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A subject coughing in a cyclic incident. Top view of airborne droplet transmission with and without wearing a surgical mask. The top and bottom figures show the results at 4 s and 5 s, respectively. We consider a surgical mask that exhibits an initial efficiency of ～91%. The cover does not prevent the transport of the saliva droplets entirely away from the subject. Many droplets penetrate the mask shield and some saliva droplet disease-carrier particles can travel more than 1.2 m. For visualization, the droplets were scaled by a factor of 600 compared to their actual size. The environmental conditions are zero wind speed, ambient temperature 20 °C, pressure 1 atm, and relative humidity 50%. The mouth temperature is 34 °C, and the face skin temperature is 32 °C. 779

A new spicy donut by Dunkin’ is sure to be hot. On Wednesday, Dunkin’ unveiled its latest creation - the Spicy Ghost Pepper Donut.The sweet treat is a yeast donut ring that's topped with a strawberry-flavored icing that features a blend of cayenne and ghost pepper and comes with red sanding sugar for a sizzling look.“Halloween looks a little different this year, and so do our donuts. While our classic bakery offering has plenty of crave-worthy treats, we’re excited to show our spicy side with a donut that packs a touch of heat with something sweet and can be enjoyed any time of day,” Jill Nelson, Vice President, Marketing Strategy at Dunkin’ said in the press release.The spicy ghost pepper donut is available beginning Wednesday until December for a limited time at participating locations. 807

A new study about video gamers pretty much shatters the stereotype many people have about them.Researchers at the Queensland University of Technology in Australia conducted what they say is the first study on body mass index from a worldwide sample of e-sports players. What they found surprised even them.“When we went into the study, we were kind of expecting that the gamers would have a much higher BMI than the general population, but what we found was the complete opposite. We found that players tended to have up to 21% more likelihood of being a normal weight,” said lead researcher Michael Trotter.The study included hundreds of participants from 65 countries. It showed gamers were between 9% and 21% more likely to be a healthy weight. Players also drank less and smoked less than the general population.Trotter started the university's e-sports program before he started studying for his PhD. He says he was surprised that serious players focused on their health almost as much as their playing. He says players requested a personal trainer, a dietician, and a sports psychologist.The study also found the healthier players were the better players.“We found that the players who were in the top 10% of all players and we measured up to 2.5 thousand players, it wasn't a small study. We found the top 10% of all players were exercising significantly more than their lower ranked counterparts,” said Trotter.Trotter says the growth of e-sports is huge and future programs will need to look at this study and realize they must focus on the health of players.He also says future research will need to be done on the overall health of e-sports players, such as muscle mass and bone density. 1706

A new US government report delivers a dire warning about climate change and its devastating impacts, saying the economy could lose hundreds of billions of dollars by the end of the century.The federally mandated study was supposed to come out in December but was released by the Trump administration on Friday, at a time when many Americans are on a long holiday weekend, distracted by family and shopping.David Easterling, director of the Technical Support Unit at the NOAA National Centers for Environmental Information, emphasized that there was "no external interference in the report's development." He added that the climate change the Earth is experiencing is unlike any other."The global average temperature is much higher and is rising more rapidly than anything modern civilization has experienced, and this warming trend can only be explained by human activities," Easterling said.Coming from the US Global Change Research Program, a team of 13 federal agencies, the Fourth National Climate Assessment was put together with the help of 1,000 people, including 300 leading scientists, roughly half from outside the government.It's the second of two volumes. The first, released in November 2017, concluded that there is "no convincing alternative explanation" for the changing climate other than "human activities, especially emissions of greenhouse gases."The report's findings run counter to President Donald Trump's consistent message that climate change is a hoax. On Wednesday, Trump tweeted, "Whatever happened to Global Warming?" as some Americans faced the coldest Thanksgiving in over a century.But the science explained in these and other federal government reports is clear: Climate change is not disproved by the extreme weather of one day or a week; it's demonstrated by long-term trends. Humans are living with the warmest temperatures in modern history. Even if the best-case scenario were to happen and greenhouse gas emissions were to drop to nothing, the world is on track to warm 1.1 degrees Fahrenheit.As of now, not a single G20 country is meeting climate targets, research shows.Without significant reductions in greenhouse emissions, the annual average global temperature could increase 9 degrees Fahrenheit (5 Celsius) or more by the end of this century, compared with preindustrial temperatures, the report says. 2355

A St. Louis couple who waved guns at peaceful protesters near their property earlier this year will speak in support of President Donald Trump next week at the Republican National Convention, The Washington Post, NPR and CNN report.The couple will reportedly deliver remarks remotely, as in-person portions of the convention have been canceled.Mark and Patricia McCloskey gained national attention in late June as Black Lives Matter protesters marched toward the home of St. Louis Mayor Lyda Krewson. Krewson and the McCloskeys live in a private, gated community.Though the protesters were peaceful and staying away from the McCloskey's mansion, the couple emerged from their homes with firearms and ordered protesters to leave.Various social media videos show Patricia McCloskey pointing a small handgun at protesters. Mark McCloskey carried a long gun.In July, the couple was charged with unlawful use of a weapon for waving the guns in a "threatening" manner. Both have maintained their innocence, saying they were afraid for their lives and were simply protecting themselves.The White House has previously expressed support for the couple. Press Secretary Kayleigh McEnany said in July that the charges against the McCloskeys were "absurd." Missouri Gov. Mike Parson has also said he's spoken with Trump about the situation.The RNC will take place next week between Aug. 24 and Aug. 27. 1398