Pearson gold heist suspect arrested after flying into Toronto from India
Another suspect is in custody in connection with the gold heist at Toronto Pearson International Airport last year, police say.
Researchers from Rutgers University in New Jersey say smartphone sensor data combined with machine learning could detect whether someone is under the influence of marijuana.
The researchers set out to develop a proof-of-concept way to passively detect cannabis use as an alternative to existing detection measures, such as blood, urine or saliva tests. Their findings were published in September in the journal Drug and Alcohol Dependence.
"Adverse effects of acute cannabis intoxication have been reported by young adults, with associated consequences such as poor academic and work performance, and injuries and fatalities due to driving while 'high' on cannabis," the authors wrote in the study.
The authors conducted a study experiment involving 57 young adults who reported using cannabis at least twice a week. The participants were asked to complete three surveys a day over a 30-day period that asked how high they were feeling at a given time, as well as when they had last used cannabis and the quantity consumed. In total, the participants reported 451 episodes of cannabis use.
The participants were also asked to download an app that analyzed GPS data, phone logs, accelerometer data and other smartphone sensors and usage statistics.
When only looking at the time of day, the algorithm was able to accurately detect an episode of cannabis use with 60 per cent accuracy. The smartphone sensor data alone was also able to produce an accuracy rate of 67 per cent.
However, smartphone sensor data combined with time-of-day data resulted in an accuracy rate of 90 per cent.
“Using the sensors in a person’s phone, we might be able to detect when a person might be experiencing cannabis intoxication and deliver a brief intervention when and where it might have the most impact to reduce cannabis-related harm,” said corresponding author and Rutgers professor Tammy Chung in a news release.
The GPS data was the most important dataset when it came to detecting cannabis use. The researchers found that participants would tend to travel shorter distances while they were high. Accelerometer data was the second most important feature, as it can be used to measure body movements.
The researchers say this is the first study to look at how smartphone sensors could be used to detect cannabis intoxication.
Chung and her colleagues were also involved in a similar study from 2018 that investigated whether smartphone data could detect heavy drinking episodes. In that study, they found that an algorithm that measured smartphone-usage patterns, such as screen-on duration, typing speed and time of day, could detect heavy drinking episodes with 91 per cent accuracy.
Another suspect is in custody in connection with the gold heist at Toronto Pearson International Airport last year, police say.
Hailey and Justin Bieber are going to be parents. The couple announced the news on Thursday on Instagram, both sharing a video that showcases Hailey Bieber's growing belly.
A family of fifth generation farmers from Ituna, Sask. are trying to find answers after discovering several strange objects lying on their land.
A B.C. man has been convicted of assault with a weapon after using a skid-steer Bobcat to chase two homeless people from his lawn, injuring one of them in the process.
A Conservative government led by Pierre Poilievre would not legislate on, nor use the notwithstanding clause, on abortion, his office says, as anti-abortion protesters gather on Parliament Hill.
A southwestern Ontario woman has received an $8,400 bill from a hospital in Windsor, Ont., after she refused to put her mother in a nursing home she hated -- and she says she has no intention of paying it.
Miss Teen USA resigned Wednesday, sending further shock waves through the pageant community just days after Miss USA said she would relinquish her crown.
A grieving mother is speaking out after her 36-year-old son was shot and killed in North Preston, N.S., Wednesday night.
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.
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.
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.
The stakes have been set for a bet between Vancouver and Edmonton's mayors on who will win Round 2 of the Stanley Cup playoffs.
A grieving mother is hosting a helmet drive in the hopes of protecting children on Manitoba First Nations from a similar tragedy that killed her daughter.
A chicken farmer near Mattawa made an 'eggstraordinary' find Friday morning when she discovered one of her hens laid an egg close to three times the size of an average large chicken egg.
A P.E.I. lighthouse and a New Brunswick river are being honoured in a Canada Post series.
An Ontario man says he paid more than $7,700 for a luxury villa he found on a popular travel website -- but the listing was fake.