Tag Archives: domestic-health and science

Scientists create ‘baby’ wormhole as sci-fi moves closer to fact

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more.

In science fiction – think films and TV like “Interstellar” and “Star Trek” – wormholes in the cosmos serve as portals through space and time for spacecraft to traverse unimaginable distances with ease. If only it were that simple.

Scientists have long pursued a deeper understanding of wormholes and now appear to be making progress. Researchers announced on Wednesday that they forged two minuscule simulated black holes – those extraordinarily dense celestial objects with gravity so powerful that not even light can escape – in a quantum computer and transmitted a message between them through what amounted to a tunnel in space-time.

It was a “baby wormhole,” according to Caltech physicist Maria Spiropulu, a co-author of the research published in the journal Nature. But scientists are a long way from being able to send people or other living beings through such a portal, she said.

“Experimentally, for me, I will tell you that it’s very, very far away. People come to me and they ask me, ‘Can you put your dog in the wormhole?’ So, no,” Spiropulu told reporters during a video briefing. “That’s a huge leap.”

“There’s a difference between something being possible in principle and possible in reality,” added physicist and study co-author Joseph Lykken of Fermilab, America’s particle physics and accelerator laboratory. “So don’t hold your breath about sending your dog through the wormhole. But you have to start somewhere. And I think to me it’s just exciting that we’re able to get our hands on this at all.”

The researchers observed the wormhole dynamics on a quantum device at Alphabet’s Google called the Sycamore quantum processor.

A wormhole – a rupture in space and time – is considered a bridge between two remote regions in the universe. Scientists refer to them as Einstein-Rosen bridges after the two physicists who described them – Albert Einstein and Nathan Rosen.

Such wormholes are consistent with Einstein’s theory of general relativity, which focuses on gravity, one of the fundamental forces in the universe. The term “wormhole” was coined by physicist John Wheeler in the 1950s.

Spiropulu said the researchers found a quantum system that exhibits key properties of a gravitational wormhole but was small enough to implement on existing quantum hardware.

“It looks like a duck, it walks like a duck, it quacks like a duck. So that’s what we can say at this point – that we have something that in terms of the properties we look at, it looks like a wormhole,” Lykken said.

The researchers said no rupture of space and time was created in physical space in the experiment, though a traversable wormhole appeared to have emerged based on quantum information teleported using quantum codes on the quantum processor.

“These ideas have been around for a long time and they’re very powerful ideas,” Lykken said.

“But in the end, we’re in experimental science, and we’ve been struggling now for a very long time to find a way to explore these ideas in the laboratory. And that’s what’s really exciting about this. It’s not just, ‘Well, wormholes are cool.’ This is a way to actually look at these very fundamental problems of our universe in a laboratory setting.”

Read original article here

Covid-19 protests: China entering ‘new stage and mission’ for pandemic controls, says Vice Premier Sun Chunlan



CNN
 — 

China’s most senior official in charge of its Covid response told health officials Wednesday that the country faced a “new stage and mission” in pandemic controls, state media Xinhua reported – potentially indicating an adjustment to Beijing’s “zero-Covid” strategy which has sparked days of nationwide protests.

“With the decreasing toxicity of the Omicron variant, the increasing vaccination rate and the accumulating experience of outbreak control and prevention, China’s pandemic containment faces new stage and mission,” Sun Chunlan, China’s vice premier, said Wednesday, according to Xinhua.

Making no mention of “zero-Covid,” her remarks, as reported by Xinhua, came a day after China’s National Health Commission (NHC) said the rectification of current pandemic measures is underway and local governments should “respond to and resolve the reasonable demands of the masses” in a timely manner.

In a meeting with the NHC on Wednesday, Sun also stated that a “human-centered approach” should be taken, and China should enhance its “diagnosis, testing, treatment and quarantine” measures, continue boosting vaccination rates – especially among the elderly people – and beef up medication and medical resources.

The softened rhetoric comes as officials in Guangzhou indicated an inching towards easing Covid-19 containment measures, after the southern metropolis saw protesters clash with police on Tuesday evening.

In a press briefing Wednesday, Zhang Yi, a spokesperson of Guangzhou’s health commission, said that the city has adjusted the designation of risk levels and pandemic containment measures – to a varying extent – in all its eleven districts.

Lockdowns in four districts – namely Liwan, Baiyun, Tianhe and Haizhu – have been lifted, while lockdowns remain in areas designated as high-risk.

Guangzhou will stop sending all close contacts of Covid-19 patients to central quarantine facilities and allow some to isolate at home if they meet the requirements, Zhang said.

The city will also no longer launch district-wide mass Covid-19 testing. “All districts should conduct testing in a scientific manner,” Zhang added.

On Tuesday, Guangzhou reported 6,995 new local cases, Zhang said. China reported 37,612 new local cases nationwide on Tuesday, the NHC said Wednesday.

China has moved quickly to suppress demonstrations that erupted across the country against the government’s zero-Covid policy over the past few days, deploying police forces at key protest sites and tightening online censorship.

The protests were triggered by a deadly fire last Thursday in Urumqi, the capital of the far western region of Xinjiang. The blaze killed at least 10 people and injured nine in an apartment building – leading to public fury after videos of the incident appeared to show lockdown measures had delayed firefighters from reaching the victims.

Public protest is exceedingly rare in China, where the Communist Party has tightened its grip on all aspects of life, launched a sweeping crackdown on dissent, wiped out much of civil society and built a high-tech surveillance state.

Read original article here

RSV, flu and colds: How to tell when your child is too sick for school



CNN
 — 

A sniffle, a sneeze or a cough can set off alarm bells these days for families with young children.

Mother of two Vickie Leon said her kids, ages 4 and 2, can sometimes go a month or two without bringing anything back from day care. Then there are times when it seems the family in Aurora, Colorado, is sniffling with a virus every other week.

“Once that hits, we are just in it for a while,” she said.

Many kids have spent years socially distancing to protect against Covid-19, and now health care systems are being overloaded with cases of the respiratory virus RSV — which can cause a runny nose, decreased appetite, coughing, sneezing, fever and wheezing.

The viral infection has always been common. Almost all children catch RSV at some point before they turn 2, the US Centers for Disease Control and Prevention says. And immunity developed after an infection often wanes over time, leading people to have multiple infections in a lifetime, said Dr. William Schaffner, a professor in the Division of Infectious Diseases at Vanderbilt University School of Medicine in Nashville, Tennessee.

The public health challenge this year is that while many children were kept home to protect against Covid-19, they were also isolated from RSV, meaning more are having their first — and therefore most severe — infection now, said CNN Medical Analyst Dr. Leana Wen, an emergency physician and professor of health policy and management at the George Washington University Milken Institute School of Public Health.

An RSV infection is often mild but could be a cause for concern for young infants, children with underlying conditions and older adults, said Schaffner, who is also medical director of the National Foundation for Infectious Diseases.

That doesn’t mean it is time to panic, added Wen, who is also author of “Lifelines: A Doctor’s Journey in the Fight for Public Health.” Catching RSV and other viral and bacterial infections is a part of children growing up and developing their immune system.

Here’s how to assess when to keep your child home from school and when to visit the pediatrician, according to experts.

Between colds, influenza, strep throat, RSV and lingering Covid-19, there are a lot of infections swirling about this winter — and they can often look a lot alike in terms of symptoms, Schaffner said. Even astute doctors may have trouble telling them apart when a patient is in the office, he added.

However, pediatricians are well practiced and equipped to treat upper respiratory infections, even if it isn’t possible to distinguish exactly which virus or bacteria is the cause, Wen said.

Whatever virus or bacteria is stirring up sniffles, headache or a sore throat in your household, the age, symptoms and health status of your child will likely make a difference in how you proceed, she said.

Ideally, public health professionals would like it if no child showing symptoms were sent to school or day care, where they could potentially spread infections Schaffner said. But — especially for single parents or caregivers who need to be at work — that is not always the most practical advice, he added.

At-home tests may signal if a child has a Covid-19 infection, he added. But for other viruses like a cold, there may not be a good way to know for sure.

Some symptoms that might really signal it is time to keep your child home from school or day care include high fever, vomiting, diarrhea, trouble eating, poor sleep or problems breathing, Wen said.

Donna Mazyck, a registered nurse and executive director of the National Association of School Nurses, breaks it down into two primary considerations: Does the child have a fever and are they too ill to engage with learning fully?

Families should also check their school’s guidelines, some of which can be detailed on when a child needs to be kept home from school, while others will rely more on parental judgment, she said.

“When in doubt, consult the school policies and have a plan with a pediatrician,” Wen said.

And for children at higher risk because of other medical conditions, consult with your pediatrician before your child gets sick so you know what to look for.

Again, here is where schools may have different policies and it becomes important to check with written information, a school administrator or school nurse, Wen said.

“Generally, the schools will ask that the child be fever free without the use of fever-reducing medications” before returning to the classroom, she said.

For children with asthma or allergies, it may not be reasonable to keep them out of school whenever they show any coughing or sniffling symptoms, Wen said. That could very well keep them out half the year.

And some symptoms, like a continued cough, may linger as an infection clears and a child recovers. In those cases, it may be appropriate to send a child back to school, Mazyck said, reiterating that it is important to check on the school’s guidelines.

Families are often good at bringing their children into the pediatrician when they seem unwell, Schaffner said. Still, with so many things going around, it is important to remind families that doctors would rather see kids who aren’t feeling well earlier than later, he added.

If they seem lethargic, stop eating or have difficulty breathing, parents and caregivers would also be justified in taking their kids to the pediatrician and seeking medical attention — especially if the symptoms worsen, Schaffner said.

“This is not something that they should hesitate about,” he said.

For younger babies and infants, it might be time to go to the emergency room if they are struggling to take in liquid or have dry diapers, flared nostrils, trouble breathing and a chest that contracts when it should expand, Wen added.

Families should seek emergency treatment for school-age kids who have trouble breathing and speaking in complete sentences, Wen said. Fortunately, most will not need emergency treatment — and those who do are usually back home and doing well in a couple days, Schaffner said.

“Parents should know that treating RSV and other respiratory infections is the bread and butter of pediatricians and emergency physicians,” Wen said. “This is what we do.”

To prevent these respiratory illnesses, teach your children to utilize the hygiene practices health care professionals were promoting long before the pandemic, like washing hands, using hand sanitizer when a sink isn’t available, coughing and sneezing into an elbow or tissue, and not sharing food or utensils with friends, Wen said.

There is not yet a vaccine for RSV approved by the US Food and Drug Administration, but there are effective ones available for influenza and Covid-19, Schaffner said.

If your child is not yet vaccinated, talk to their doctor about protecting them against these viruses, he added.

Read original article here

Dance of merging galaxies captured in new Webb telescope image

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more.



CNN
 — 

The beautiful chaos of two merging galaxies shines in the latest image captured by the James Webb Space Telescope.

Vice President Kamala Harris and French President Emmanuel Macron viewed the new Webb image, along with a new composite of the Pillars of Creation captured by the space observatory, during a visit to NASA Headquarters in Washington on Wednesday.

The Webb telescope, designed to observe faint, distant galaxies and other worlds, is an international mission between NASA and its partners, the European Space Agency and Canadian Space Agency.

The pair of galaxies, known as II ZW 96, are located some 500 million light-years from Earth in the Delphinus constellation. Dots of light in the image’s background represent other distant galaxies.

The swirling shape of the two galaxies was created when they began merging, disturbing their individual shapes. Galactic mergers occur when two or more galaxies collide in space.

Bright regions where stars are born glow at the center of the image, while the spiral arms of the lower galaxy are twisted by the gravitational pull of the merger.

Stars form when clouds of gas and dust collapse inside of galaxies. When galaxies merge, more star formation is triggered — and astronomers want to know why.

The luminous areas of star birth are of interest to astronomers using Webb because they appear even brighter when viewed in infrared light.

While infrared is invisible to the human eye, Webb’s capabilities allow it to spy previously unseen aspects of the universe.

Webb’s Near-Infrared Camera and Mid-Infrared Instrument were both used to capture the new image.

Astronomers are using the observatory to study how galaxies evolve and, among other topics, why luminous infrared galaxies like II ZW 96 shine brightly in infrared light, reaching luminosities more than 100 billion times that of our sun.

Researchers have turned Webb’s instruments on merging galaxies, including II ZW 96, to pick out fine details and compare the images with those previously taken by ground-based telescopes and the Hubble Space Telescope. Together, the observations can reveal a more complete picture of how galaxies change over time.

Read original article here

China to punish internet users for ‘liking’ posts in crackdown after zero-Covid protests


Hong Kong
CNN Business
 — 

Internet users in China will soon be held liable for liking posts deemed illegal or harmful, sparking fears that the world’s second largest economy plans to control social media like never before.

China’s internet watchdog is stepping up its regulation of cyberspace as authorities intensify their crackdown on online dissent amid growing public anger against the country’s stringent Covid restrictions.

The new rules come into force from Dec. 15, as part of a new set of guidelines published by the Cyberspace Administration of China (CAC) earlier this month. The CAC operates under the Central Cyberspace Affairs Commission chaired by leader Xi Jinping.

The new rules have gained attention on social media in recent days and will take effect just weeks after an unprecedented wave of public anger started sweeping the country. From Beijing to Shanghai, thousands of demonstrators protested in more than a dozen cities over the weekend, demanding an end to the country’s draconian Covid restrictions and calling for political freedoms.

Internet users are taking screenshots of content related to the protests to preserve them and using coded references in messages to evade censors, while the authorities are scrambling to scrub the internet of dissent.

The regulation is an updated version of one previously published in 2017. For the first time, it states that “likes” of public posts must be regulated, along with other types of comments. Public accounts must also actively vet every comment under their posts.

However, the rules didn’t elaborate on what kind of content would be deemed illegal or harmful.

“Liking something that is illegal shows that there is popular support for the issue being raised. Too many likes ‘can start a prairie fire,’” said David Zweig, professor emeritus at the Hong Kong University of Science and Technology, referring to a Chinese expression about how a single spark can start a far larger blaze.

“The threats to the [Chinese Communist Party] come from an ability to communicate across cities. The authorities must have been really spooked when so many people in so many cities came out at the same time,” he added.

Analysts said the new regulation was a sign that authorities were stepping up their crackdown on dissent.

“The authorities are very concerned with the spreading protest activities, and an important means of control is to stop the communications of the potential protesters including reports of protest activities and appeals of joining them,” said Joseph Cheng, a retired professor of political science at the City University of Hong Kong.

“This cyberspace control is an important lesson absorbed from protest activities like the Arab Spring,” he said, referring to protests that washed over Tunisia, Egypt, Libya, Syria, Yemen, Bahrain and the eastern province of Saudi Arabia in 2011.

“What is important to note is that in the wake of the [China] protests, we will likely see more aggressive policing of Chinese cyberspace, especially if the protests expand,” said Isaac Stone Fish, founder and CEO of Strategy Risks, a China risk consultancy firm based in Boston.

In recent years, China has gradually intensified its censorship of social media and other online platforms, including launching crackdowns on financial blogs and unruly fan culture. This year, the country’s strict zero-Covid policy and Xi’s securing of a historic third term have sparked discontent and anger among many online users.

But under the increasingly strict internet censorship, many voices of dissent have been silenced.

According to the regulation, all online sites are required to verify users’ real identities before allowing them to submit comments or like posts. Users have to be verified by providing their personal ID, mobile phone, or social credit numbers.

All online platforms must set up a “vetting and editing team” for real-time monitoring, reporting, or deleting content. In particular, comments on news stories must be reviewed by the sites before they can appear online.

All platforms also need to develop a credit rating system for users based on their comments and likes. Users with poor ratings dubbed “dishonest” will be added to a blocklist and banned from using the platform or registering new accounts.

However, analysts also questioned how practical it would be to carry out the newest rules, given that public anger is widespread and strict enforcement of these censorship requirements would consume significant resources.

“It is almost impossible to stop the spread of protest activities as the dissatisfaction continues to spread. The angry people can come up with all sorts of ways to communicate and express their feelings,” Cheng said. “The major deterrent lies in the perception that the (Communist) Party regime is still in control and the sanctions are severe.”

Chongyi Feng, an associate professor in China Studies at the University of Technology Sydney, said that it is “extremely difficult” now for the Chinese public to voice their grievances and anger.

“Cyberspace policing by Chinese authorities is already beyond measure, but that does not stop brave Chinese citizens from challenging the regime,” he said.

Read original article here

China’s Zhengzhou, home to world’s largest iPhone factory, ends Covid lockdown


Hong Kong
CNN Business
 — 

The central Chinese city of Zhengzhou, home to the world’s largest iPhone factory, has lifted a five-day Covid lockdown, in a move that analysts have called a much-needed relief for Apple and its main supplier Foxconn.

Zhengzhou is the site of “iPhone City,” a sprawling manufacturing campus owned by Taiwanese contract manufacturer Foxconn that normally houses about 200,000 workers churning out products for Apple

(AAPL), including the iPhone 14 Pro and 14 Pro Max. Last Friday, the city locked down its urban districts for five days as Covid-19 cases surged there.

Foxconn’s massive facility is not part of the city’s urban districts. However, analysts say the lockdown would have been detrimental to efforts to restore lost production at the campus, the site of a violent workers’ revolt last week.

“This is some good news in a dark storm for Cupertino,” Daniel Ives, managing director of equity research at Wedbush Securities, told CNN Business, referring to the California city where Apple is based. “There is a lot of heavy lifting ahead for Apple to ramp back up the factories.”

Ives estimates the ongoing supply disruptions at Foxconn’s Zhengzhou campus were costing Apple roughly $1 billion a week in lost iPhone sales. The troubles started in October when workers left the campus in Zhengzhou, the capital of the central province of Henan, due to Covid-related fears. Short on staff, bonuses were offered to workers to return.

But protests broke out last week when the newly hired staff said management had reneged on their promises. The workers, who clashed with security officers, were eventually offered cash to quit and leave.

Analysts said Foxconn’s production woes will speed up the pace of supply chain diversification away from China to countries like India.

Ming-Chi Kuo, an analyst at TF International Securities, wrote on social media that he estimated iPhone shipments could be 20% lower than expected in the current October-to-December quarter. The average capacity utilization rate of the Zhengzhou plant was only about 20% in November, he said, and was expected to improve to 30% to 40% in December.

Total iPhone 14 Pro and 14 Pro Max shipments in the current quarter would be 15 million to 20 million units less than previously anticipated, according to Kuo. Due to the high price of the iPhone 14 Pro series, Apple’s overall iPhone revenue in the current holiday quarter could be 20% to 30% lower than investors’ expectations, he added.

Read original article here