Home-made face masks may need at least two layers to stop Covid-19 spread: Study

News Network
July 24, 2020

Melbourne, Jul 24: Home-made cloth face masks may need a minimum of two layers, and preferably three, to prevent the dispersal of viral droplets associated with Covid-19, according to a study.

Researchers, including those from the University of New South Wales in Australia, noted that viral droplets are generated by those infected with the novel coronavirus when they cough, sneeze, or speak.

As face masks have been proven to protect healthy people from inhaling infectious droplets as well as reducing the spread from those who are already infected, several types of material have been suggested for these, but based on little or no evidence of how well they work, the scientists said.

In the current study, published in the journal Thorax, the researchers compared the effectiveness of single and double-layer cloth face coverings with a surgical face mask (Bao Thach) at reducing droplet spread.

They said the single layer covering was made from a folded piece of cotton T shirt and hair ties, and the double layer covering was made using the sew method described by the US Centers for Disease Control and Prevention (CDC).

The scientists used a tailored LED lighting system and a high-speed camera to film the dispersal of airborne droplets produced by a healthy person with no respiratory infection, during speaking, coughing, and sneezing while wearing each type of mask.

Their analysis showed that the surgical face mask was the most effective at reducing airborne droplet dispersal, although even a single layer cloth face covering reduced the droplet spread from speaking.

But the study noted that a double layer covering was better than a single layer in reducing the droplet spread from coughing and sneezing.

According to the researchers, the effectiveness of cloth face masks is dependent on the number of layers of the covering, the type of material used, design, fit as well as the frequency of washing.

Based on their observations, they said a home made cloth mask with at least two layers is preferable to a single layer mask.

"Guidelines on home-made cloth masks should stipulate multiple layers," the scientists said, adding that there is a need for more research to inform safer cloth mask design.

Comments

Add new comment

  • Coastaldigest.com reserves the right to delete or block any comments.
  • Coastaldigset.com is not responsible for its readers’ comments.
  • Comments that are abusive, incendiary or irrelevant are strictly prohibited.
  • Please use a genuine email ID and provide your name to avoid reject.
Agencies
September 17,2020

Mumbai, Sept 17: Equity indices snapped a two-session rising streak to close with sharp losses on Thursday, in lockstep with global markets which recoiled after sobering economic assessment by the US Federal Reserve.

A weakening rupee and lack of fresh buying triggers further weighed on market mood, traders said.

The 30-share BSE Sensex opened lower and stayed in the negative zone throughout the session. It finally finished at 38,979.85, down by 323 points or 0.82 per cent.

Similarly, the NSE Nifty shed 88.45 points or 0.76 per cent to close at 11,516.10.

Bajaj Finserv was the top laggard in the Sensex pack, slipping 2.23 per cent, followed by PowerGrid, L&T, TCS, ICICI Bank, Kotak Bank, Tata Steel and Bajaj Finance.

On the other hand, HCL Tech, Infosys and Maruti finished with gains of up to 2.36 per cent.

Global equities swooned after the US Federal Reserve did not unveil any additional stimulus measures at its policy meet, even though it hinted at the key interest rate staying close to zero at least through 2023.

Federal Reserve Chairman Jerome Powell also said the economic outlook is "highly uncertain", stoking fears of more pain in store for businesses.

"Indian markets reacted in sync with global markets, after the US Fed reserve failed to keep up with the expectations of the investors. In spite of pledging to keep interest rates low, markets were disappointed on the lack of further inputs or immediate stimulus measures.

"Continued border tensions with China also worried Indian markets. Markets are expected to remain uncertain and investors advised to remain cautious," said Vinod Nair, Head of Research at Geojit Financial Services.

BSE realty, metal, bankex, capital goods, finance, power and utilities indices dropped as much as 1.87 per cent, while healthcare, IT and teck closed in the green.

Broader BSE mid-cap and small-cap indices fell up to 0.53 per cent.

Shares of Happiest Minds Technologies made a stellar debut on the bourses, listing with a premium of over 111 per cent against its issue price of Rs 166. The stock finally finished at Rs 371, up 123.49 per cent over the issue price.

Bourses in Shanghai, Hong Kong, Seoul and Tokyo ended with significant losses.

Stock exchanges in Europe too opened on a negative note. M

Meanwhile, global oil benchmark Brent crude was trading 0.26 per cent lower at USD 42.11 per barrel.

The rupee depreciated 14 paise to close at 73.66 against the US dollar.

Comments

Add new comment

  • Coastaldigest.com reserves the right to delete or block any comments.
  • Coastaldigset.com is not responsible for its readers’ comments.
  • Comments that are abusive, incendiary or irrelevant are strictly prohibited.
  • Please use a genuine email ID and provide your name to avoid reject.
Agencies
September 14,2020

Bytedance, the Chinese owner of TikTok, has reportedly chosen Cloud major Oracle over Microsoft to run its US operations as a ‘trusted tech partner’, multiple media reports revealed on Monday while an official announcement was still awaited.

According to The New York Times, ByteDance rejected the acquisition offer from Microsoft. However, it was unclear whether TikTok's choice of Oracle as a technology partner would mean that "Oracle would also take a majority ownership stake of the social media app".

This is different from an outright sale and appears to suggest Oracle will help run TikTok's US operations with its Cloud technologies.

In an official statement, Microsoft said its bid for TikTok operations in the US was rejected.

"ByteDance let us know today they would not be selling TikTok's US operations to Microsoft. We are confident our proposal would have been good for TikTok's users, while protecting national security interests," Microsoft said.

"To do this, we would have made significant changes to ensure the service met the highest standards for security, privacy, online safety, and combating disinformation, and we made these principles clear in our August statement. We look forward to seeing how the service evolves in these important areas," the tech giant added.

ByteDance has reportedly decided not to sell or transfer the algorithm that is behind TikTok to any other company. This was reported by South China Morning Post quoting sources as saying that while ByteDance will not give its source code to any bidder in the US, its tech team can develop a new algorithm in the US. The company has reportedly informed the same to authorities and potential bidders in the US.

After TikTok was banned in India in June, along with 58 other Chinese apps, the Donald Trump administration in the US increased pressure on the ByteDance-owned platform to sell its US operations by mid-September or face a ban.

According to NYT, Oracle has cultivated close ties with the Trump administration.

"Its founder, Larry Ellison, hosted a fund-raiser for Trump this year, and its chief executive, Safra Catz, served on the president's transition team and has frequently visited the White House".

Trump said last month that he would support Oracle buying TikTok.

"I think that Oracle would be certainly somebody that could handle it," he told reporters. Trump maintained there will be "no extension of the TikTok deadline".

Riding on new customer wins in both Cloud applications and infrastructure businesses, Oracle posted better than expected results for its FY21 first quarter results last week, generating $9.4 billion in revenue which was up 2 per cent compared to the same period last year.

Meanwhile, China said the Trump administration's deadline for TikTok sale is tantamount to "coercive robbery".

"The tricks of economic bullying and political manipulation that the US played on non-American companies are tantamount to coercive robbery," said a Chinese Foreign Ministry spokesperson over the weekend.

Comments

Add new comment

  • Coastaldigest.com reserves the right to delete or block any comments.
  • Coastaldigset.com is not responsible for its readers’ comments.
  • Comments that are abusive, incendiary or irrelevant are strictly prohibited.
  • Please use a genuine email ID and provide your name to avoid reject.
Agencies
September 14,2020

Sensex-5.jpg

New Delhi, Sept 14: Domestic equity benchmark Sensex jumped over 300 points in early trade on Monday tracking gains in index majors Reliance Industries, HDFC twins and HCL Tech amid positive global cues and fresh foreign fund inflow. The 30-share BSE index was trading 340.10 points or 0.88 per cent higher at 39,194.65; while the NSE Nifty rose 89.15 points or 0.78 per cent to 11,553.60.

HCL Tech was the top gainer in the Sensex pack, surging around 5 per cent, followed by Tech Mahindra, HDFC duo, Reliance Industries, TCS, SBI and IndusInd Bank. On the other hand, HUL, Asian Paints, Maruti, Bajaj Auto and Nestle India were among the laggards.

In the previous session, Sensex ended 14.23 points or 0.04 per cent higher at 38,854.55, while the broader Nifty rose 15.20 points or 0.13 per cent to close at 11,464.45. Exchange data showed that foreign institutional investors bought equities worth Rs 1,175.81 crore on a net basis on Friday. Domestic equities opened on a positive note tracking positive cues from global markets and persistent foreign fund inflow, traders said.

Bourses in Shanghai, Hong Kong, Seoul and Tokyo were trading with gains in mid-day deals after Biopharmaceutical giant AstraZeneca and the University of Oxford on Saturday resumed trials for their coronavirus vaccine in the UK after the Medicines Health Regulatory Authority's approval. The human trials resumed days after a pause was announced in the trials after an adverse reaction in one of the participants. Meanwhile, global oil benchmark Brent crude was trading 0.35 per cent lower at USD 39.97 per barrel. 

Comments

Add new comment

  • Coastaldigest.com reserves the right to delete or block any comments.
  • Coastaldigset.com is not responsible for its readers’ comments.
  • Comments that are abusive, incendiary or irrelevant are strictly prohibited.
  • Please use a genuine email ID and provide your name to avoid reject.