济南阳痿可能治好(济南怎样使龟头不太敏感) (今日更新中)

As health experts warn about rising coronavirus cases from spread at indoor gatherings, a new website backed by recent research is trying to help people understand just how many people in what size space is risky for infection. Which could come in handy as some people consider small holiday gatherings.It’s more risky to be in a small room compared to a large gym. If people are calm and quiet, it is safer than singing or exercising no matter how distant they are.Given these types of scenarios, and the “rapidly advancing science” of how COVID-19 droplets behave, scientists at the Massachusetts Institute of Technology created the COVID-19 Indoor Safety Guideline application.Here’s an example:An average suburban house that is 2,000 square feet, with 25 people inside wearing cotton masks and talking in a whisper, can reduce their risk of transmission by only staying inside for 4 hours.If those same 25 people, in the same house, are not wearing a mask and are talking normally, the length of time to reduce transmission drops to just 50 minutes.And if those 25 people, in the same house, are singing along to Christmas music, without masks on, that time to safely reduce COVID-19 transmission indoors drops even further to just 8 minutes.If the size of the gathering is only 5 people, and there is still singing, no mask wearing, and it’s still a 2,000 square foot house, it becomes unsafe after just 27 minutes.The MIT website offers users the ability to select room size, number of people and length of time, then using previous research and scientific knowledge of airborne viruses, it predicts the risk of the indoor event. Users can change elements of the situation, like room size, mask wearing, ventilation, etc.Click here to visit the Indoor Safety Guideline website.In a restaurant, to reduce transmission, 50 people without masks and talking normally should stay for only two hours. If the restaurant has 100 people, to reduce transmission risk, they should only remain inside for 64 minutes.The researchers note current general social distancing guidelines (remain 6 feet apart) suggest 138 people would reduce their risk in the same size of space for an indefinite amount of time.Another example, a Boeing 737, the researchers’ model predicts 100 people can be onboard a 737 wearing masks and still reduce their risk of transmission by staying onboard less than 6 hours.The CDC updated their guidance about COVID-19 this fall, acknowledging ongoing research that shows coronavirus droplets “can remain suspended for many minutes to hours (in the air) and travel far from the source on air currents.”The Centers for Disease Control and Prevention also says coronavirus droplets can remain even when an infected person has left the room and can travel farther than six feet. 2800

American broadcaster Hugh Downs has died at the age of 99. The Downs family says Hugh died peacefully on Wednesday at his Scottsdale, Arizona home and was surrounded by family. Downs was born in Akron, Ohio on February 14, 1921.He had a career which spanned more than 60 years. Notably, Downs was a co-host on NBC's Today from 1962-1971, later he hosted 20/20 on ABC from 1978-1999 and announced for Tonight Starring Jack Paar.He also hosted the game show Concentration from 1958-1969. This story originally reported by ABC15.com. 538

Andrew McCabe is describing his firing as part of President Donald Trump's "ongoing war" with the FBI and the special counsel investigation.Attorney General Jeff Sessions fired the former FBI deputy director Friday, two days before McCabe was set to retire, ending his two-decade career with the bureau."This attack on my credibility is one part of a larger effort not just to slander me personally, but to taint the FBI, law enforcement and intelligence professionals more generally," McCabe said in a statement after his firing."It is part of this administration's ongoing war on the FBI and the efforts of the special counsel investigation, which continue to this day. Their persistence in this campaign only highlights the importance of the Special Counsel's work," he added. 787

Apple is fighting to take back the classroom.The company revealed on Tuesday in Chicago what it believes is the future of education. CEO Tim Cook and his executive team took the stage at Lane Tech High School to discuss "creative new ideas for teachers and students."Apple showed off a new budget iPad specifically targeted toward students. The 9.7-inch device -- the same size as the traditional iPad -- will cost 9.The new iPad works with the Apple Pencil to support art projects — similar to what comes packaged with the higher-end iPad Pro tablet. Apple also teased software features such as smart annotations to help teachers mark up papers, and augmented reality support which will "enable new ways to learn."Alleged leaks of the upcoming iOS 12 software have shown a "ClassKit" platform for developers to create puzzles, tests and lesson plans for students. Augmented reality integration is a good bet, too.Apple's education business has had its ups and downs. iPads and Mac computers were once the primary devices used in American schools. But in recent years, Apple's dominance has slipped. Now, Google's budget-friendly Chromebook laptops occupy nearly 60% of all devices in the classroom, according to research firm Futuresource. Apple devices make up just 17% of the education marketshare.Perhaps it has learned from its mistakes. In 2015, a Los Angeles school district planned to give every student in the city an iPad with preloaded curriculums. Wired reported that the program, which was expected to become a billion deal, fell apart.After a volatile few years, Apple said in 2017 that iPad sales for the classroom ticked up 32% after dropping the price for its entry-level iPad to 9. Apple also made small tweaks to make it easier for students to share in the classroom, such as removing its Apple ID requirement.To get ahead of Apple's news, Google announced on Monday its first tablet running Chrome 10: Acer's Tab 10. At 9 — the same price as the cheapest iPad — Google and Acer hope to bring the flexibility and versatility of the Chrome operating system to an even more portable device.This is Apple's first education-focused keynote in six years — and its second ever. The company hosted a digital textbook launch in New York City in 2012.Chicago is a fitting backdrop for its latest event. The city is home to one of the largest school systems in the United States, and Apple expanded its "Everyone Can Code program" late last year to teach more students its Swift programming language.It's unlikely, however, that Apple will reveal details about its next generation iPhone on Tuesday. But with its annual World Wide Developer Conference only three months away, we may hear some subtle software teases of what will land on iOS and OS soon.  2788

An envelope containing ricin was recently sent to the White House, which has prompted an official investigation, sources told the New York Times and CNN.According to New York Times sources, the exact location of the origins of the letter is unknown, but believe to have been sent from Canada. Mail sent to the White House is screened off site before reaching the complex.According to the CDC, Ricin is a poison found naturally in castor beans.“If made into a partially purified material or refined into a terrorist or warfare agent, ricin could be used to expose people through the air, food, or water,” the CDC said, adding that there is no known antidote for ricin.The White House has been the target of ricin mailings in the past. In 2013, the FBI confirmed two letters were sent to the White House containing ricin. 827

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