droplets that are less than 20 micrometers.

” However, somehow, it works for droplets larger than 50 micrometers, " Tsubokura added.

He also commented that those people for whom it is not recommended to use masks because they have some type of respiratory condition, could use facial screens limiting them to outdoors and indoor environments that have good ventilation.

About a month ago, another simulation of the R-CCS with the Fugaku supercomputer has virtually shown that disposable non-woven masks contain drops emitted when coughing better than those made with fabrics such as cotton and polyester for their ability to block respiratory drops that may contain the virus, according to the Vanguard.

However, the study has shown that these types of masks are also effective.

Thus, non-woven fabric masks blocked almost all drops expelled when coughing, while all other types of caps retained at least about 80% of the sprays, which proved their effectiveness in slowing and curbing infections by COVID-19.

"The most dangerous thing is not to wear a mask," Tsubokura stressed.

“It is essential to use the mask, even a less effective cloth, " he said.

End of the Face shields ineffective COVID-19 contagion prevention article


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China "has no reason" to authorize the subsidiary with which TikTok intends to circumvent Trump's veto, according to a Chinese government newspaper, which describes the deal as " dirty and unfair"

China has no reason to approve the "dirty and unfair" deal by which the Chinese startup ByteDance has been forced to create a subsidiary with which to keep its TikTok business in the US. This is what concludes an editorial of the China Daily, which is edited by the Asian government itself.

The subsidiary, named TikTok Global, will be able to bypass the Trump administration's veto. 80% of the company will be retained by the Chinese firm, and the rest of the percentage will include Oracle and Walmart as shareholders. The firm will go public.

The China Daily Notes in its editorial that what the U.S. has done to TikTok is "almost the same" as what mobsters do when they force "legitimate companies" to subscribe to "an unfair business." The agreement, incite, is based on "harassment and extortion," and accuses Oracle and Walmart of such practices.

The article, which you can consult here and picks up Reuters, denounces that" national security has become a weapon " for Washington, when the U.S. government wants to crush signatures "from foreign countries that are surpassing their domestic competitors."

"ByteDance would not only lose control of the company, but could also lose the technology it has created," which is why the Chinese government "has no reason" to give" green light " to this deal.

Trump forced ByteDance to seek a U.S. partner to keep TikTok running in the country, an application he considered a cyber-espionage tool, by signing an executive order that would ban its operations if it did not sell to a local company starting in mid-September.

"It looks like TikTok can continue in the US, but only if ByteDance allows Oracle and Walmart to take over the company. Of the five board seats that have been proposed for the subsidiary, four would be American and one Chinese, " laments the China Daily.

"The figure of a director of Homeland Security would be included in the council, and although in theory Bytedance will continue to maintain the TikTok algorithm and license it for its subsidiary, Oracle will have permission to check the source code and its updates."

"Since TikTok and its Chinese version, Douyin, share the same code, this means that the US could know how Douyin works," the newspaper abounds.

The video recommendation algorithm is one of the keys to TikTok's business, which has about 100 million users in the United States. This algorithm feeds the "For You / FYP" section of the app, which offers users a seductive mix of highly viral and shareable random short videos.​​​​

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