Air quality advisories issued in 5 provinces, 1 territory
Air quality advisories are in effect across Western Canada as smoky conditions plague some areas, according to the latest forecasts. Here's where.
The 3D mathematical model created by Nobel Prize-winning physicist Erwin Schrödinger, along with other researchers, and used for more than 100 years to describe how our eyes distinguish colours, has been found to have an important math error.
The finding was published in the journal The Proceedings of the National Academy of Sciences on April 29, following a study conducted at the U.S.-based Los Alamos National Laboratory that looked into the mathematics of colour perception.
“Our original idea was to develop algorithms to automatically improve colour maps for data visualization, to make them easier to understand and interpret,” Roxana Bujack, the paper’s lead author, said in a release.
But, the team ended up being the first to discover that the current mathematical model used for colour perception is incorrect.
“That model was suggested by Bernhard Riemann and developed by Hermann von Helmholtz and Erwin Schrödinger—all giants in mathematics and physics—and proving one of them wrong is pretty much the dream of a scientist,” Bujack said.
The researchers found that the universally-accepted hypothesis of perceived colour used Riemannian geometry, which “overestimates the perception of large colour differences,” and that using it leads to the distance between widely separated colours not adding up correctly.
This is because people perceive large colour differences as smaller than the total difference obtained by adding up little colour differences between two hues separate from one another, the study’s researchers said, concluding that “Riemannian geometry cannot account for this effect.”
Riemannian geometry describes a curved space in which straight lines are “geodesics,” and every pair of straight lines intersect.
“We didn’t expect this, and we don’t know the exact geometry of this new colour space yet,” Bujack said.
“We might be able to think of it normally but with an added dampening or weighing function that pulls long distances in, making them shorter. But we can’t prove it yet.”
The study’s findings will likely have implications for colour measurements now employed in paint and textile manufacturing, colour mapping, television, and image analysis, its researchers say.
Air quality advisories are in effect across Western Canada as smoky conditions plague some areas, according to the latest forecasts. Here's where.
After receiving a DNA kit one Christmas from his son-in-law, Hugh McCormick soon discovered that he had six unknown siblings, with whom he shared the same birth parents.
Four years on, the controversy over whether airlines owed refunds to passengers after cancelling hundreds of thousands of flights during the pandemic continues to simmer, aggravated by a sluggish, opaque complaints process.
Many foods fall under the category of ultraprocessed foods, depending on their exact ingredients. This type of food has been studied a lot lately, and the results aren’t great.
Dozens of Ontarians are expressing frustration in the province’s health-care system after their family doctors either dropped them as patients or threatened to after they sought urgent care elsewhere.
A new study projecting declining rates of cancer cases and deaths in Canada demonstrates the success of prevention and early detection programs, but also highlights areas where more work is needed to save and prolong lives, researchers say.
The star prosecution witness in Donald Trump's hush money trial is set to take the stand Monday with testimony that could help shape the outcome of the first criminal case against an American president.
Millions of Indians across 96 constituencies began casting their ballots on Monday as the country's gigantic, six-week-long election edges past its halfway mark. Prime Minister Narendra Modi is seeking a third straight term with an eye on winning a supermajority in Parliament.
An Ottawa pizzeria is being recognized as one of the top 20 deep-dish pizzas in the world.
English, history, entertainment, math and geography: high school trivia teams could be quizzed on any of it when they compete at the Reach for the Top Nationals in Ottawa in June.
An Ottawa pizzeria is being recognized as one of the top 20 deep-dish pizzas in the world.
A family of fifth generation farmers from Ituna, Sask. are trying to find answers after discovering several strange objects lying on their land.
A Listowel, Ont. man, drafted by the Hamilton Tigercats last week, is also getting looks from the NFL, despite only playing 27 games of football in his life.
The threat of zebra mussels has prompted the federal government to temporarily ban watercraft from a Manitoba lake popular with tourists.
A small Ajax dessert shop that recently received a glowing review from celebrity food critic Keith Lee is being forced to move after a zoning complaint was made following the social media influencer’s visit last month.
The Canada Science and Technology Museum is inviting visitors to explore their poop. A new exhibition opens at the Ottawa museum on Friday called, 'Oh Crap! Rethinking human waste.'
The Regina Police Service says it is the first in Saskatchewan and possibly Canada to implement new technology in its detention facility that will offer real-time monitoring of detainees’ vital health metrics.
Just as she had feared, a restaurant owner from eastern Quebec who visited Montreal had her SUV stolen, but says it was all thanks to the kindness of strangers on the internet — not the police — that she got it back.