濮阳东方医院男科治疗阳痿技术可靠(濮阳东方妇科几路车) (今日更新中)

BALDWIN PARK, Calif. - Arson officials in Los Angeles are investigating after someone set an official ballot drop box on fire Sunday night in Baldwin Park.The Baldwin Park Police Department said on Facebook that they and the Los Angeles County Fire Department responded to a ballot box on fire outside the Baldwin Park Library just before 8:30 p.m.According to police, ballots recovered from the box were turned over to the Los Angeles County Registrar's Office. 470

As the debate about mask mandates continues in some states, a new study reportedly shows social distancing is just as important to reduce the spread of COVID-19. The study looked at the effectiveness of face coverings when someone coughs repeatedly, coughing is one of the symptoms of COVID-19.The study was published in a June issue of “Physics of Fluid”, by AIP Publishing, and was conducted by Talib Dbouk and Dimitris Drikakis from the University of Nicosia in Cyprus.The researchers used computer modeling to show the range of saliva droplets when people cough. Previous work from this group showed saliva can travel about 18 feet when a person coughs and is not wearing a mask or covering their mouth.This new study built on that research to add in the variables of face coverings and repeated coughing. They used information available about filters used in surgical masks. 887

As the Democrats kicked off Night No. 1 of its four-night virtual national convention, George Floyd’s brother Philonise Floyd spoke out against his brother’s death.Philonise Floyd led the convention in a moment of silence in honor of his brother and others who have died as victims of "hate and injustice.""George should be alive today,” Philonise Floyd said. “Breonna Taylor should be alive today. Ahmaud Arbery should be alive today. Eric Garner should be alive today. Stephon Clark, Atatiana Jefferson, Sandra Bland—they should all be alive today. So it's up to us to carry on the fight."While most of those named by Philonise Floyd died while in police custody, Arbery was killed in a shooting by civilians. Three Georgia men, Travis McMichael, Gregory McMichael, and William "Roddie" Bryan were charged in connection with Arbery's death. His death came to light after it took 74 days before anyone was charged in connection with his death. Preceding Floyd at the virtual convention was Muriel Bowser, Washington D.C.’s Democratic mayor who called out President Donald Trump for using federal agents to deploy tear gas on a crowd of Black Lives Matter protests. During the height of the protests, federal agents used tear gas to disperse a crowd moments before Trump emerged from the White House to visit a burned out church across the street from the White House.“Where we were peacefully protesting, Donald Trump was plotting,” she said. “He stood in front of one of our most treasured houses of worship and held a Bible for a photo op. He sent troops in camouflage into our streets. He sent tear gas into the air—federal helicopters, too. I knew if he did this to D.C., he would do it to your city or your town.”During Bowser’s remarks, Trump’s campaign panned Bowser for saying she was “proud” of protesters. While Bowser wouldn’t initially commit to removing a “Defund the Police” mural from a D.C. street, city crews have since paved over the mural. 1967

As someone who once criticized President Barack Obama for offering public timelines on American military engagement overseas, US President Donald Trump may have backed himself into a corner following his own promise to respond, and respond harshly, to the deadly chemical attacks in Syria.Last week he declared he wanted to withdraw US troops from Syria as soon as possible. But the suspected use of chemical weapons in Syria over the weekend may force him to reevaluate the US mission in that country.Vowing on Monday to come to a decision "over the next 24 to 48 hours" on how to make Syria pay a "big price," Trump's White House now appears to be scrambling to match its policy to his words.Trump tweeted Wednesday that missiles "are coming" in response to a threat from Russia to shoot down missiles coming into Syria.  836

At 3 p.m. ET on Monday, November 26, a group of researchers will be really sweating. The NASA InSight spacecraft will try to land on Mars.After six months of flight, the lander component of the probe will detach itself from the cruise stage and head into the atmosphere. The lander component initially looks a fair bit like the re-entry capsule used in the 1960s and 1970s for the Apollo moon missions -- sort of conical, with a smooth and flat bottom. That bottom is a crucial heat shield that is designed to protect the probe as it passes through the thin Martian atmosphere.The landing is a devilishly difficult feat. The landing capsule has to batter its way through the atmosphere. It will fly through the Martian air at an initial speed of 12,300 mph, and it must hit the atmosphere at an angle of precisely 12 degrees. Any shallower, and the probe will bounce off into deep space. Any steeper, and the probe will burn itself up in a spectacular and fiery death. The probe will first touch the atmosphere six minutes and 45 seconds before landing. During this phase, it will experience acceleration 12 times that of the Earth's gravity. Were the probe a 150-pound human, during the flaming descent, it would weigh nearly a ton.About 3? minutes after the probe hits the atmosphere, a parachute will deploy, slowing down the probe even more. Fifteen seconds later, explosives will blow the heat shield off, exposing the actual InSight probe hidden inside. Ten seconds after the heat shield falls away, the probe will extend its legs, much like an airplane extends its wheels before touching down.The probe will fall for an additional two minutes attached to the parachute and protected by its conical shell. About 45 seconds before InSight lands, it will drop out of the shell and fall toward the surface. As soon as it leaves the shell, its landing rockets will ignite.The actual InSight probe looks a little bit like the Apollo moon lander, with three legs to support it and a boxy top. The rockets will slow it further and stop any remaining horizontal motion. Then, about 15 seconds before touchdown, the InSight probe will descend at a speed of 8 feet per second, before hopefully touching down gently on the Martian surface.The entire landing sequence will take about seven minutes to occur. A radio signal from Mars to Earth currently takes about eight minutes and seven seconds to get here. So the complete landing process will take place before we find out if it was successful. It will be done automatically, entirely by the probe itself. For the scientists and engineers who designed InSight, this is called "seven minutes of terror."And they are right to be worried. Mars is a graveyard of failed probes. There have been 44 attempts by various national space agencies to land on Mars. Eighteen have been successful. Twenty-three have not. Three have achieved orbit but failed at a landing.So, what does InSight hope to achieve? Well, as it happens, a lot. But it's different than the intrepid Curiosity probe, which NASA landed in 2012. InSight will not move around. Instead, it will stay put and tell us of the interior of Mars.One thing it will do is emit radio waves that we can monitor on Earth. By making careful measurements of how the frequency of the radio waves change, we will be able to measure the degree to which Mars wobbles as it rotates. That will tell us something about the core of the planet, specifically its makeup and information on the degree to which it is molten.InSight will also deploy a seismometer to listen for marsquakes (like earthquakes, but Martian-style) and for impacts of meteors on the planet. Information gleaned from the waves the seismometer detects will tell us more about the planet's interior.The third thing InSight will do is to dig below the planet's surface. Using a jackhammer, the probe will drill down 5 meters (16 feet) into the planet and, basically, it will take the planet's temperature.There are many reasons this is interesting. Taking the temperature at that depth will allow planetary scientists to determine how much heat is escaping from Mars. More broadly, this measurement will allow a clear determination of the temperature of the planet much closer to the core.This information will tell us a lot about how Mars formed, which, in turn, will add to the information of how rocky planets, including our own Earth, typically develop.And if you're more of an explorer kind of person and not so interested in Martian geology, it will also tell us how warm the planet is at modest depths, which will tell us if there is any chance of liquid water on the planet. Perhaps obviously, if the Martian subsurface is warm enough, any buried water will be in liquid form and not ice. Finding liquid water would be the key discovery that would make Martian exploration relatively easy. A relatively recent possible discovery of a buried Martian lake was promising, but the data was not conclusive. Knowing that the ground is warm would be very comforting to possible future explorers.Exploring the solar system is the first step toward exploring the stars. The InSight probe will give us --well -- insight into whether this is something that humanity will achieve in the foreseeable future.And maybe Elon Musk's bet on him getting to Mars will become true. 5329

来源：资阳报