武清区龙济医院切除包皮多少钱(天津天津武清龙济) (今日更新中)

NASHVILLE — As a teacher working two jobs, Blake Hastings often finds herself scraping to get by and waiting for pay day to come, which is why earlier this week when she was about to run out of gas in Spring Hill, Tennessee, she knew she couldn’t afford to fill her entire tank.Hastings is a special education teacher who is passionate and still working on her master’s degree at Middle Tennessee State University. Her soft smile and long blonde hair seem to mirror her warm personality.This is perhaps what drew the attention of a stranger at the Kroger in Spring Hill on Tuesday night. Hastings had just left her second job as a nanny and was heading home when her gas light turned on — the tank was empty. So she pulled into the gas station here with only a few dollars for gas. Payday was still a few days away so this would have to do for now.But as she got out of her car, a stranger approached her. 938

NASA's OSIRIS-REx mission and the asteroid Bennu have had a date planned for two years, and just after noon ET today, they finally got to meet face to face. OSIRIS-REx fired its thrusters for a small burn, putting it about 4.3 miles from Bennu, marking the end of its journey to the asteroid.The mission -- which stands for Origins, Spectral Interpretation, Resource Identification, Security-Regolith Explorer -- is NASA's first asteroid sample return mission. It launched in September 2016 and will spend two years up close and personal with Bennu. First images of the asteroid from the spacecraft's perspective have appeared as it got closer and closer.On Tuesday, the spacecraft will fly within 5 miles of Bennu, which will help design future orbits and map the surface.Over the next year, OSIRIS-REx will survey the asteroid using five scientific instruments on board the spacecraft. These instruments will help it determine a safe location from which to collect a small sample from Bennu's surface that will be returned to Earth in September 2023."Bennu's low gravity provides a unique challenge for the mission," said Rich Burns, OSIRIS-REx project manager at NASA's Goddard Space Flight Center. "At roughly 0.3 mile in diameter, Bennu will be the smallest object that any spacecraft has ever orbited."The sample from Bennu, a near-Earth asteroid, could help scientists understand not only more about asteroids that could impact Earth but about how planets formed and life began.OSIRIS-REx has a camera suite, a laser altimeter for 3D mapping, a thermal emission spectrometer to take temperature and mineral content and spectrometers to measure X-rays, nearly infrared and visible light.An arm mechanism called TAGSAM will reach out to collect the sample from Bennu's surface, making contact with the asteroid for five seconds in July 2020. During this contact, the arm will use a nitrogen gas burst to stir up rock and other materials on the surface so it can capture them. There is enough nitrogen for three attempts if the first is unsuccessful.NASA said the estimated 2.1-ounce sample size equates to about 30 sugar packets worth of dirt and rocks.The arm has a full range of motion, with joints capable of movement comparable to shoulder, elbow and wrist joints. It was "flexed" in space for the first time on November 14."The TAGSAM exercise is an important milestone, as the prime objective of the OSIRIS-REx mission is to return a sample of Bennu to Earth," said Dante Lauretta, OSIRIS-REx principal investigator at the University of Arizona, Tucson. "This successful test shows that, when the time comes, TAGSAM is ready to reach out and tag the asteroid."In 2021, it will be time for the spacecraft to essentially turn around and begin its two-year journey home. The sample will be packed into a capsule that will drop in the Utah desert in 2023.For two years after the return, the sample will be cataloged and analyzed. Afterward, 75% of the returned sample will remain at NASA's Johnson Space Flight Center so it can be used for more research by scientists from around the world.Why did NASA select Bennu out of the 780,000 known asteroids in our solar system?It was discovered in 1999, and scientists have been studying it ever since. The asteroid fits a number of criteria that make it intriguing and convenient.Bennu is relatively close to Earth, and its orbit even crosses that of our planet, making a close approach every six years. Though small asteroids can rotate very quickly, Bennu has a diameter just a bit bigger than the height of the Empire State Building and rotates relatively slowly, each 4.3 hours. This means OSIRIS-REx can match its velocity and touch down briefly.The asteroid could pass close to Earth, closer than the moon, in 2135, with even closer approaches possible in 2175 and 2195. A direct hit is unlikely, but the data gathered during this mission can help determine the best ways to deflect near-Earth asteroids.The asteroid is also old and well-preserved, full of valuable materials that may even contain clues about how life began. Bennu is essentially a leftover from the formation of our solar system billions of years ago, although some of the minerals inside it could be even older.This carbon-rich asteroid could be full of organic molecules, metals, platinum and even water -- the essential ingredients for life. It's because of objects like Bennu that these resources were delivered to Earth during its formation.Asteroids could even serve as fuel stations for robotic and human missions if we can unlock the hydrogen and oxygen inside them, NASA said.Bennu probably broke off of a larger asteroid in the asteroid belt between Mars and Jupiter a couple billion years ago. This knocked it through space until an orbit close to Earth locked it in place. And Bennu is believed to be a grouping of rocks held together by gravity rather than a single object.But its orbit drifts 0.18 miles each year toward the sun, and OSIRIS-REx will enable researchers to understand why and to predict Bennu's movements. This could also explain how it ended up as a near-Earth asteroid."The story of this asteroid is the story of the solar system," said Bashar Rizk, instrument scientist for OSIRIS-REx. "When we understand Bennu, we will understand something fundamental about our solar system."The-CNN-Wire 5356

Mosquitos are known for spreading a number of infectious diseases through their bites. But a trial set to begin in 2021 hopes to slow the spread of these diseases, such as West Nile and Zika.A plan approved for the Florida Keys will release millions of genetically modified mosquitoes, known as Aedes aegypti, in hopes of reducing the number of bites. The genetically modified mosquitoes are all males, which, unlike female mosquitoes, do not bite humans.The trial is being conducted by Oxitec, which is based in the UK. Earlier in 2020, the EPA gave Oxitec approval to move forward with the trial.“To meet today’s public health challenges head-on, the nation needs to facilitate innovation and advance the science around new tools and approaches to better protect the health of all Americans,” the EPA said earlier this year. “After all appropriate approvals are garnered, EPA looks forward to receiving field test results regarding the effectiveness of this promising new tool that could help combat the spread of mosquito-borne diseases like the Zika virus.The Florida Keys Mosquito Control District say that the male mosquitoes have been genetically modified to only provide live male offspring when mating with a female.The experimental use permit begins in 2021, and the trial must conclude by 2022.Some environmental groups and residents have expressed opposition to the plan. A group opposing the plan said that 2,000 letters were sent to officials requesting the plan be put on hold.Some are concerned that timing of the trial during a pandemic is not a good policy."The release of genetically engineered mosquitoes will needlessly put Floridians, the environment and endangered species at risk in the midst of a pandemic," said Dana Perls, food and technology Program Manager at Friends of the Earth. "This approval is about maximizing Oxitec's profits, not about the pressing need to address mosquito-borne diseases."Others say the plan is ‘risky.’"The Mosquito Control Board has an obligation to our community, not a vendor that's products are risky and untrustworthy. FKMCD wants to proceed with an experiment that may be damaging to public and environmental health and our local economy," said Barry Wray, Executive Director of the Florida Keys Environmental Coalition. "We need true solutions to benefit our community and ecosystems."The mosquito control board responded that mosquitoes developing a higher tolerance for pesticides, and more actions are needed to control the population."Any approved tools that show promise in helping control this dangerous mosquito are worth examining to the fullest extent,” Andrea Leal, Executive Director of the Florida Keys Mosquito Control District, said. “We look forward to working with Oxitec and carrying out this trial as it has the potential to increase effective mosquito control in the rest of the United States." 2885

Mississippi Sen. Cindy Hyde-Smith posed with Confederate artifacts in photos from 2014 that emerged Tuesday, the latest in a series of controversial moments for the freshman Republican senator who is facing a run-off next week.In a photo posted to her Facebook account in 2014, Hyde-Smith was pictured posing with Confederate artifacts. The caption on the post read, "Mississippi history at its best!"Hyde-Smith, who will face former Democratic Rep. Mike Espy in a Nov. 27 runoff election, posted the caption after touring Beauvoir, the home and library of Confederate President Jefferson Davis. In the post, Hyde-Smith appears in four photos posing with Confederate rifles, soldiers' hats and documents."I enjoyed my tour of Beauvoir. The Jefferson Davis Home and Presidential Library located in Biloxi," she wrote in the post on her Facebook page. "This is a must see. Currently on display are artifacts connected to the daily life of the Confederate Soldier including weapons. Mississippi history at its best!"Mississippi was one of the southern states that seceded from the United States prior to the Civil War to form the Confederate States of America.The photo and the caption referencing Mississippi's period in the Confederacy is another flashpoint for Hyde-Smith in the weeks leading up to her runoff election against Espy, who is black and would be the first African-American senator from Mississippi since Reconstruction. Hyde-Smith was appointed to the Senate earlier this year to replace Thad Cochran, who retired for health reasons.At the time of the photo was taken, Hyde-Smith was the Mississippi Commissioner of Agriculture and Commerce.The campaigns of Hyde-Smith and Espy did not immediately return a request for comment. The two will debate at 8 pm ET Tuesday.In a video clip posted Thursday, Hyde-Smith said that making it "just a little more difficult" for some university students to vote was "a great idea.""And then they remind me that there's a lot of liberal folks in those other schools who maybe we don't want to vote. Maybe we want to make it just a little more difficult. And I think that's a great idea," Hyde-Smith says in the video.Hyde-Smith campaign spokeswoman Melissa Scallan said at the time, "Obviously Sen. Hyde-Smith was making a joke and clearly the video was selectively edited." The video includes no further context.In another video posted earlier this month, Hyde-Smith made reference to a "public hanging," which conjured memories of public lynchings of African-Americans during the latter half of the 19th century and first half of the 20th century."If he invited me to a public hanging, I'd be on the front row," she said during what appeared to be a campaign event referencing the support of a Mississippi cattle rancher.In a statement later that day, Hyde-Smith said that she "used an exaggerated expression of regard, and any attempt to turn this into a negative connotation is ridiculous."Earlier on Tuesday, retail giant Walmart asked Hyde-Smith to return its donations to her campaign, joining Google, Union Pacific and Boston Scientific in rescinding their support of the Mississippi Republican.The-CNN-Wire 3172

NEAR CALIENTE, Nevada — Two single-engine planes collided Thursday afternoon while trying to contain a wildfire near Caliente, Nev., according to the Federal Aviation Administration.KTNV in Las Vegas, reports the collision occurred at about 1 p.m. MT between two Air Tractor AT8T airplanes. They were deployed to help battle the Bishop Fire, burning about 17 miles from Caliente and more than two hours northeast of Las Vegas.Officials say one person was aboard each aircraft at the time of the crash, and the Bureau of Land Management later confirmed the pilots died in the collision.“We offer our sincere condolences to the families of the two pilots and to all those working with the BLM Nevada Ely District,” said BLM Nevada State Director Jon Raby.Ground and aerial resources continued to take on the Bishop Fire in Rainbow Canyon as of Thursday afternoon, with the blaze approximately 500 acres.The airplanes involved are used to support firefighters on the ground and can deliver up to 800 gallons of fire retardant and operate in areas where larger air tankers cannot, according to the BLM. 1106

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