Connect with us

Science

COVID-19: Alberta researcher recognized with innovation award for salt mask – Global News

Published

 on


Salt that crystallizes with sharp edges is the killer ingredient in the development of a reusable mask because any COVID-19 droplets that land on it would be quickly destroyed, says a researcher who is being recognized for her innovation.

Ilaria Rubino, a recent PhD graduate from the department of chemical and materials engineering at the University of Alberta, said a mostly salt and water solution that coats the first or middle layer of the mask would dissolve droplets before they can penetrate the face covering.

Read more:
CDC now says face masks can protect wearer from coronavirus

As the liquid from the droplets evaporates, the salt crystals grow back as spiky weapons, damaging the bacteria or virus within five minutes, Rubino said.

“We know that after the pathogens are collected in the mask, they can survive. Our goal was to develop a technology that is able to inactivate the pathogens upon contact so that we can make the mask as effective as possible.”

Story continues below advertisement

Rubino, who collaborated with a researcher at Georgia State University in Atlanta to advance the project she started five years ago, was recognized Tuesday with an innovation award from Mitacs. The Canadian not-for-profit organization receives funding from the federal government, most provinces and Yukon to honour researchers from academic institutions.






3:49
Edmonton Health Matters: salt solution and quilt delivery


Edmonton Health Matters: salt solution and quilt delivery – Dec 21, 2017

The reusable, non-washable mask is made of a type of polypropylene, a plastic used in surgical masks, and could be safely worn and handled multiple times without being decontaminated, Rubino said.

[ Sign up for our Health IQ newsletter for the latest coronavirus updates ]

The idea is to replace surgical masks often worn by health-care workers who must dispose of them in a few hours, she said, adding the technology could potentially be used for N-95 respirators.


Click to play video 'This is what makes a good face mask, according to experts'



0:49
This is what makes a good face mask, according to experts


This is what makes a good face mask, according to experts – May 21, 2020

The salt-coated mask is expected to be available commercially next year after regulatory approval. It could also be used to stop the spread of other infectious illnesses, such as influenza, Rubino said.

Story continues below advertisement

Dr. Catherine Clase, an epidemiologist and associate professor of medicine at McMaster University in Hamilton, said the “exciting” technology would have multiple benefits.

Clase, who is a member of the Centre of Excellence in Protective Equipment and Materials in the engineering department at McMaster, said there wasn’t much research in personal protective equipment when Rubino began her work.

“It’s going to decrease the footprint for making and distributing and then disposing of every mask,” she said, adding that the mask could also address any supply issues.

Read more:
Mask myths, debunked: No, wearing a mask won’t ‘shut down’ your immune system

The Public Health Agency of Canada recently recommended homemade masks consist of at least three layers, with a middle, removable layer constructed from a non-woven, washable polypropylene fabric to improve filtration.

Conor Ruzycki, an aerosol scientist in the University of Alberta’s mechanical engineering department, said Rubino’s innovation adds to more recent research on masks as COVID-19 cases rise and shortages of face coverings in the health-care system could again become a problem.

Ruzycki, who works in a lab to evaluate infiltration efficiencies of different materials for masks and respirators, is also a member of a physician-led Alberta group Masks4Canada, which is calling for stricter pandemic measures, including a provincewide policy on mandatory masks.

Advertisement

© 2020 Global News, a division of Corus Entertainment Inc.

Let’s block ads! (Why?)



Source link

Continue Reading

Science

Elon Musk Is Now Setting His Eyes On This Business – NDTV Profit

Published

 on



<!–

–>

Elon Musk is setting his sights on another business, telecommunications.

Elon Musk became the world’s richest person this month by upending the global auto industry and disrupting aerospace heavyweights with reusable rockets. Now he’s setting his sights on another business dominated by entrenched incumbents: telecommunications.

Musk’s Space Exploration Technologies Corp. has launched more than 1,000 satellites for its Starlink internet service and is signing up early customers in the U.S., U.K. and Canada. SpaceX has told investors that Starlink is angling for a piece of a $1 trillion market made up of in-flight internet, maritime services, demand in China and India — and rural customers such as Brian Rendel.

Rendel became a Starlink tester in November after struggling for years with sluggish internet speeds at his 160-acre farm overlooking Lake Superior in Michigan’s Upper Peninsula. After he paid about $500 for the equipment, FedEx arrived with a flat dish and antenna. For $99 a month, Rendel is now getting speeds of 100 megabytes per second for downloads and 15 to 20 for uploads — far faster, he says, than his previous internet provider.

“This is a game changer,” said Rendel, a mental health counselor, who can now easily watch movies and hold meetings with clients over Zoom. “It makes me feel like I’m part of civilization again.”

For months, SpaceX has been launching Starlink satellites on its Falcon 9 rockets in batches of 60 at a time, and the 17th Starlink launch was on Jan. 20. There are now roughly 960 functioning satellites in orbit, heralding an age of mega-constellations that have prompted worries about visual pollution for astronomers.

But the Starlink array in low-Earth orbit, closer to the planet than traditional satellites, is enough to enable SpaceX to roll out service along a wide swath of North America and the U.K. As SpaceX sends up more satellites, the coverage area will grow, expanding the potential customer base — and revenue stream — beyond the initial stages of today.

SpaceX didn’t respond to a request for comment.

“The big deal is that people are happy with the service and the economics of Starlink versus other alternatives,” said Luigi Peluso, managing director with Alvarez & Marsal, who follows the aerospace and defense industries. “SpaceX has demonstrated the viability of their solution.”

Last year, SpaceX Chief Operating Officer Gwynne Shotwell said that Starlink is a business that SpaceX– one of the most richly valued venture-backed companies in the U.S. — is likely to spin out and take public. That dangles the possibility of another Musk enterprise offering shares after last year’s sensational stock-market gains by Tesla Inc.

Starlink will face plenty of competition. While fiber optic cable is widely considered too expensive to lay down in remote regions and many rural locations, cellular connectivity is expected to make big advances with 5G and then 6G. Meanwhile, a number of innovative attempts to extend cellular to unserved areas are being developed by other well-heeled companies such as Facebook Inc.

“There will always be early Starlink adopters who think that anything from Elon Musk is cool,” said John Byrne, a telecom analyst at GlobalData. “But it’s hard to see the satellite trajectory keeping pace with the improvements coming with cellular.”

SpaceX, based in Hawthorne, California, is primarily known for launching rockets for global satellite operators, the U.S. military, and NASA. Last year, SpaceX made history by becoming the first private company to fly astronauts to the International Space Station.

Starlink marks SpaceX’s first foray into a truly consumer-facing product. Maintaining strong service while growing the customer base is something SpaceX has never tried before.

“Like any network, Starlink is going to enjoy rave reviews while it is underutilized,” said industry analyst Jim Patterson. “However, it will be challenged with the same congestion issues as their peers as they grow their base.”

Then again, SpaceX says the service will improve as it builds out more infrastructure.

“As we launch more satellites, install more ground stations and improve our networking software, data speed, latency and uptime will all improve dramatically,” Kate Tice, a senior engineer at SpaceX, said in a livestream of a Starlink mission in November.

Newsbeep

Fan Fervor

Starlink is gearing up for a big 2021, hiring software engineers, customer support managers, a director of sales, and a country launch manager.

The fan fervor that made Tesla cars such a hit with consumers and retail investors extends to Starlink. Facebook groups, Reddit threads and Twitter are filled with reports from early customers sharing images of their download speeds. You Tube has videos of people “unboxing” their Starlink dish and going through the initial set-up.

Ross Youngblood lives in Oregon and works remotely as an engineer for a tech company in San Jose. He owns a Tesla Model X and follows All Things Musk pretty closely. He got Starlink before Thanksgiving.

“I just plugged it all in and it started to work,” said Youngblood. “It’s going to be very disruptive, and I don’t think enough people are paying attention.”

Many other customers are waiting in the wings. In December, the Federal Communications Commission awarded SpaceX $885.5 million in subsidies as part of a wider effort to bring broadband to over 10 million Americans in rural areas. SpaceX will focus on 35 states, including Alabama, Idaho, Montana and Washington.

‘Aging Infrastructure’

“We can’t continue to throw money at aging infrastructure,” said Russ Elliot, director of the Washington State Broadband Office. “With Starlink, you can be anywhere. The cost to build in deep rural or costly areas is now less of an issue with this technology as an option.”

Early in the coronavirus pandemic, Elliot connected SpaceX with members of the Hoh Tribe in far western Washington. The Native American community had struggled for years to bring high-speed internet to their remote reservation, which spans about 1,000 acres and has 23 homes. Kids struggled to access remote learning, and internet connections were so slow that downloading homework could take all day.

“SpaceX came up and just catapulted us into the 21st century,” said Melvinjohn Ashue, a member of the Hoh Tribe, in a short video produced by the Washington State Department of Commerce.

In a phone interview, Ashue said that the first thing he did once he connected to Starlink was download a long movie: Jurassic Park. Now most of the reservation’s households have Starlink, making it possible for families to access not just online schooling but tele-health appointments and online meetings.

“Internet access is a utility. It’s no longer a luxury,” said Maria Lopez, the tribal vice chairwoman. Lopez said that Starlink was easy to hook up. The scariest part was climbing up a ladder to set up the dish on her roof.

“Every now and then it will glitch,” she said. “But it quickly reboots itself.”

–With assistance from Sanjit Das.

(Except for the headline, this story has not been edited by NDTV staff and is published from a syndicated feed.)

Let’s block ads! (Why?)



Source link

Continue Reading

Science

Canada is on the hunt for coronavirus variants — but may not be able to keep up with outbreaks – CBC.ca

Published

 on


This is an excerpt from Second Opinion, a weekly roundup of health and medical science news emailed to subscribers every Saturday morning. If you haven’t subscribed yet, you can do that by clicking here.


Canada is on the hunt for highly contagious strains of the coronavirus, but experts say they could already be spreading across the country and we may not be able to keep up with surveillance as more outbreaks occur.

Only five per cent of virus samples in Canada are tested for coronavirus variants, including those first identified in South Africa, Brazil and the U.K. — with the latter estimated to be at least 56 per cent more transmissible than the main coronavirus and potentially more deadly as well.

There have been at least 34 cases of variants confirmed in Canada in recent weeks, but several have no known link to travel and have prompted concerns the variants could be already driving outbreaks undetected.

“To ensure that virus variants that can spread more easily do not take hold, there is even greater urgency to suppress COVID-19 activity in Canada,” Chief Public Health Officer Dr. Theresa Tam said Wednesday.

First variant outbreak in Canada a ‘wake-up call’

Canada’s first outbreak due to a coronavirus variant was identified this week at the Roberta Place long-term care home in Barrie, Ont., where at least 81 staff and almost all 130 residents have been infected with COVID-19 since the outbreak was declared on Jan. 8, including 27 who have died.

Local public health officials suspected the outbreak was caused by the variant first identified in the U.K., also known as B117and sent samples to public health laboratories for further testing earlier this week.

Six preliminary samples have since tested positive for a variant, but it will take days to determine whether the outbreak was caused by B117 or a different strain. 

“Barrie has become ground zero for what is likely a [coronavirus] variant of concern, which has spread rapidly throughout Roberta Place and we are concerned that it will spread into our community and into other long-term and retirement homes,” said Dr. Charles Gardner, Simcoe Muskoka District Health Unit’s medical officer of health.

“This is a race against time and we need to use the COVID-19 vaccine as our most effective means to protect these residents. We have to do what we can to prevent other outbreaks.”

Local public health officials said Friday night they were accelerating the vaccine rollout in light of the outbreak and will begin vaccinating residents and staff at the long-term care home this weekend.

The Roberta Place long-term care home in Barrie, Ont., is facing Canada’s first outbreak where a coronavirus variant was detected. (Evan Mitsui/CBC)

Prof. Robyn Lee, a genomic epidemiologist at the University of Toronto’s Dalla Lana School of Public Health, said the situation at Roberta Place should be “another wake-up call that we really need to be doing something to stop transmission in the community and to test people to make sure that this doesn’t come into long-term care facilities.” 

Lee is awaiting the full results from the Public Health Ontario laboratory to see which variant specifically was spreading at Roberta Place, but says it’s likely we’ll see more outbreaks across Canada in the near future. 

“These variants appear to be more transmissible, which means we’re going to see more cases — especially if they do kind of kick off,” she said.

Lee says Canada needs to “very seriously crack down” with public health measures and speed up vaccination rollouts across the country in response to the threat posed by variants.

A visitor talks to a resident through a window of the Roberta Place long-term care home on Monday. (Evan Mitsui/CBC)

“What we’re seeing in Roberta Place is what happens when these get in and how aggressive they can be,” said Dr. Zain Chagla, an infectious diseases physician at St. Joseph’s Healthcare Hamilton and an associate professor at McMaster University.

“The whole concern about this variant is it getting into care facilities and places with vulnerable people — and it did exactly that.” 

Chagla said the Roberta Place outbreak has also raised concerns that variants could be the driving factor behind other recent COVID-19 outbreaks in Canada with unusually high numbers of cases in a short period of time. 

“There certainly is a worry that some of those were actually related to coronavirus variants,” he said.

“There’s probably a bigger burden out there.”

‘Detective work’ identifying variants is slow

Testing for the variants is done through a time-consuming process called genomic sequencing, which requires highly specialized staff and equipment and takes days to return results — precious time when variants could spread more widely. 

“We need to increase our surveillance of the virus in Canada,” said Art Poon, an associate professor in the department of pathology and laboratory medicine at Western University in London, Ont.

“We need the resources to do more sequencing so that we have better capability of tracking the spread of not only variants of concern, but other variants that may be arising in Canada.” 

Catalina Lopez-Correa, executive director of the Canadian COVID Genomics Network (CanCOGen), which was formed in April 2020 to track variants and co-ordinate viral genome sequencing across Canada, said that while the number of samples tested in Canada is low, the testing efforts are focused on very specific samples. 

“It’s not about the numbers, it’s about the strategy,” she said. “It’s about prioritizing the right samples and co-ordinating efforts.” 

Lopez-Correa said CanCOGen’s strategy for testing for variants in Canada includes targeting fast-spreading outbreaks; geographic regions with an unusually high growth in cases; younger patients with very severe disease; reinfections; and those infected after being vaccinated.

There are currently eight labs across Canada testing virus samples for the variants, including the National Microbiology Lab in Winnipeg and seven other provincial labs. 

“Some people are calling us genomic detectives and that’s exactly what we are,” said Lopez-Correa. “It’s detective work trying to figure out where those variants are and how to trace them.” 

But although scientists are working around the clock to test the samples, they can only move as fast as the results will allow — meaning scaling up surveillance in the face of faster spreading variants isn’t easy. 

WATCH | Coronavirus variant first detected in U.K. may have higher death risk: Boris Johnson

While saying the variant of the coronavirus first detected in the U.K. may be associated with a higher degree of mortality, British Prime Minister Boris Johnson said it’s also putting additional pressure on the nation’s health-care system. 1:42

“If you have a contained outbreak in a specific geographical region, you don’t need to sequence everybody that’s infected in that outbreak, because most of them will have the same variant of the virus,” Lopez-Correa said. “But, of course, it’s a challenge to increase the amount of samples we’re doing.” 

CanCOGen was created with initial federal funding of $40 million, half of which was allocated specifically for sequencing the virus, but Lopez-Correa said Canada could divert more money to staff and resources to test for the variants faster.

Lee said even with increased funding there is only a certain amount of surveillance Canada can reasonably do, given that the labs work on samples for all kinds of different viruses across the country. 

“Ideally, we would be sequencing more, and I know there are efforts to do this, but there are some limitations,” she said, including the time it takes to collect samples, transport them to specific labs, sequence them and analyze the results. 

“That involves a lot of different people and a lot of different resources. So, while it would be great to keep scaling up, there are going to be limits on what can be done.” 

Canada ‘way behind’ on sharing data on variants

The World Health Organization called on countries around the world to increase their capacity to test for variants earlier this month, but also underscored the need to share the data internationally. 

Poon said Canada is “way behind” in sharing data on variants around the world, partly because our public health system is understaffed and doesn’t currently have the resources to keep up with genomic surveillance.

“We are conservative about data sharing … I think that concerns about privacy have overridden calls to share data with other countries,” he said.

“Since this is a global pandemic, getting a clear picture of what’s going on requires open sharing of data between countries. But that’s not something that’s been happening with Canada.” 

Lopez-Correa said Canada could improve its capacity to share data across the country and internationally. She said data is first shared domestically before being sent overseas.

“We could do better, but we’re submitting the data,” she said. “If you look at regions like Africa, Latin America, they’re not generating that data. They don’t have the capacity.” 

Without effective international sharing of data, Canada could continue to see new variants arise in the future that are only identified after they’ve spread around the world. 

WATCH | Vaccinations a race against coronavirus variants: 

New coronavirus variants are increasing the pressure to get more people vaccinated before the variants derail those efforts and vaccines need to be retooled. 2:01

In the meantime, Lee said, the emergence of variants in Canada further underscores the need to vaccinate those most at risk of severe illness and death as soon as possible.

“Vaccination is going to play a critical role in this. We need to get everyone vaccinated who is in those long-term care facilities and all of the staff as well as their primary caregivers,” she said.

“I think that has to be the No. 1 priority at the moment.” 


To read the entire Second Opinion newsletter every Saturday morning, subscribe by clicking here.

Let’s block ads! (Why?)



Source link

Continue Reading

Science

Building Earth's largest telescope on the far side of the moon – CBC.ca

Published

 on


NASA engineers are studying the feasibility of building a massive, kilometre-wide radio telescope on the moon that would dwarf anything we could build on Earth.

The telescope, which would be constructed by robots, would take the form of a huge, wire-mesh antenna in a dish shape that would hang suspended in a three-kilometre-wide crater on the far side of the moon. 

The Lunar Crater Radio Telescope would provide a unique perspective on the early universe, though it likely won’t be built for decades, according to NASA robotics engineer Saptarshi Bandyopadhyay, who is leading the project.

“We all want to know what happened. How did the universe evolve? What happened after the Big Bang?” Bandyopadhyay told Quirks & Quarks host Bob McDonald.

In the 14 billion years since that event, the light waves from that era have been stretched out from tiny fractions of a millimetre to more than 10 metres as the universe expanded. They’re now extremely long radio waves, and those can’t be seen on Earth “because the ionosphere absorbs it,” said Bandyopadhyay.

“So we want to go somewhere away from [Earth] so that we can get a picture of the Big Bang and evolution of the universe.”  

Telescope size presents challenges

The problem, however, is that in order to capture those wavelengths, not only does this telescope need to be on the moon, it needs to be very large, which makes it hard to build.

There are giant radio telescopes on Earth, which observe shorter radio wavelengths that do penetrate the atmosphere. The 300-metre-wide Arecibo telescope in Puerto Rico — recently demolished in a catastrophic accident — or the 500-metre-wide FAST telescope in China represent significant engineering challenges.

Deployment of the Lunar Crater Radio Telescope would be done by robotic rovers, that would unfold the massive aluminum-mesh antenna. (Saptarshi Bandyopadhyay)

Standalone, self-supporting, dish-shaped radio telescopes can only get to a certain size, based on the strength of the materials they’re made from and the need to resist wind loads. To avoid these issues, the largest radio telescopes are built into natural features in the terrain. Arecibo and FAST, for example, were built in natural, dish-shaped sinkholes. 

Building such a telescope on the moon is, in one sense, easier. The lower gravity on the moon means a larger structure can be built with lighter materials. No atmosphere means no windstorms or other earthly environmental risks, though there are challenges from the moon’s harsh temperatures.  

According to Bandyopadhyay, the moon also has no shortage of appropriately shaped terrain structures in the form of ubiquitous impact craters. 

“These craters seem like natural places to put this dish-shaped telescope because the crater also looks like a bowl.”  

To find a crater candidate, Bandyopadhyay and his team combed over detailed pictures taken by NASA’s Lunar Reconnaissance Orbiter and discovered more than 80,000 suitable craters on the far side of the moon.

Origami-inspired transport and construction 

While the location would provide advantages, there are unique and significant challenges to building on the moon, in particular the harsh working conditions and the difficulty of transporting materials.  

The team studied a range of scenarios for how a telescope might be constructed and transported to the moon. The one they have arrived at is inspired by Japanese paper folding, said Bandyopadhyay.

“Origami is the art of folding paper into smaller and more interesting designs. But in space, origami is extensively used to take these large structures, like a large dish of one kilometre, and we can literally fold it multiple times and make it into a pretty small structure.”

The Lunar Crater Radio Telescope would be sensitive to frequencies that are blocked by Earth’s ionosphere, and would also be shielded from radio noise from Earth broadcasts. (Saptarshi Bandyopadhyay)

The antenna would be built on Earth in the form of a large, but extremely lightweight net-like structure made of conductive aluminum wire. It would be carefully folded into a package that would fit inside the nose cone of a large rocket, possibly the Space Launch System that NASA is currently developing.

Once launched, the antenna would be carried to the moon and land on the floor of the crater into which it would be installed. Then it would need to be deployed.  

“We will have these robots that will go down … to the lander and then pull lift wires that will connect to the lander sitting at the crater floor,” Bandyopadhyay said.

These lift wires would be anchored on the crater rim and as they are winched up, the antenna would unfold and deploy. Ultimately the net-like antenna would be suspended over the crater floor, looking a little like a dish-shaped spider web.  

The tension in the wires would be adjusted to result in the appropriate dish shape to receive radio signals from space and reflect them to a receiver.

All of this technology (the launch rocket possibly excepted) is available today, said Bandyopadhyay.  

The robots, for example, are currently being tested at NASA’s Jet Propulsion Laboratory.  

“These robots are called DuAxel, and they are actively being built at JPL for over a decade now. And these robots have the speciality that they can go down almost steep terrain like just cliff faces.”

[embedded content]

For now, this is an early stage engineering feasibility study, rather than a fully developed mission proposal, but Bandyopadhyay suggests it would certainly be expensive and would be a very high-profile endeavour for NASA.  

“Cost is a big uncertainty right now. Right now, all I can say is we think this will be a flagship-class mission.”

Given that, it’s likely decades away, at least. 

“Space is hard,” said Bandyopadhyay. “I would be surprised if I could see this launched and deployed before I retired, and I’m a young scientist.”

Written and produced by Jim Lebans

Let’s block ads! (Why?)



Source link

Continue Reading

Trending