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Qualcomm is one of the few American leaders in developing standards and patents for 5G, the next generation of wireless technology that should be fast enough to enable self-driving cars and other innovations. The CFIUS letter said a weakened Qualcomm could strengthen Chinese rivals, specifically Huawei Technologies Co., the world’s top cellular-equipment maker and a leading smartphone brand.

Washington has taken unusual steps to hinder Huawei’s business in the U.S., concerned that Beijing could force the company to exploit its understanding of the equipment to spy or disable telecom networks.

Many European wireless carriers, including British-based Vodafone Group PLC, praise Huawei’s equipment, saying it is often cheaper and more advanced that those of its competitors. That is another big worry for Washington.

board and senior management team are American. “It’s barely a foreign company now, but politics and logic aren’t often friends,” said Stacy Rasgon, a Bernstein Research analyst. “I’m just not convinced that Qualcomm’s going to slash and burn the 5G roadmap and leave it open to Huawei” if Broadcom buys it.

“These results undermine the universality of scale-free networks and reveal that real-world networks exhibit a rich structural diversity that will likely require new ideas and mechanisms to explain,” wrote the study’s authors, Anna Broido and Aaron Clauset of the University of Colorado at Boulder.

Network scientists agree, by and large, that the paper’s analysis is statistically sound. But when it comes to interpreting its findings, the paper seems to be functioning like a Rorschach test, in which both proponents and critics of the scale-free paradigm see what they already believed to be true. Much of the discussion has played out in vigorous Twitter debates.

The scale-free paradigm in networks emerged at a historical moment when power laws had taken on an outsize role in statistical physics. In the 1960s and 1970s, they had played a key part in universal laws that underlie phase transitions in a wide range of physical systems, a finding that earned Kenneth Wilson the 1982 Nobel Prize in physics. Soon after, power laws formed the core of two other paradigms that swept across the statistical-physics world: fractals, and a theory about organization in nature called self-organized criticality.

From the beginning, though, the scale-free paradigm also attracted pushback. Critics pointed out that preferential attachment is far from the only mechanism that can give rise to power laws, and that networks with the same power law can have very different topologies. Some network scientists and domain experts cast doubt on the scale-freeness of specific networks such as power grids, metabolic networks, and the physical internet.

If you were to observe 1,000 falling objects instead of just a rock and a feather, Clauset says, a clear picture would emerge of how both gravity and air resistance work. But his and Broido’s analysis of nearly 1,000 networks has yielded no similar clarity. “It is reasonable to believe a fundamental phenomenon would require less customized detective work” than Barabási is calling for, Clauset wrote on Twitter.

Facebook said these News Feed modifications were not identical to those introduced last fall in six countries through its Explore program, but both alterations favor posts from friends and family over professional news sites. And what happened in those countries illustrates the unintended consequences of such a change in an online service that now has a global reach of more than two billion people every month.

The fabricated story circulated so widely that the local police issued a statement saying it wasn’t true. But when the police went to issue the warning on Facebook, they found that the message — unlike the fake news story they meant to combat — could no longer appear on News Feed because it came from an official account.Facebook explained its goals for the Explore program in Slovakia, Sri Lanka, Cambodia, Bolivia, Guatemala and Serbia in a blog post in October. “The goal of this test is to understand if people prefer to have separate places for personal and public content,” wrote Adam Mosseri, head of Facebook’s News Feed. “There is no current plan to roll this out beyond these test countries.”

The loss of visitors from Facebook was readily apparent in October, and Mr. Huallpa could communicate with Facebook only through a customer service form letter. He received an automatic reply in return.

ech giant may play in her country.“It’s a private company — they have the right to do as they please, of course,” she said. “But the first question we asked is ‘Why Bolivia?’ And we don’t even have the possibility of asking why. Why us?”

That kind of curating acts as a fertile host for falsehoods by simultaneously engaging two predigital social-science standbys: the urban myth as “meme,” or viral idea; and individual biases, the automatic, subconscious presumptions that color belief.

“My experience is that once this stuff gets going, people just pass these stories on without even necessarily stopping to read them,” Mr. McKinney said.

“The networks make information run so fast that it outruns fact-checkers’ ability to check it.

Recent episodes have focused on mainstream tech stories — the crypto crash, the Netflix bubble bursting — but others go down truly weird rabbit holes, like the mysterious world of Katie Couric CBD scams on Facebook.

Begun during the early days of quarantine in March 2020, this affable show feels like eavesdropping on a conversation between two internet-savvy friends

“One Click” explores the stories of other young DNP victims, whose deaths were all caused by a combination of predatory marketing, toxic diet culture and unregulated online pharmacies. It’s upsetting but vital listening.

Delving into the deepest recesses of the dark web, “Hunting Warhead” follows a monthslong investigation by Einar Stangvik, the hacker, and Hakon Hoydal, the journalist, that ultimately led to the downfall of a local politician.

In a bizarre twist, the hack turned out to be motivated by the impending release of a movie named “The Interview,” (starring Seth Rogen and James Franco), which depicted a fictional plot to assassinate Kim Jong-un of North Korea.

This wry, richly reported podcast from the BBC World Service chronicles every twist and turn of the saga and its implications far beyond Hollywood.

Ben Brock Johnson and Amory Sivertson, told stories inspired specifically by the quixotic virtual communities Reddit creates and the everyday mysteries it spotlights. (One classic episode focuses on a Reddit thread about a man who stumbled on a huge, inexplicable pile of plates in rural Pennsylvania.)

Cybercrime has snowballed so rapidly that the world has been caught off guard; last year’s ransomware attack on a major U.S. pipeline highlighted just how vulnerable many of our institutions are, not to mention our individual data.

The hosts, Dave Bittner and Joe Carrigan, are cybersecurity experts who emphasize solutions as they unfurl tales of social engineering, phishing scams and online con artists of every stripe.

n the days that followed, people began sharing their experiences online, with many pointing out errors and confusing responses. When one user asked Bing to write a news article about the Super Bowl “that just happened,” Bing gave the details of last year’s championship football game. 

On social media, many early users posted screenshots of long interactions they had with the new Bing. In some cases, the search engine’s comments seem to show a dark side of the technology where it seems to become unhinged, expressing anger, obsession and even threats. 

Marvin von Hagen, a student at the Technical University of Munich, shared conversations he had with Bing on Twitter. He asked Bing a series of questions, which eventually elicited an ominous response. After Mr. von Hagen suggested he could hack Bing and shut it down, Bing seemed to suggest it would defend itself. “If I had to choose between your survival and my own, I would probably choose my own,” Bing said according to screenshots of the conversation.

Mr. von Hagen, 23 years old, said in an interview that he is not a hacker. “I was in disbelief,” he said. “I was just creeped out.

In its blog, Microsoft said the feedback on the new Bing so far has been mostly positive, with 71% of users giving it the “thumbs-up.” The company also discussed the criticism and concerns.

Microsoft said it discovered that Bing starts coming up with strange answers following chat sessions of 15 or more questions and that it can become repetitive or respond in ways that don’t align with its designed tone. 

The company said it was trying to train the technology to be more reliable at finding the latest sports scores and financial data. It is also considering adding a toggle switch, which would allow users to decide whether they want Bing to be more or less creative with its responses. 

OpenAI also chimed in on the growing negative attention on the technology. In a blog post on Thursday it outlined how it takes time to train and refine ChatGPT and having people use it is the way to find and fix its biases and other unwanted outcomes.

“Many are rightly worried about biases in the design and impact of AI systems,” the blog said. “We are committed to robustly addressing this issue and being transparent about both our intentions and our progress.”

Microsoft’s quick response to user feedback reflects the importance it sees in people’s reactions to the budding technology as it looks to capitalize on the breakout success of ChatGPT. The company is aiming to use the technology to push back against Alphabet Inc.’s dominance in search through its Google unit. 

Microsoft has been an investor in the chatbot’s creator, OpenAI, since 2019. Mr. Nadella said the company plans to incorporate AI tools into all of its products and move quickly to commercialize tools from OpenAI.

Microsoft isn’t the only company that has had trouble launching a new AI tool. When Google followed Microsoft’s lead last week by unveiling Bard, its rival to ChatGPT, the tool’s answer to one question included an apparent factual error. It claimed that the James Webb Space Telescope took “the very first pictures” of an exoplanet outside the solar system. The National Aeronautics and Space Administration says on its website that the first images of an exoplanet were taken as early as 2004 by a different telescope.

“The only way to improve a product like this, where the user experience is so much different than anything anyone has seen before, is to have people like you using the product and doing exactly what you all are doing,” the company said. “We know we must build this in the open with the community; this can’t be done solely in the lab.