济南为什么硬不起来了(济南前列腺炎治疗指南) (今日更新中)

SAN FRANCISCO (AP) — Google announced Wednesday it has achieved a breakthrough in quantum computing, saying it has developed an experimental processor that took just minutes to complete a calculation that would take the world's best supercomputer thousands of years.The feat could open the door someday to machines so blazingly fast that they could revolutionize such tasks as finding new medicines, developing vastly smarter artificial intelligence systems and, most ominously, cracking the encryption that protects some of the world's most closely guarded secrets.Such practical uses are still probably decades away, scientists said. But the latest findings, published in the scientific journal Nature, show that "quantum speedup is achievable in a real-world system and is not precluded by any hidden physical laws," the researchers wrote.RELATED: Google Maps will now allow drivers to report hazards, slowdowns and speed trapsBig tech companies including Microsoft, IBM and Intel are avidly pursuing quantum computing, a new and somewhat bewildering technology for vastly sped-up information processing.While conventional computing relies on bits, or pieces of data that bear either a one or zero, quantum computing employs quantum bits, or qubits, that contain values of one and zero simultaneously.But quantum computing requires placing the fragile and volatile qubits in colder-than-outer-space-refrigerators to control them.Google's quantum processor looks like an upside-down garbage can, out of which comes a series of tubes used to conduct signals to a chip. The whole thing is stored in a cool chamber to protect the chip.RELATED: Google unveils new Pixel 4 smartphone, Pixel BudsGoogle said that its quantum processor, called Sycamore, finished a calculation in 3 minutes, 20 seconds — and that it would take the world's fastest supercomputer 10,000 years to do the same thing.The calculation was a random sampling problem, similar to looking at the various combinations that could come from dice or a gambling machine. It has little practical value, other than to test how well the processor works."The more interesting milestone will be a useful application," said Chris Monroe, a University of Maryland physicist who is also the founder of quantum startup IonQ.Google's findings, however, faced pushback from other industry researchers. A version of Google's paper leaked online last month.IBM took issue with Google's claim that it had achieved "quantum supremacy," or the point when a quantum computer can perform a calculation that a traditional computer can't complete within its lifetime.IBM researchers said that its IBM-developed supercomputer, called Summit, could actually do the calculation in 2.5 days.Google disputed IBM's claims.Whether or not Google achieved "quantum supremacy," the research suggests the field is maturing."The quantum supremacy milestone allegedly achieved by Google is a pivotal step in the quest for practical quantum computers," John Preskill, the Caltech professor who coined the term "quantum supremacy," wrote in a column after the paper was leaked.It means quantum computing research can enter a new stage, he wrote, though a significant effect on society "may still be decades away."One feared outcome — though experts said it is a long way off — is a computer powerful enough to break today's best cryptography.Quantum computers might also one day lead to the development of better artificial intelligence systems to guide financial portfolios, crop yields or transportation routes.The promise of such applications has attracted interest from the U.S., China and other governments. President Donald Trump last year signed a measure to spend more than .2 billion over five years for quantum research across the federal government. 3797

SAN DIEGO COUNTY (KGTV)-- Many Californians have not stepped out of their homes since Thursday after Governor Gavin Newsom issued the State-wide Stay-at-home order. But some are beginning to head outdoors, just with many precautions. Just a few days into the Governor's Stay-at-home order, many San Diegans are already getting cabin fever."With our gyms closed, we got to get exercise somehow," Joann Carcioppolo said. With no access to their weights and machines, Carcioppolo and her friend Janice Meyers decided to take a stroll around Pacific Beach. Of course, keeping in mind, Rule #1. "Doing our social distancing!" Meyers laughed. Families also took to the outdoors, hiking and hitting the parks. Instead of having their children clued to their devices, the Marcussen's spent the day at Calavera Hills Community Park in Carlsbad. Mother, Candice, said today, her children's playtime had a little bit of a modification. "We're not letting them play on the playground," Marcussen said. "They brought their own toys down to make sure that we stay healthy and clean."Now that kids do not have school, and parents are working from home, things can get mundane. But many said they are trying to stay positive during this global pandemic. "Were are just trying to be kind grateful for this extra time together that we wouldn't normally have had. And just roll with it because what else are we going to do?" Marcussen asked."Everybody, get out there and move!" Meyers said. "I mean, just keep that social distance. You got to get the fresh air and stay healthy. That's the biggest thing!" 1594

San Diego, CA (KGTV)- Some high school students in the Grossmont Union High School District will return to partial in-person learning starting on September 29.Sixty-eight percent of parents surveyed districtwide wanted their high school students to return to an in-person, blended learning model, while 32 percent wanted their students to stay in full-time distance learning from home.The district is moving forward with both options.Starting Tuesday, some students will be back on campus with limitations."Students have to be divided into smaller groups," said Theresa Kemper, the district's superintendent.If parents chose the blended learning model, their student has been assigned to Group A, Group B, Group C, or Group D, based on factions like students per household, transportation needs, and course schedule."They each will come to school one day a week," she said.The group placement determines which day the students will come to campus; they will be learning from home the rest of the time.The district created a roadmap for reopening, which includes five levels."We want to make sure that we're really confident with new routines that have been established, we want to make sure the county health conditions are continuing to improve," said Kemper.All schools in the district have been operating at Level 1, which is strictly distance learning.Level 2 begins next week and allows students to learn on campus one day a week, with 25 percent of the campus population, in class sizes of eight to twelve students."Our Special Education academies and alternative schools are also starting at Level 2, but will attend two days a week instead of one," she said.All students will be screened and have their temperatures checked before entering the classroom, teachers, and staff will be tested for COVID-19 regularly, and everyone will be required to wear facial coverings.The schools will also be deep cleaned each day, and students will be physically distanced from one another."If everything looks good, after about two weeks, we could potentially announce going to the next level," said Kemper.By level five, students will be back on campus five days a week.Kemper said the district is taking a cautious approach and has plans in place if a school needs to jump back a level at any time."If we change from two days a week to one day a week, then we already got a plan in place, and it's easy to transition to that," she said. "I want parents and students to know we are so excited to see him, there's no place like school." 2539

SAN DIEGO, Calif. (KGTV)- Video of a disturbing racist rant was captured in downtown San Diego Tuesday, and the man who experienced the verbal attack is sharing his story.Rodney Jackson was working as a security guard outside of the Pinnacle on the Park apartment complex in the East Village when an unidentified woman began hurling racial slurs at him.“I was trying my best to diffuse the situation, and she just continued to antagonize,” said Jackson. “It kind of caught me off guard because I’ve never dealt with anything like that before.”RELATED: Mother responds to video showing woman hurling racial slurs at son (VIDEO)In the video he recorded, the woman repeatedly attacks Jackson with racial slurs, even after he asks her to stop.“I started recording just to save myself because of everything going on,” he said.The unprovoked verbal attack happened in the early morning hours on Tuesday.Jackson said the woman was kicked out of a party at the high rise.“She went outside and started arguing with some people walking back, I asked her to come in the building, and I’ll call her a cab,” he said.He said she appeared to be intoxicated and suddenly directed her anger at him.“I told her again, ‘I called you a cab, but I don’t agree with the way you’re calling me all these different names’ and she just continues.”The video shows the woman calling Jackson the N-word repeatedly during the confrontation.“If you’re going to act like a n-----, then I’m going to call you n-----,” the unidentified woman shouts at Jackson. “I don’t [expletive] care!”Jackson remains calm and composed as the woman continues to harass him.“My mother and my grandmother, they raised me never to let anyone get me too upset to where it gets me out of character or changes the person that I am,” he said. “They raised me to be a strong black man.”Jackson said he grew up in National City in a multi-cultural neighborhood, and this was his first time experiencing something like this.“I’ve never looked at people by their color,” he said. “I played semi-pro football for a San Diego team, and we had people from all kinds of ethnic backgrounds, and we’re all just a family.”Jackson’s brother and mother shared the video on social media to highlight the issue of racism.He said he hopes the painful video will serve as a reminder that racism does still exists, even in that community.“Be open-minded and accept people for who they are. The stronger everyone comes together, the better the world will be,” he said.He wants anyone who has experienced racism to remember this: “Stand strong for yourself and don’t ever let anyone belittle you or make you feel like less of a person.” 2669

SAN DIEGO, Calif. (KGTV) - UC San Diego is a pilot school for an exposure notification system that alerts users if they’ve come in contact with someone who tests positive for COVID-19. It’s a partnership with the state of California and officially launched on campus Thursday.The system uses smartphone technology to anonymously tell people they may have been exposed. It does not track locations and is completely anonymous. It starts working when a person downloads the system on their phone and enables notifications. It then records proximity to other devices that also have the program downloaded. If two phones come in contact with each other for more than about 15 minutes and are closer than around six feet, it takes note of that. Then, if a person tests positive later, they can go in the program and click a button saying they tested positive, and their system sifts through all the devices that previously had extended exposure, sending those users alerts about the possible exposure.Doctor Christopher Longhurst, Chief Information Officer and Associate Chief Medical Officer for UCSD Health said the biggest factor that will impact effectiveness is the number of users.“We’d like to see 75% of that community or more adopting. Modeling done by Oxford and other universities has shown that if we can get over 50% adoption in a population, you can actually help to end outbreaks,” said Doctor Longhurst.As of Friday, about one day into the official launch, the school said 7,985 people had signed up. The school could confirm there are about 10,500 students living on campus, but was not able to share how many faculty and staff are on campus.For instructions on how to download, click here. 1710

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