梅州双腔减压人流的费用(梅州破腹产多久可以上环) (今日更新中)

According to a recent paper, the Earth is caught directly in the crosshairs of a cosmic hurricane.A swarm of nearly 100 stars, accompanied by an even greater amount of dark matter, is aimed directly at our stellar neighborhood and there's nothing we can do to stop it; in fact, the vanguard is already upon us. This sounds like a perfect summer blockbuster movie, starring The Rock and Chris Pratt, or maybe Scarlett Johansson and Charlize Theron.Except this is for real. But is it a danger? Well, actually, no. Not at all. But it's potentially incredibly fascinating, with lots of interesting scientific interconnections. So, what is really going on?The story starts last April, when the Gaia satellite announced the locations and trajectories of 2 billion stars in the vicinity of the Milky Way surrounding our sun. They released the data to the public.Scientists were then able to look at the data set to see if they could spot anything peculiar. In galaxies like the Milky Way, the most common behavior is that the stars orbit the center of the galaxy in a manner broadly similar to the planets orbiting our sun. However, there are some stars that exhibit unusual motion. About a year ago, astronomers identified some "stellar streams" passing through our celestial neighborhood.One of them, called S1 (for stream 1), consists of nearly 100 stars of similar age and composition, orbiting the Milky Way in a direction exactly opposite that of normal stars. It's kind of like a handful of cars driving the wrong way down the highway, except with a much greater distance between them and with no likelihood of a collision. These stars are spread out over a few thousand light years and they will pass through the solar system's neighborhood over the course of a few million years.Astronomers identified S1 as being part of the remnants of a dwarf galaxy that collided with the Milky Way and was consumed in an epic episode of cosmic cannibalism. Dwarf galaxies are very small, typically about 1% the mass of the Milky Way. They can orbit larger galaxies and collide with the bigger galaxy, adding their mass to the parent. This is what appears to have happened in the case of S1, although the process has taken probably a billion years.Dwarf galaxies often have a disproportionately large fraction of dark matter. Dark matter is a hypothetical and still-undiscovered form of matter that interacts only gravitationally. Scientists have proposed its existence to explain many astronomical mysteries, for example the observation that most galaxies rotate faster than can be explained by the known laws of physics and the stars and gas of which they are composed.While dark matter has not yet been observed, hypothesizing its existence is the simplest and most economical explanation for myriad astronomical mysteries. Averaged over the entire universe, dark matter is thought to be five times more prevalent than the ordinary mass of stars and gas and planets.In dwarf galaxies, the fraction of dark matter is often higher. In Fornax, a well-studied dwarf galaxy orbiting the Milky Way, researchers estimate that the dark matter is between 10 and 100 times greater than the mass found in its stars.If that number holds for S1, the dark matter of the S1 stream is passing through the Earth at a much higher velocity than the more ordinary dark matter that orbits the Milky Way -- about twice as fast. It is thought that S1 dark matter is flying through the solar system at a speed of about 550 km/s, or about 1.2 million mph. While these numbers are impressive, they are misleading. Dark matter, if it exists, is extremely diffuse and it will have no discernible effect on the solar system.Because dark matter hasn't been observed yet, these velocity numbers are speculative, although they are strongly supported by a very large body of evidence. However, the prospect of high velocity dark matter flying through the Earth has suggested an opportunity to detect it.In a paper in the prestigious journal Physical Review D, researcher Ciaran O'Hare and his collaborators calculated the possibilities of discovering dark matter using both existing and proposed dark matter detectors. They considered two varieties of dark matter particles: a very heavy kind called a WIMP (weakly interacting massive particle) and a very light kind called an axion. Because the ultimate nature of dark matter is not known, it is important to be open to all possibilities.They found that the detectors they evaluated could find WIMPs for certain ranges of the particle mass. However, when they looked at the axion possibility, it appeared the prospects were even better. Because of its light mass and the manner in which an axion would interact with the detector, the apparatus simply has a better chance of seeing the axion. (If axions exist, of course.)Experiments with names like ADMX, MADMAX and ABRACADABRA are able or will be able to search for the signatures of dark matter proposed in the recent paper. They consist of technologies that are designed to interact with axions in a strong magnetic field and convert them to ordinary microwaves or radio waves that can be easily detected.It's important to remember that the S1 stream poses no credible threat to the Earth and humanity. There is no need for an action hero to save us. However, the synergy of science is staggering. A careful catalog of nearby stars has opened the prospect of a better possibility of finding and identifying dark matter, which is one of the great unanswered mysteries of modern physics. It's an amazing time we live in, in which we can study such things.\ 5625

ALPINE, Calif. (KGTV) - An Alpine woman who tested positive for COVID-19 says her quarantine turned into a nightmare as a postal carrier delivered a package.This past weekend, Tamica got a COVID test after three co-workers tested positive. She also tested positive and remains asymptomatic."Since I got that Sunday, I've been quarantining at home," said Tamica.On Tuesday, past 1 p.m., as the mail truck pulled up to her apartment off Tavern Road, her two 80-lb. dogs ran to the front door and started barking. She says the door was open but the screen door was shut, as the postal carrier stood outside, at the door, with something in his hand."They were instantly pawing at their face and backed up, and acting weird ... jumping up and down and making a whining noise," said Tamica.Tamica believes the postal carrier had used his pepper spray. At that point, Tamica says the dogs jumped on the door and pushed it open. They ran out, and she ran after them. Tamica says the letter carrier sprayed toward one dog as it ran off, before turning to her other dog."I just jumped in front of my dog. He's wasn't doing anything. He wasn't barking. He was just sitting there .... He's a golden retriever and very friendly ... The postal carrier is spraying us, yelling and just spraying wildly," Tamica said.Tamica says that went on for about a minute, and it seemed liked forever."I was mad, scared, ready to cry … yelling at him to stop, stop, stop!" said Tamica.She says he finally did. Her dogs' eyes were left shut and stinging for hours. Her eyes were also ripe with pain. Tamica filed a complaint with the Postal Service."It's outrageous. This was not warranted at all," said Tamica.A different version of events has emerged from the postal carrier's statements.According to a USPS spokesperson, he claims he never sprayed through the screen door, didn't intend to pepper-spray Tamica, and only started spraying when both dogs were outside, lunging at him, to allow him to "leave the area."The spokesperson adds that based on the statements collected, they are standing by their postal carrier's version of events. They did apologize for Tamica getting pepper-sprayed in the incident.They also issued the following statement:"The Postal Service places the safety of its employees as a top priority. Letter carriers fearing for their safety due to a loose or unrestrained pet may stop delivery and ask homeowners to pick up their mail at the Post Office until the pet is restrained. In cases where a carrier sees a dog roaming and can’t discern where it resides, delivery could be interrupted to the entire neighborhood.In 2019, San Diego ranked #10 in the country for dog attacks on letter carriers. Dogs can be protective of their territory and may interpret the actions of letter carriers as a threat. Please take precautions when accepting mail in the presence of your pet. When a carrier comes to your home, keep your dog inside, away from the door in another room. Any dog can bite. Even the friendliest dog may bite when startled or surprised. If the dog is physically or mentally unhealthy, is in pain, feels threatened, or is protecting its food or a favorite toy, it can bite.The letter carriers at your local Post Office deliver every day. And if you are a dog owner, we need you to deliver for us, too. Keep your dog on a leash or away from the door, so that your letter carrier can safely deliver to your mailbox or porch, today and every day." 3464

After a slew of women came forward to accuse producer Harvey Weinstein and other notable figures in media of sexual harassment, CNN's Anthony Bourdain expressed regret for his participation in and validation of a culture he sees as similarly sexist: the restaurant industry.In an interview Thursday with Poppy Harlow on CNN's "New Day," Bourdain -- whose girlfriend, Asia Argento, is among Weinstein's accusers -- explained that he had "spent nearly 30 years in the restaurant industry, an industry and a culture that has been pervasively hostile to women." 565

After the rage and tears fans endured in the exhausting, exhilarating "Avengers: Infinity War," comic book movie fans need a good laugh. "Deadpool 2" provides just that.A blisteringly funny follow-up to the surprise 2016 smash, the sequel is a pure, unbridled expression of the comedic stylings of Ryan Reynolds, who had a hand in producing and writing. The fact that his expressions are covered up in a mask most of the time doesn't detract from his easygoing command. To watch the "Deadpool" films is to experience a comedic master at the height of his powers.Just as with the first movie, the humorous creativity is at play from the opening to closing credits, with dastardly joyous surprises popping out of every corner of the screen.WATCH: Deadpool dances in new Celine Dion music videoThere are so many references and fast-talking verbal gymnastics at play that you probably need to watch the movie multiple times to truly appreciate the intricacies and various levels on which the gags register. The movie gives the most to those who are obsessed with the comic book film culture to which the movie takes a satirical katana chops at Marvel, DC and even Reynolds himself to a pulp.As is the case with better comedies, the plot serves the humor, never detracting from the comedic momentum. The story is well-told enough to generate some semblance of an emotional core, but even that is mocked ferociously. Deadpool does show a bit of character development in this outing, showing a softer side when it comes to romantic love and fatherly guidance of young mutants. But at his core, Deadpool is still the death-dealing court jester that comic book fans have adored for decades.From the outset, the indestructible, motormouthed mercenary declares that despite the bombardment of dirty jokes, this is indeed a "family film," which itself is a joke that lays the groundwork for laughs to come later on. That's the genetic makeup of "Deadpool 2," which boasts mutant powers for eliciting abs-shredding laughter. If you can't handle dirty jokes, stay far, far away. But for everyone else, take a cannonball jump into this Deadpool. The water's fine.RATING: 4 stars out of 4.Phil Villarreal TwitterPhil Villarreal FacebookPhil Villarreal Amazon Author PagePhil Villarreal Rotten Tomatoes 2313

Along with the nation’s top Democrats, several celebrities are expected to appear during the virtual Democratic National Convention this week.Party leaders announced Monday that Eva Longoria, Tracee Ellis Ross, Kerry Washington, and Julia Louis-Dreyfus are among the stars who are set to speak during the convention.The DNC says Longoria, an actress known for her role on “Desperate Housewives,” will participate on Monday. The night’s theme is “We the People,” “bringing together many Americans who are rising up to unite our country and join Joe Biden in rebuilding the country and moving it forward.”Ellis Ross, an actress known from “Black-ish,” will participate Tuesday night with the theme “Leadership Matters,” “where the focus is on the leaders and the experts, the veterans and the activists, all those who seek to unite and not divide, and who step up—not back down—from a fight over what’s right.”Washington, an actress known for her role on “Scandal,” will participate Wednesday night, when viewers will hear from Democratic vice-presidential nominee Kamala Harris. The night’s theme will be “A More Perfect Union.”Louis-Dryfus, known from "Seinfeld" and "Veep," will participate in the final night of the convention, highlighting “America’s Promise.” Programming will culminate in Joe Biden’s acceptance speech, when he will present his vision for uniting America to move the nation forward.Organizers announced the musical lineup last week. Those performers include Leon Bridges, The Chicks, Common, Billie Eilish, Jennifer Hudson, John Legend, Billy Porter, Maggie Rogers, Prince Royce, Stephen Stills.The musical artists will be featured across all four nights of the DNC, from Monday, Aug. 17 to Thursday Aug. 20. The convention programming is set to air from 9 p.m. to 11 p.m. ET.President Donald Trump is attempting to counter the DNC with his own campaign events this week. First, speaking jobs and the economy in Minnesota on Monday, followed by similar remarks in Wisconsin later in the day. Both states are considered battleground states leading up to the presidential election. 2109

来源：资阳报