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北京要治痛风该挂什么科室
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发布时间: 2025-05-24 08:16:14北京青年报社官方账号
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  北京要治痛风该挂什么科室   

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

  北京要治痛风该挂什么科室   

ATLANTA — Leading congressional Democrats are reacting furiously to lightly-substantiated claims that immigrants held at a detention center in Georgia are undergoing questionable hysterectomies.In a complaint filed Monday, a nurse alleges that the Irwin County Detention Center performed questionable hysterectomies, refused to test detainees for COVID-19 and shredded medical records.Democrats seized on the most explosive allegations in her complaint, that a gynecologist called the “uterus collector” was performing “mass hysterectomies.”A top medical official with U.S. Immigration and Customs Enforcement released a statement “vehemently” disputing the claims, according to the Washington Post, saying only two women have been referred for hysterectomies from the facility since 2018.A follow-up news conference Tuesday in Atlanta provided little information to substantiate the claims. The nurse, Dawn Wooten, and her lawyers refused to release her full statement made to the Department of Homeland Security’s Inspector General. She also declined to take questions after making comments to the media.Wooten worked full-time as a licensed practical nurse at the immigration detention facility until July, when she was demoted. She had missed some work because she had coronavirus symptoms, according to NBC. Wooten says she was demoted because she asked her superiors about the lack of COVID-19 testing and PPE at the facility.The gynecologist is not named in Wooten’s whistleblower complaint. Multiple media outlets report women from the facility have been taken to a local doctor named Dr. Mahendra Amin.Scott Grubman, a lawyer for Amin, said in a statement to the Washington Post that he was confident the doctor would be cleared of any wrongdoing.“Dr. Amin is a highly respected physician who has dedicated his adult life to treating a high-risk, underserved population in rural Georgia,” Grubman said.Amin has previously been accused by state and federal authorities of falsely billing Medicare and Medicaid in an investigation that ultimately led to a 0,000 settlement in 2015, according to the Department of Justice.“If true, the appalling conditions described in the whistleblower complaint – including allegations of mass hysterectomies being performed on vulnerable immigrant women – are a staggering abuse of human rights,” House Speaker Nancy Pelosi, a California Democrat, said in a statement. 2422

  北京要治痛风该挂什么科室   

At least 2.4 million more Americans were impacted by an Equifax data breach that happened last year, though those customers had less data stolen.The Associated Press reported the newly announced customers had only their names and a partial driver's license number stolen. The original data breach involved 145.5 million Americans who had their Social Security numbers impacted.In the driver's license theft, the attackers were unable to get the state where the license was issued and the dates of issuance and expiration. 529

  

AUBURN HILLS, Mich. — Authorities in Michigan say two people broke into a shed under a billboard, hacked into a computer and put pornography on a digital billboard along I-75 over the weekend. 200

  

AUSTIN, Texas (AP) — Oscar-winning actor Matthew McConaughey will join the University of Texas as a professor who this fall will teach in the university's Department of Radio-Television-Film.McConaughey has been a visiting instructor at the flagship campus in Austin since 2015 and the university said in a statement Wednesday that the appointment recognizes his "outstanding work as a teacher and mentor."He will continue teaching a Script to Screen film production class for which he developed the course curriculum.The university says McConaughey is respected for his "willingness to work with students beyond the classroom."McConaughey earned a film degree from the school in 1993. He's appeared in more than 50 films, including "Dazed and Confused," ''The Wolf of Wall Street" and "Dallas Buyers Club," for which he won an Oscar and Golden Globe for his leading role. 880

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