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2025-06-04 10:54:37
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  北海工业吸尘器   

Being home more during the pandemic, and with less traffic on the roads from stay-at-home orders, many people have heard more bird calls and the sounds of nature in urban areas. Scientists now say at least one bird species has been able to adjust their bird song because of the lack of human noise to compete with.Researchers have been studying the white-crowned sparrows in and around San Francisco for more than two decades. They compare their songs in recent years with recordings made in the 1970s.They found as traffic levels increased over the decades, the lowest frequencies of the sparrows’ song rose. This allowed their song to be heard above the low hum of vehicles. The top frequencies remained the same, so the total frequency bandwidth of their communication was narrowed.Degrading their songs this way, and limiting their range, makes them less effective at deterring rivals, attracting mates, or hearing their own chicks, according to researchers. In noisy environments, birds have to sing louder, which research has shown can result in stress and can speed up a bird’s aging and disrupt their metabolisms.When stay-at-home orders and coronavirus pandemic safety measures were put in place in March, the lead researcher, Elizabeth Derryberry, remembers seeing an image of the Golden Gate Bridge in San Francisco completely empty of cars or humans. She wondered how the sparrows were responding.They compared audio recordings of the bird songs from spring 2015 and 2016, to those taken this spring. The recordings were made in a variety of urban and rural locations around the greater San Francisco area.“We found that birds sung at lower minimum frequencies, achieving greater bandwidth songs in newly open acoustic space. An increase in frequency bandwidth results in the transmission of more information and greater vocal performance,” the study states.The samples taken in 2020 revealed the white-crowned sparrows had changed their tune, so-to-speak, and were singing softer and using a wider range of frequencies. They also were able to communicate twice as far as previous recordings.“This doubling in communication distance could elevate fitness by reducing territorial conflicts and increasing mating potential,” researchers stated.Researchers also say this explains why more people report hearing birds during the pandemic. Since the songs are traveling farther distances, humans are able to hear more of them.They also say the changes in the birds’ songs were more pronounced in urban areas compared to the rural location samples. This would make sense, they say, because the traffic noise did not change as drastically in the rural locations during the pandemic.“Our findings indicate that songbirds like white-crowned sparrows have a striking capacity to exploit newly empty soundscapes following acute but ephemeral amelioration of noise pollution, suggesting that lasting remediation might engender even more promising outcomes, such as demographic recovery and higher species diversity in urban areas,” they concluded. 3055

  北海工业吸尘器   

Before 36-year-old James Eberling died in November 2016, he told his parents he had one final wish:He wanted his remains to be sent into space.Now Eberling's dream is about to be realized, as his and about 100 others' cremated remains were launched into space Monday in a memorial satellite by the company Elysium Space.The San Francisco-based company said families paid about ,500 to have a sample of their loved ones' ashes placed aboard the SpaceX Falcon 9 rocket.Traveling into space will be the remains of military veterans and aerospace enthusiasts, alongside those whose families were "looking to celebrate a loved one within the poetry of the starry sky," Elysium Space said in an emailed statement.James' ashes and the others were packed into a 4-inch square satellite called a cubesat, Elysium Space Founder and CEO Thomas Civeit said. Families will be able to track the spacecraft in real-time through an app as it orbits the earth for about four years before it falls back to Earth, according to Civeit.The launch is part of a "rideshare mission" organized by Spaceflight. The company said it purchased the rocket to accommodate clients, which range from schools to commercial businesses to government entities and international organizations. Sixty-four small satellites from 34 different organizations will be aboard, Spaceflight said. 1359

  北海工业吸尘器   

BATON ROUGE, La. — A photo is going viral on Facebook for all the right reasons.A group of teens playing basketball in Franlinton, Louisiana took a knee during their game to honor a funeral procession passing by on Friday, WAFB reports.Lynn Bienvenu posted about it on Facebook, saying there was no adult in sight to tell them to stop playing.She also said the gesture meant a great deal to her family.The post had been shared more than 1,300 times as of Monday morning. 493

  

Black people were nearly four times more likely than white people to be hospitalized with COVID-19 among people with Medicare, the government said Monday.The analysis from the federal Centers for Medicare and Medicaid Services also found that having advanced kidney disease was an even more severe risk indicator for hospitalization than race, ethnicity, or being poor.“It reconfirms long-standing issues around disparities and vulnerable populations,” said Medicare administrator Seema Verma, adding that “race and ethnicity are far from the only story.″Medicare’s analysis confirms what The Associated Press and other media organizations have previously reported about African Americans and Latinos bearing the brunt of the pandemic, while adding new details.The group covered by Medicare is considered the most vulnerable to the coronavirus. Most of its 60 million enrollees are age 65 and older. Also covered are younger people who qualify because of disabilities.From Jan. 1-May 16, more than 325,000 Medicare recipients were diagnosed with COVID-19, and nearly 110,000 were hospitalized, according to the analysis of claims data. Medicare spent .9 billion for hospital care, an average of about ,000 per case for people enrolled in the traditional fee-for-service part of the program.The analysis found that:— Black people with Medicare were hospitalized at a rate of 465 per 100,000 enrollees, or nearly four times the rate for whites, which was 123 per 100,000.— The rate for Hispanics was 258 per 100,000, or about twice the rate of whites. Asians were about one-and-a-half times more likely than whites to be hospitalized for COVID-19.— Low-income Medicare recipients who are also covered by their state Medicaid programs had a hospitalization rate that was slightly higher than the rate for African Americans.— There were fewer COVID-19 cases and hospitalizations among Medicare recipients in rural areas, when compared to cities and suburbs.But all in all, having advanced kidney disease was by far the biggest risk factor, the study found. People whose kidneys have stopped working to the point where they can’t live without dialysis or a transplant had a hospitalization rate of 1,341 per 100,000, or nearly three times higher than the rates for low-income beneficiaries and African-Americans.Verma said this may reflect the fact that people with advanced kidney disease generally also suffer from other medical problems that worsen COVID-19 outcomes, such as diabetes. Patients typically have to travel to a special facility to get dialysis, and the treatment can bring them together with others who may have been exposed.Medical problems such as high blood pressure and heart conditions also tend to be more prevalent among Blacks and Latinos, increasing their risks for severe coronavirus infections.Taken together, the Medicare data call for a greater focus on social conditions that contribute to poor health, Verma said, as well as continuing to expand coordinated care for patients trying to cope with several chronic conditions at a time.The Medicare data released Monday lack complete information about deaths, since they only record those who passed away in a hospital. 3206

  

BARONA, Calif. (KGTV) -- As the nation observes Native American Heritage Month, the tragic and triumphant story of Matt LaChappa, the longest-tenured San Diego Padres player, demonstrates there are different types of tribes.With a 95 mile-per-hour fastball and a 6'3" frame, LaChappa was precisely the kind of prospect the San Diego Padres were looking for.The team drafted him out of high school in 1993, and they found him in an unlikely place: the Barona Reservation."Matt was like any other kid on an Indian Reservation, a lot of poverty," said his father Clifford LaChappa.The elder LaChappa admits he never expected to see his son go from the ball fields at Barona to the second round of the MLB draft, then to a promotion on the Padres Class A Advanced farm team, which at that time was the Rancho Cucamonga Quakes."He was pegged to make it, but God had other plans for him," Clifford LaChappa said.RELATED: Celebrating Community: Kumeyaay People of San DiegoWhile Matt was warming up in the bullpen during a game on April 6, 1996, he suffered a heart attack. He spent months in a coma.Today, he's 44 years old and living with a brain injury. He can speak a few words, like "hi Dad," with difficulty."He can't get up, he can't walk," Clifford LaChappa said. "He can't shave or shower."That's where his first tribe comes in. Family members and caregivers provide Matt with round-the-clock care.But behind the scenes, there's a second team in Matt's corner. RELATED: Native American tribes join to celebrate life and heritage at San Diego powwowEvery year since he collapsed, the Padres have signed Matt to a rookie contract so that, in part, he has ongoing access to medical care."They're totally our family," Clifford said. "They're always there for Matt."Matt LaChappa now has a little league field named in his honor in Lakeside, and he gives right back to the community that supports him. With help from the Barona tribe, Matt and his family host an annual charity golf tournament. The proceeds fund five academic scholarships a year for Native American students in San Diego County."Why was it important to do something like that?" I asked Clifford."Because of Matt," he responded. A few feet away, Matt howled.RELATED: Powwow showcases Native American traditions"He's crying," Clifford explained. "Because Matt was a giver."On the 25th anniversary of the day that changed Matt LaChappa's life, the Quakes invited Matt and his family to throw out the first pitch."When we got there, when we saw everybody clap, it was like a comfort. They really cared," Clifford said. It was a sign of yet another tribe in Matt LaChappa's corner. 2649

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