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Washington, Jun 18: US Defence officials are concerned over China's use of COVID-19 situation to gain stakes in strategically important companies of United States as the impact of novel coronavirus has left several companies in dire need of capital.

Amid the pandemic, it getting hard for the defence department to keep an eye on national security and help protect smaller companies down the chain, CNN reported.

"We are paying close attention to any indicators that China is leveraging Covid-19 to take advantage of a situation where defence companies need capital more than ever," a defence official told CNN.

In April, Ellen Lord, undersecretary of defence for acquisition and sustainment said it is paying close attention to 'adversaries' against the 'economic warfare' with the United States.

"We have to be very, very careful about the focused efforts some of our adversaries have to really undergo sort of economic warfare with us, which has been going on for some time," Ellen Lord, undersecretary of defence for acquisition and sustainment was quoted as saying by CNN.

US Committee on Foreign Investment protects its interest against hostile countries gaining ownership in strategically important companies. But the pandemic is changing the definition of national security concerns to include drugs, protective gear and medical supplies.

"These are now national security needs and we probably should have been thinking about it a long time ago in terms of biowarfare that we should have a trusted industrial base or a set of trusted allies -- the UK, or NATO allies or Japan or Korea -- who are trusted in that regard," Bill Greenwalt, a former Pentagon official.

Give the threat posed by foreign acquisition, Pentagon has been offering tools to help small US businesses defend themselves against adversarial investment and conducting background checks with other government agencies to ensure transparency.

US President Donald Trump's trade adviser Peter Navarro recently told CNN if Trump wins reelection, Washington DC will likely take offshore supply chains as national security priorities.

"If we fail to do that in the face of this crisis, we will have failed this country and all future generations of Americans," Navarro said.

The US State Department has also warned US allies to "avoid economic overreliance on China" and "guard their critical infrastructure" from China's influence.

Chad P Bown, a senior fellow at the Peterson Institute for International Economics, pointed to recent China's economic coercion of Australia on the political matter saying, "this is how China operates and everybody knows it."

Feb 5: Pakistan will buy more palm oil from Malaysia, Prime Minister Imran Khan said on Tuesday, aiming to help offset lost sales after top buyer India put curbs on Malaysian imports last month amid a diplomatic row.

India imposed restrictions on refined palm oil imports and informally asked traders to stop buying from Malaysia, the world's biggest producer of the edible oil. Sources said the move was in retaliation for Malaysia's criticism of India's policy on Kashmir.

Malaysian Prime Minister Mahathir Mohamad said on Tuesday that he discussed palm oil with Khan who was on a visit to Malaysia and that Pakistan had indicated it would import more from Malaysia.

"That's right, especially since we noticed India threatened Malaysia for supporting the Kashmir cause, threatened to cut palm oil imports," Khan told a joint news conference, referring to India's Muslim-majority region of Kashmir.

"Pakistan will do its best to compensate for that."

India is a Hindu-majority country while Malaysia and Pakistan are mainly Muslim. India and Pakistan have been mostly hostile to each other since the partition of British India in 1947, and have fought two of their three wars over competing territorial claims in Kashmir.

Pakistan may have bought around 135,000 tonnes of Malaysian palm oil last month, a record high, India-based dealers who track such shipments told Reuters on condition of anonymity.

The figure is close to estimates of 141,500 tonnes from Refinitiv, which show sales to India in January may have plunged 80% from a year earlier to 40,400 tonnes.

Malaysia will release official export data on Monday.

Pakistan bought 1.1 million tonnes of palm oil from Malaysia last year, while India bought 4.4 million tonnes, according to the Malaysian Palm Oil Council.

Malaysian palm oil futures rose on Tuesday after Khan's comments and on expectations of a steep drop in production in January.

STRONG TIES

India has repeatedly objected to Mahathir speaking out against its move last year to strip Kashmir's autonomy and make it easier for non-Muslims from neighbouring Muslim-majority Bangladesh, Pakistan and Afghanistan to gain citizenship.

At the news conference, Mahathir did not refer to Kashmir but Khan did.

"The way you, PM, have stood with us and spoken about this injustice going on, on behalf of Pakistan I really want to thank you," Khan said.

He also said he was sad he had been unable to attend a summit of Muslim leaders in Malaysia in December. Saudi Arabia did not attend the summit, saying it was the wrong forum to discuss matters affecting the world's Muslims and Khan belatedly pulled out.

Some Pakistani officials, unnamed because they were not authorised to speak to the media, said at the time that Khan pulled out under pressure from Saudi Arabia, a close ally, although local media reported his officials denied that was the reason for his absence.

"Unfortunately our friends, who are very close to Pakistan as well, felt that somehow the conference was going to divide the ummah," Khan said, using the Arabic word for the Muslim community but not mentioning Saudi Arabia by name.

"It is clearly a misconception, as that was not the purpose of the conference."

London, May 20: The current physical distancing guidelines of 6 feet may be insufficient to prevent COVID-19 transmission, according to a study which says a mild cough in low wind speeds can propel saliva droplets by as much as 18 feet.

Researchers, including those from the University of Nicosia in Cyprus, said a good baseline for studying the airborne transmission of viruses, like the one behind the COVID-19 pandemic, is a deeper understanding of how particles travel through the air when people cough.

In the study, published in the journal Physics of Fluids, they said even with a slight breeze of about four kilometres per hour (kph), saliva travels 18 feet in 5 seconds.

"The droplet cloud will affect both adults and children of different heights," said study co-author Dimitris Drikakis from the University of Nicosia.

According to the scientists, shorter adults and children could be at higher risk if they are located within the trajectory of the saliva droplets.

They said saliva is a complex fluid, which travels suspended in a bulk of surrounding air released by a cough, adding that many factors affect how saliva droplets travel in the air.

These factors, the study noted, include the size and number of droplets, how they interact with one another and the surrounding air as they disperse and evaporate, how heat and mass are transferred, and the humidity and temperature of the surrounding air.

In the study, the scientists created a computer simulation to examine the state of every saliva droplet moving through the air in front of a coughing person.

The model considered the effects of humidity, dispersion force, interactions of molecules of saliva and air, and how the droplets change from liquid to vapour and evaporate, along with a grid representing the space in front of a coughing person.

Each grid, the scientists said, holds information about variables like pressure, fluid velocity, temperature, droplet mass, and droplet position.

The study analysed the fates of nearly 1,008 simulated saliva droplets, and solved as many as 3.7 million equations.

"The purpose of the mathematical modelling and simulation is to take into account all the real coupling or interaction mechanisms that may take place between the main bulk fluid flow and the saliva droplets, and between the saliva droplets themselves," explained Talib Dbouk, another co-author of the study.

However, the researchers added that further studies are needed to determine the effect of ground surface temperature on the behaviour of saliva in air.

They also believe that indoor environments, especially ones with air conditioning, may significantly affect the particle movement through air.

This work is important since it concerns safety distance guidelines, and advances the understanding of the transmission of airborne diseases, Drikakis said.