济南乳牙模型(西藏手骨间肌模型) (今日更新中)

While many think of NASA as the government agency that sends scientists into space, some of NASA’s most important work frequently is used to help people on Earth.In recent months, NASA has used its extensive network of scientists and researchers to combat the coronavirus. And in short order, the agency provided patients and healthcare providers with tools that may have been used to save lives.This week, NASA outlined a number of innovations the agency developed to support the fight against the virus.NASA created an open source for N95 respirators so people can make their own masks by using 3D printers. N95 respirators are unique as they protect the wearer from the virus. NASA’s designs were engineered to meet or exceed standard N95 performance, can be used for different purposes, are compatible with commercially-available filters, and do not disrupt the supply chain.If you have access to a 3D printer, here is how to create an N95 respirator designed by NASA.In addition to NASA’s open-source N95 respirators, the team from Johnson Space Center developed and tested a sterilization protocol to combat a national shortage of N95 masks. This allows N95 respirators to be reused by healthcare providers.“I had a very deep and personal connection to the evaluation (of N95 masks), because my wife is a medical professional… on the frontlines, with only one mask allocated for her to use and re-use daily,” said NASA engineer and project lead Jeremy Jacobs. “She has been very concerned about cross contamination between patient-to-patient and to our family.”Among other innovations, NASA’s Jet Propulsion Laboratory in California designed a new high-pressure ventilator tailored specifically to treat COVID-19 patients. It was designed to treat patients who might not require a full-featured ventilator, keeping the nation’s limited supply of traditional ventilators available, NASA said.NASA’s Armstrong Flight Research Center in California joined several other agencies to create a helmet that functions like a continuous positive airway pressure, commonly known as CPAP, machine to force oxygen into a patient’s low-functioning lungs. 2156

While hundreds of families wait in agony to learn the fate of missing loved ones, officials gave a gut-wrenching forecast on the fate of California's Camp Fire:It's not even halfway done burning yet.Since the Camp Fire erupted 10 days ago in Butte County, it has killed 77 people, destroyed more than 9,700 homes and torched an area the size of Chicago.But the blaze probably won't be fully contained until November 30, according to Cal Fire, the state's forestry and fire protection agency."It is overwhelming, I don't have any word to describe it," Butte County Sheriff and Coroner Kory Honea said. "This is unprecedented. No one has had to deal with this magnitude that caused so much destruction and regrettably so much death."Meanwhile, displaced residents are in limbo. Many are in Chico, Butte County's most populous city, about 15 miles from ground zero of the disaster, the town of Paradise.Some evacuees are staying with friends and family. Others are in a tent city in a Walmart parking lot. On Sunday, those seeking a place to grieve trickled into the First Christian Church of Chico for a candlelight vigil.A sign in the church set an intention for the hourslong open memorial: "We will rise from the ashes."The Camp Fire is already the deadliest and most destructive wildfire in California history. And with 993 people still unaccounted for, officials fear the death toll could keep rising.Crews are combing the remnants of houses where all evidence of life has been wiped out by flames. Many of the searchers have lost their own homes and are looking for the remains of their neighbors.While the search for the dead and missing continues, thousands of firefighters are trying to control the blaze. As of late Sunday, the Camp Fire had seared 150,000 acres and was 65% contained. 1826

Winnie Madikizela-Mandela, the South African anti-apartheid activist and former wife of the late President Nelson Mandela, has died at the age of 81.The family said in a statement that she passed away at the Netcare Milpark Hospital in Johannesburg, South Africa after a long illness, for which she had been in and out of hospital since the start of the year. 367

With its low air pressure, Hurricane Michael unofficially sits as the third-strongest landfalling hurricane to strike the United States. Having such a tremendously low air pressure typically causes storms to have strong winds, and Michael was no exception. Hurricane Hunters from the Air Force and NOAA estimated Michael's lowest pressure was 919 MB at landfall. The only two hurricanes with a lower pressure at landfall to hit the United States were the Labor Day Hurricane of 1935 and Camille of 1969.Also based on estimates, Michael had top winds of 155 MPH, which is just below Category 5 status. Based on top winds speeds, Michael was tied for the sixth-strongest landfalling hurricane in US history, tied with Hurricane Maria in 2017 and "Guam" in 1900. In terms of air pressure, Michael was 1 MB stronger than Katrina in 2005 and Maria in 2017 at landfall, and 3 MBs stronger than Andrew of 1992. Michael's top winds at landfall were well ahead of Katrina's top winds at landfall of 130 MPH, on par with Maria's top winds at landfall of 155 MPH, but below Andrew's top winds of 165 MPH.But in the immediate aftermath of Andrew, it was declared a Category 4 hurricane at landfall. It was not until years later when the National Hurricane Center concluded that winds in Andrew were greater than 157 MPH, marking the only Category 5 hurricane to strike the US since Camille in 1969. Like Andrew, Michael continued to strengthen all the way until landfall. In just three days, the storm went from a tropical storm to a high-end Category 4 hurricane. Other reasons Micheal will be notable:- Michael was just the sixth hurricane of at least Category 4 strength to hit Florida since 1950.  1752

William Daniels, the actor who played Mr. Feeny on the 90s sitcom "Boy Meets World," scared off a would-be burglar at his home in Southern California on Saturday evening, ABC News confirmed. The 91-year-old reported to police that he scared off the burglar by turning on lights around 9:30 p.m. on Saturday. Police believe he was not specifically targeted. "Luckily, Mr. Daniels was able to frighten away the person and the Los Angeles Police Department quickly responded," Daniels' representative said in a statement to ABC. "[He and his wife] are both well. Mr. Daniels thanks all his fans for their concern."According to TMZ, an employee of home security company ADT was seen at Daniel's home. Daniels' acting career began in 1952 at the age of 25 after graduating from Northwestern University. Daniels reprised his character of George Feeny for several episodes of the "Boy Meets World" spinoff "Girl Meets World." 946

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