苏州新能源纯电动车磁阻电机解剖模型秦皇岛工业机器人实训系统,衡阳无线电压传感器,衢州变频调速技术实训装置,南充新能源汽车,银川虹吸实验装置,石家庄拖拉机整机电器实训台,青岛新能源纯电动汽车制动能量回收系统示教板

SEATTLE (AP) — U.S. scientists said Friday they will investigate why an unusual number of gray whales are washing up dead on West Coast beaches.About 70 whales have been found dead so far this year on the coasts of California, Oregon, Washington and Alaska, the most since 2000. About five more have been discovered on British Columbia beaches. That's a very small fraction of the total number of whales believed to have died, because most simply sink and others wash up in such remote areas they're not recorded.NOAA Fisheries on Friday declared the die-off an "unusual mortality event," providing additional resources to respond to the deaths and triggering the investigation."Many of the whales have been skinny and malnourished, and that suggests they may not have gotten enough to eat during their last feeding season in the Arctic," agency spokesman Michael Milstein told reporters during a conference call.The eastern North Pacific gray whales were removed from the endangered species list in 1994, after recovering from the whaling era.The population has grown significantly in the last decade and is now estimated at 27,000 — the highest since surveys began in 1967. That has raised questions about whether their population has reached the limit of what the environment can sustain. Another theory suggests that the loss of Arctic sea ice due to global warming is a culprit.The whales spend their summers feeding in the Arctic before migrating 10,000 miles (16,000 km) to winter off Mexico. Though they eat all along their route, they are typically thinning by the time they return north along the West Coast each spring.They eat many things, but especially amphipods, tiny shrimp-like creatures that live in sediment on the ocean floor in the Arctic. For many years, researchers noted that fewer calves tended to be born following years when the ice in the Chukchi Sea, north of the Bering Strait between Alaska and Russia, was late to melt. The whales had less time to feast because they couldn't access the feeding area, and thus had less blubber to sustain them on their next migration.Last year, though, the Artic was unusually warm. The whales weren't blocked from the feeding area, and yet are still struggling this year. That has scientists wondering if the loss of sea ice has led to a loss of algae that feed the amphipods. Surveys show the amphipod beds moving farther north, said Sue Moore, a biological oceanographer at the University of Washington."The sea ice has been changing very quickly over the last decade or so," she said. "The whales may have to shift to other prey, such as krill or other things they eat."In an average year, about 35 whales wash up in the U.S.In 2000, more than 100 did, prompting NOAA to declare an "unusual mortality event" then as well. The resulting investigation failed to identify a cause. The die-off followed strong changes in ocean conditions in the mid-1990s, suggesting that warmer water patterns affected the availability of prey, but scientists were often unable to perform necropsies, Moore said."It's sometimes very difficult to get to these whales in a timely fashion," she said. "You can't always get the kind of samples you would need for diagnostic reasons."Since then, researchers have built up an improved network of volunteers and have better educated the public to help report and respond to whale deaths, said Deborah Fauquier, veterinary medical officer at NOAA's Office of Protected Resources. This time around, scientists have been able to perform necropsies on 20 of the whales, she said.John Calambokidis, a research biologist with the Cascadia Research Collective, noted that as the whales search farther afield for food, they've entered areas where they're not normally seen so often, including San Francisco Bay and Puget Sound. That puts them at higher risk of being struck by ships or entangled in fishing gear.Four of the 10 gray whales found dead near San Francisco this year were struck by ships, and a number of shipping companies have slowed their vessels in the area to avoid collisions. 4086

SAN FRANCISCO (KGTV/AP) — California’s education chief has applauded the state’s two largest school districts, Los Angeles and San Diego, for this week’s decision not to reopen classrooms this fall amid rising coronavirus cases. But Tony Thurmond says the same rules need not apply in counties with low rates of infection. In a media briefing, Thurmond says that in counties where the number of cases is low, schools could reopen for in-person classes as long as they follow the state's guidance on physical distancing and wearing face coverings. “Everyone shares the desire to reopen schools and agrees that the best place for children to learn and thrive is in the classroom connected with caring teachers and staff. We also understand that schools are more than a place of learning: They provide critical necessities like meals, relationships with caring adults, and support for working parents,” said Thurmond. “But we can only open schools if it is safe to do so. As the largest educational agency in the country, our stance has been consistent during this pandemic: Science, data, and safety must guide any decision about reopening a school. The health and safety of our students and staff is too important to risk.”RELATED: San Diego Unified School District to start new year onlineThis week, San Diego Unified School District said schools will start the fall school year at home, before looking into a physical return to class."Unfortunately, much of the research is incomplete and many of the guidelines are vague and contradictory. One fact is clear: those countries that have managed to safely reopen schools have done so with declining infection rates and on-demand testing available. California has neither. The skyrocketing infection rates of the past few weeks make it clear the pandemic is not under control," the district said.SDUSD's 2020-2021 school year will start as scheduled on Aug. 31, officials said. 1933

SAN YSIDRO, Calif. (KGTV) -- Homeland Security Secretary Kirstjen Nielsen announced Thursday any caravan migrants who seek asylum in the United States must wait indefinitely in Mexico until their immigration proceedings at the U.S. Port of Entry are complete.In her speech, Nielsen announced the end of the American immigration policy nicknamed "Catch and Release." Catch is the migrants' initial meeting at the US Port of Entry. Release is the process in which asylum seekers are released into the U.S. with an ankle monitor until a later court hearing.The criticism has been that migrants ignore the court date and never finish their legal proceedings.Instead, in an emergency proclamation, Nielsen announced the start of what some are now calling the "Catch and Return" policy."Once implemented individuals arriving in or entering the United States from Mexico illegally or without proper documentation may be returned to Mexico for the duration of their immigration proceedings," Secretary Nielsen said. "They will not be able to disappear into the United States."While the Central American migrants wait indefinitely, Nielsen said that Mexico has agreed to provide humanitarian visas and work support.University of San Diego Immigration law professor Ev Meade said this new policy is not realistic. "Who's going to pay for the services that people need in Tijuana?" Meade said. "The US isn’t going to pay, Mexico just slashed its refugee budget for the upcoming year, and Tijuana really can’t afford to continue to pay for the services it's paying, and the state of Baja California is basically bankrupt." Meade said the Trump Administration's "out-of-sight, out-of-mind" mentality toward immigration, is irresponsible. "Just declaring as a blanket policy where Mexico is going to take responsibility for all of this, this seems like a colossal mistake," Meade said. He said many "Caravaners" do not want to stay in Tijuana, especially after a recent uptick in violence. Last weekend, two asylum-seeking Honduran teens were kidnapped, robbed and killed in Tijuana. Like many of the President’s other immigration policies, Meade believes this policy will most likely be shut down by a federal judge unless tweaks are made."If they make it more of a voluntary program where people can opt to do this, and it's incentivized and allows people to work in order to get themselves back together in Tijuana while they're waiting to get their case heard, and they've in fact decided to do that, then it could work for some members of the Caravan," Meade said. Homeland Security officials said this new policy excludes asylum seekers from Mexico. While the policy is effective immediately, the changes will be rolled out gradually across the border. 2753

SAN MARCOS, Calif. (KGTV) — Palomar Community College President Dr. Joi Lin Blake will resign this summer, after facing criticism over a recent budget report warning of the district's fiscal instability.This week the district's Governing Board approved the agreement for Blake to resign, which will take effect June 30. Blake was placed on leave following the Fiscal Crisis Management Assistance Team (FCMAT) report.Palomar Vice President Jack Kahn will serve at Acting Superintendent and President. Kahn has held that position since December when Blake was placed on leave.RELATED: Palomar College president placed on leave pending investigationBlake's resignation comes as the college district faces a nearly million deficit in the 2019-2020 budget, according to the FCMAT report.The report warns that the district "has a high probability of fiscal insolvency in the near future" if it continues at its current pace. The district's 2018-19 budget had already faced a ,220,001 deficit.The FCMAT report adds that the district "will have consumed all reserves and will be forced to borrow .5 million from an external source to remain solvent" in the next two years. 1180

SCOTTSDALE, Arizona — From pre-made salads and sandwiches to ready-to-make meal kits and online ordering, the grocery store has become a conveyor belt of innovation the last few years.It’s time to throw another piece into the basket — driverless delivery. Kroger, the Cincinnati, Ohio-based grocery chain that operates Fry’s Food Stores, announced Thursday, Aug. 16, that it will begin testing its driverless delivery program in Scottsdale, Arizona. In June, the company said it was exploring the program and had partnered with Nuro, a company founded in 2016 that makes unmanned vehicles, but had not named where they would be tested.Now we know where.Starting Thursday, the program will only be available to those living in the 85257 zip code and within two miles of the Fry’s grocery store at 7770 E. McDowell Road in Scottsdale (near Scottsdale and North Hayden Roads).Here are a few things you need to know:WHAT IS IT?Forget going to the grocery store and walking the aisles to grab the milk, eggs and cheese. Under the test program, customers will be able to order their groceries via the Fry's Food Store app and website and have them delivered to their home by one of Nuro’s ten unmanned Toyota Prius vehicles.Each vehicle will deliver the groceries to a home’s curbside and can deliver up to 15 bags of groceries, said Pam Giannonatti, corporate affairs manager with Kroger.HOW SAFE IS IT?“Safety is Nuro’s top priority. They are relentlessly focused on ensuring their vehicles are not just good neighbors, but among the safest on the road,” Kroger said in a statement. “Their vehicles and the autonomy systems undergo extensive testing including a wide range of critical safety scenarios that require immediate response to prevent harm.”During the test, Kroger said each vehicle would have a safety test driver with it.HOW DOES IT WORK?Starting Thursday, Aug. 16, those living within the 85257 zip code can order groceries from the Fry’s Food app or website, https://www.frysfood.com.They can be delivered by one of Nuro’s vehicles that same day or the next day depending on availability.The delivery fee is .95 per order. There is no minimum order amount.“Arizona is home to some of the most innovative autonomous vehicle testing,” said Dave Ferguson, Nuro’s co-founder, in a prepared statement. “We’re proud to contribute and turn our vision for local commerce into a real, accessible service that residents of Scottsdale can use immediately. “We welcome innovative technology that can benefit the lives of Scottsdale residents. We feel this partnership holds tremendous potential and promise, and offers our residents real, not-yet-experienced convenience for everyday routines," Scottsdale Mayor Jim Lane said in a statement.Some of Arizona's top leaders, including Gov. Doug Ducey, have been supportive of autonomous technology.Uber began testing its self-driving technology in Arizona in February 2017, but shut down its operations earlier this year after one of its vehicles was involved in a deadly crash with a pedestrian.Waymo, a subsidiary of Alphabet Inc., the parent company of Google, is also testing self-driving vehicles in Arizona.Kroger did not say how long the pilot test would last nor if — or when — more locations would be added. 3291