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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 Phoenix restaurant caught a woman posing as a high school cheer mom to pocket money.The employees at Fry Bread House were skeptical when a woman came in asking for donations.“She told us our manager had ordered us brownies and cookies for a donation,” said Chef Kris Harris. The woman said the money would go to the Xavier College Preparatory cheer squad.Fry Bread House employees called their owner. She spoke with the woman and quickly realized they were being scammed.The restaurant alerted Xavier officials, who had already received two other reports of this same behavior. “I guess she just looked like a normal woman trying to raise money for her kid,” Harris explained. “It kind of blows your mind. I guess everybody is trying to find a new way to get something.”Xavier officials confirmed the scam and want people to be aware. 874

A South Korean army soldier patrols at the Unification Bridge, which leads to the Panmunjom in the Demilitarized Zone in Paju, South Korea. Tuesday, June 16, 2020. North Korea blew up an inter-Korean liaison office building just inside its border in an act Tuesday that sharply raises tensions on the Korean Peninsula amid deadlocked nuclear diplomacy with the United States. (AP Photo/Ahn Young-joon) 410
A video appears to show a Westland Police Officer using a Taser on a man as he is holding his two-month-old baby. The incident happened on Friday night where neighbors were having a barbecue. Witnesses said police arrived because of a call about a fight. “We were just barbecuing, and we saw the cops come up,” neighbor Kelvin Williams said. “They came up and asked us who was fighting. We were like, ‘You got the wrong house.’”Williams said they didn’t understand what the officers meant. “At that point, my friend Ray got a little agitated like you’re coming over to my house, my property and you're asking me about something I don’t know about,” Williams said. According to witnesses, Ray Brown then began to argue with officers. Williams said that is when he decided to record video on his cell phone. In the video, officers told Brown was going to be arrested, then ordered Brown's son to be taken away from the scene. “That’s my child. He can be exactly where he’s at. Give me my child. Give me my child,” Brown said. Officers then crowd into Brown with a taser out. Nichole Skidmore, Brown’s girlfriend, and mother of two-month-old Christopher tried to take the baby.It appears in the video that Brown was still holding Christopher and in the process of passing him to Skidmore when officers deployed a Taser. “I had to catch the baby," Skidmore said. "I was in the street talking with the cops. I had to come over. The taser is on this side of him, and the baby is over here. As soon as they start tasing him the baby flew out of his hands and I had to grab him, or he would have fell.”Brown was arrested and placed in custody soon after that. According to a Facebook post by the Westland Police Community Partnership, Brown attempted to grab his child only after learning he would be arrested. The department says that officers chose to deploy a Taser due to the "close quarters," and that the child was also in the hands of the mother at the time the Taser was used.The Community Partnership also stated that a "thorough internal investigation" would be conducted. 2158
A small town in Canada's Saskatchewan province is in mourning Saturday after 15 people died when a bus carrying a junior hockey team collided with a tractor-trailer. At least 14 are being treated for injuries."This is a dark moment for our city, our community, our province," Humboldt Mayor Rob Muench said Saturday afternoon at a news conference. "There is no playbook on what to do in cases like this. 411
来源:资阳报