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中山肛门里有疙瘩
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发布时间: 2025-05-31 05:09:08北京青年报社官方账号
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  中山肛门里有疙瘩   

As the country continues to rebound, we are hearing a different strategy on kids going back to in-person schooling.“We highlight the need for in the reopening to focus on the children who are most at risk and prioritize those with the greatest needs,” said Christopher Morphew, dean of the Johns Hopkins University School of Education. Education and public health experts at Johns Hopkins outlined a six-point plan based on safety, health and academic needs. They focus first on kids with remote learning barriers, special education students, and those who rely on schools for food support.“We are seeing reports from children who say they aren’t learning as much, that they don’t have access to people to help them, that they don’t feel as comfortable learning,” said Morphew. The experts argue districts with limited resources should start with bringing back the youngest children first because they don't do as well with virtual learning. But they also warn a virtual backup plan is needed should virus cases show up in school.Families who may not feel comfortable going back or have special higher risk circumstances like a grandmother taking care of a young child should also have virtual options.There are other concerns beyond educational needs.“The kids get a lot of social and emotional development. They get relationships with the teacher, which is extremely important for them and their friends, and cutting kids off from that for a critical period of their lives, for an extended period, is really detrimental to them,” said Dr. Josh Sharfstein with the Johns Hopkins Bloomberg School of Public Health.More than 20 million children rely on school breakfast or lunch for food. Surveys indicate one in five mothers report their children younger than 12 years old are going hungry. Another key role schools play – teachers and other officials recognize about one in five cases of possible child abuse. 1922

  中山肛门里有疙瘩   

B. Don Russell wasn’t thinking about preventing a wildfire when he developed a tool to detect power line problems before blackouts and bigger disasters.The electrical engineering professor at Texas A&M University figured he might save a life if his creation could prevent someone from being electrocuted by a downed live wire.But fire prevention may be his product’s biggest selling point in California and other places that have experienced devastating wildland blazes blamed on electrical equipment.“If we can find things when they start to fail, if we can find things that are in the process of degrading before a catastrophic event occurs, such as a downed line that might electrocute someone or a fire starting or even an outage for their customers, that’s kind of the Holy Grail,” Russell said.The technology he bills as a one-of-a kind diagnostic tool called Distribution Fault Anticipation is now in use in Texas and being tested in California by Pacific Gas & Electric Co. and Southern California Edison. The utilities have been blamed for some of the most destructive and deadliest fires in California.Texas A&M said the technology will also be tested in New Zealand and Australia, which is currently reeling from destructive wildfires.The tool detects variations in electrical currents caused by deteriorating conditions or equipment and notifies utility operators so they can send a crew to fix the problems, Russell said.It can anticipate many problems in their early stages — sometimes years before they cause an outage or present a greater hazard during high winds when utilities are now pre-emptively shutting off power to prevent sparking wildfires.Before the technology was developed, electric companies often didn’t know they had a problem until there was a failure or a customer called to report sparks on power lines or a loss of electricity.“The assumption the utility has to make today is it’s healthy until we get a call that says somebody’s lights (are) out,” Russell said. “By then the fire’s started or the outage has happened or the person’s electrocuted.”Pedernales Electric Cooperative Inc. that serves about 330,000 customers outside San Antonio and Austin, Texas, began implementing the system after successful tests that began in 2015. The utility serves areas so rural that before the technology was installed, electricity powering a pump on a well could have been off for days before being detected by a farmer.The devices installed at substations are now trouble-shooting all kinds of problems, said Robert Peterson, principal engineer for the utility.“We’ve found tree branches on the line. Failing arrestors. Failing capacitors. Failing connections,” Peterson said. “It’s pretty amazing.”In California, the testing process has just begun and there are no results yet, according to PG&E and SoCal Edison.In Southern California, the software is running on just 60 of Edison’s 1,100 circuits in the utility’s high-risk fire zone, which accounts for about a quarter of its total circuits.It’s just one of several tools the utility is testing to continue to modernize its system.“There is no silver bullet,” said Bill Chiu, managing director of grid modernization and resiliency at SoCal Edison. “This is really more of a preventive measure. ... The important point is this will be one of the suite of technology that will help us better assess the condition of the grid.”Chiu said the technology was not at the point where it could be used to determine where to shut off power when dangerous winds are forecast during dry conditions. He also said it won’t pinpoint problems but can help dispatch crews closer to the source of equipment that needs to be fixed, saving time that would be wasted patrolling miles of power lines.One question is whether the technology is economically feasible to deploy across tens of thousands of miles of power lines, Chiu said.At an expense estimated between ,000 to ,000 per circuit, it could cost the utility million in its high-risk fire area and that doesn’t include installation, operation and maintenance costs.That’s a fraction of what a moderate wildfire sparked by a utility could cost, Russell said.PG&E, which is testing the technology on nine circuits, was driven into bankruptcy protection this year while facing at least billion in losses from a series of deadly and destructive wildfires in 2017 and 2018.SoCal Edison recently agreed to pay 0 million to local governments to settle lawsuits over deadly wildfires sparked by its equipment during the last two years. That figure doesn’t include lawsuits by thousands who lost their homes in those fires or family members of 21 people killed when a mudslide tore down a fire-scarred mountain. Two other people were never found.Bluebonnet Electric Cooperative found the cost was feasible and has installed it on about a sixth of its circuits for the utility that has about 100,000 customers in Central Texas, said Eric Kocian, chief engineer and system operations officer.While the system has helped proactively diagnose problems and detect the cause of outages, the university team that developed it can often find problems the utility’s control room operators don’t detect.Pedernales Coop is working with an analytics company to streamline the analysis of the myriad information the software evaluates to find and fix problems in a day, Peterson said.Russell said he never had a hint the device his research team created 15 years ago would have fire prevention applications until a series of bad wildfires in Texas in 2011. They were focused on keeping power systems safe and the lights on.“It’s obvious now in today’s context of the drought that we’ve had in California and other places,” Russell said. “Serendipitously, that’s where we find ourselves today.” 5838

  中山肛门里有疙瘩   

Beijing is preparing a blacklist for foreign companies as trade tensions with the United States continue to escalate.The Chinese government is working to establish an "unreliable entity list" which would include foreign companies, individuals and organizations, according to a statement Friday from China's Commerce Ministry.Companies that violate market rules will be added to the list, according to the statement. Other targets include firms that block supplies to Chinese companies for "non-commercial reasons" or otherwise damage their interests.The exact details of the plan will be announced soon, the statement added.The move to establish a blacklist comes after the United States hit Huawei with an export ban, 731

  

An emotional-support dog bit an American Airlines flight attendant Monday, resulting in an injury that required five stitches.The incident occurred on Flight 3506 from Dallas to Greensboro, North Carolina, operated by partner Envoy Air, American Airlines said.Medical personnel examined the attendant when the plane arrived. He did not require treatment and was cleared to return to Dallas/Fort Worth, where he received five stitches, the airline said.American Airlines did not say what type of dog was involved.The Association of Flight Attendants called for the 576

  

California Gov. Gavin Newsom passed SB 206, also known as the Fair Pay to Play Act, into law Monday. The law allows college athletes to profit from their name, image and likeness.The bill will go into effect in 2023, and if the bill survives the expected court challenges, it could reshape the NCAA's business model.The formal signing of the bill was done on LeBron James' show on HBO called "The Shop.""I'm so incredibly proud to share this moment with all of you," James wrote on Twitter. "@gavinnewsom came to The Shop to do something that will change the lives for countless athletes who deserve it! @uninterrupted hosted the formal signing for SB 206 allowing college athletes to responsibly get paid."The Fair Pay to Play Act allows college athletes in California to sign endorsement deals; earn compensation based on the usage of their name, image and likeness; and sign all types of licensing contracts that would allow them to earn money.These college athletes would also be able to hire an agent licensed by the state to represent them in any deals."Currently, student athletes are prohibited from being compensated even though their respective college or university makes millions from their athletic performance. That participation often comes at great risk to their health, academic success, and professional prospects," the Governor's office said in a statement."SB 206 makes California the first state in the nation to allow college athletes to receive compensation from the use of their name, image and likeness." 1541

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