Day: January 10, 2019

Deere Puts Spotlight on High-tech Farming 

It has GPS, lasers, computer vision, and uses machine learning and sensors to be more efficient. This is the new high-tech farm equipment from John Deere, which made its first Consumer Electronics Show appearance this week to highlight the importance of tech in farming. 

 

Deere brought its massive agricultural combine and GPS-guided tractor to the Las Vegas technology event, making the point that farming is more than sticking a finger up in the air to gauge the weather. 

 

The machines are guided by enhanced GPS data that, according to the company, is accurate to 1 inch (2.5 centimeters) — compared with 3 meters (10 feet) for conventional GPS. 

 

As they work the fields, the machines gather data about soil conditions and monitor how corn and other crops are being harvested to reduce waste and improve efficiency. 

 

“We want consumers to understand how food is grown,” said Deere marketing executive Deanna Kovar. “Not only is this machine harvesting the grain, it’s harvesting the data, which helps farmers make decisions for next year.” 

 

Kovar said the extra electronics add about $10,000 to the cost of the combine, which sells for close to $500,000, and that most buyers take the option. 

 

“You can get a savings of about one to three bushels per acre, so it pays for itself very quickly,” she said.

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Repeating Radio Waves From Deep Space Intrigue Scientists

Astronomers in Canada have detected a mysterious volley of radio waves from far outside our galaxy, according to two studies published Wednesday in Nature.

What corner of the universe these powerful waves come from and the forces that produced them remain unknown.

The so-called repeating fast radio bursts were identified during the trial run last summer of a built-for-purpose telescope running at only a fraction of its capacity.

Known by its acronym CHIME, the world’s most powerful radio telescope, spread across an area as big as a football pitch, is poised to detect many more of the enigmatic pulses now that it is fully operational.

“At the end of the year, we may have found 1,000 bursts,” said Deborah Good, a PhD student at the University of British Columbia and one of 50 scientists from five institutions involved in the research.

High energy bursts

Fast radio bursts (FRBs) flash only for a micro-instant, but can emit as much energy as the sun does in 10,000 years.

Exactly what causes these high-energy surges of long waves at the far end of the electromagnetic spectrum remains the subject of intense debate.

More than 60 bursts have been cataloged since 2007, but only one other, observed in 2012 at the Arecibo Observatory in Puerto Rico, was a repeater.

“FRBs, it seems, are likely generated in dense, turbulent regions of host galaxies,” Shriharsh Tendulkar, a corresponding author for both studies and an astronomer at McGill University, told AFP.

Cosmic convulsions created by the turbulent gas clouds that give rise to stars, or stellar explosions such a supernovae, are both possible incubators.

But consecutive radio bursts are a special case.

​No little green men

“The fact that the bursts are repeated rules out any cataclysmic models in which the source is destroyed while generating the burst,” Tendulkar added.

“An FRB emitted from a merger of two neutron stars, or a neutron star and a black hole, for example, cannot repeat.”

It is not yet clear whether the breeding grounds of repeating bursts are different from those that produce only a single radio pulse.

Significantly, the 2012 and 2018 “repeaters” have strikingly similar properties.

CHIME (Canadian Hydrogen Intensity Mapping Experiment) also spotted a dozen single burst radio waves, but with an unusual profile.

Most FRBs spotted so far have wavelengths of a few centimeters, but these had intervals of nearly a meter, opening up a whole new line of inquiry for astronomers.

Could these enigmatic radio pulses point to intelligence elsewhere in the Universe? Might they be messages in a bottle?

“It is extremely, extremely unlikely,” Tendulkar said.

“As a scientist I can’t rule it out 100 percent. But intelligent life is not on the minds of any astronomer as a source of these FRBs.”

Constructed in British Columbia, CHIME is composed of four, 100-meter long half-pipe cylinders of metal mesh, which reconstruct images of the sky by processing the radio signals recorded by more than a thousand antennas.

“This signal processing system is the largest of any telescope on Earth,” the researchers said in a communique.

The other institutions with leading roles are the University of Toronto, the National Research Council of Canada, and the Perimeter Institute.

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Study: Elderly, Conservatives Shared More Facebook Fakery in 2016 

People over 65 and ultraconservatives shared about seven times more fake information masquerading as news on Facebook than younger adults, moderates and super liberals during the 2016 election season, a new study found. 

 

The first major study to look at who is sharing links from debunked sites found that not many people were doing it. On average, only 8.5 percent of those studied — about 1 person out of 12 — shared false information during the 2016 campaign, according to the study in Wednesday’s issue of the journal Science Advances. But those doing it tended to be older and more conservative.

“For something to be viral, you’ve got to know who shares it,” said study co-author Jonathan Nagler, a politics professor and co-director of the Social Media and Political Participation Lab at New York University.  “Wow, old people are much more likely than young people to do this.” 

 

Battling back

Facebook and other social media companies were caught off guard in 2016 when Russian agents exploited their platforms to meddle with the U.S. presidential election by spreading fake news, impersonating Americans and running targeted advertisements to try to sway votes. Since then, the companies have thrown millions of dollars and thousands of people into fighting false information. 

 

Researchers at Princeton University and NYU in 2016 interviewed 2,711 people who used Facebook. Of those, nearly half agreed to share all their postings with the professors.  

The researchers used three different lists of false information sites — one compiled by BuzzFeed and two others from academic research teams — and counted how often people shared from those sites. Then to double check, they looked at 897 specific articles that had been found false by fact checkers and saw how often those were spread. 

 

All those lists showed similar trends. 

 

When other demographic factors and overall posting tendencies are factored in, the average person older than 65 shared seven times more false information than those between 18 and 29. The seniors shared more than twice as many fake stories as people between 45 and 64 and more than three times that of people in the 30-to-44-year-old range, said lead study author Andrew Guess, a politics professor at Princeton. 

 

The simplest theory for why older people share more false information is a lack of “digital literacy,” said study co-author Joshua Tucker, also co-director of the NYU social media political lab. Senior citizens may not tell truth from lies on social networks as easily as others, the researchers said. 

Signaling identity

 

Harvard public policy and communication professor Matthew Baum, who was not part of the study but praised it, said he thought sharing false information was “less about beliefs in the facts of a story than about signaling one’s partisan identity.” That’s why efforts to correct fakery don’t really change attitudes and one reason why few people share false information, he said. 

 

When other demographics and posting practices are factored in, people who called themselves very conservative shared the most false information, a bit more than those who identified themselves as conservative. The very conservatives shared misinformation 6.8 times more often than the very liberals and 6.7 times more than moderates. People who called themselves liberals essentially shared no fake stories, Guess said.  

Nagler said he was not surprised that conservatives in 2016 shared more fake information, but he and his colleagues said that did not necessarily mean that conservatives are by nature more gullible when it comes to false stories. It could simply reflect that there was much more pro-Donald Trump and anti-Hillary Clinton false information in circulation in 2016 that it drove the numbers for sharing, they said. 

 

However, Baum said in an email that conservatives post more false information because they tend to be more extreme, with less ideological variation than their liberal counterparts and they take their lead from Trump, who “advocates, supports, shares and produces fake news/misinformation on a regular basis.” 

 

The researchers looked at differences in gender, race and income but could not find any statistically significant differences in sharing of false information. 

 

Improvements

After much criticism, Facebook made changes to fight false information, including de-emphasizing proven false stories in people’s feeds so others were less likely to see them. It seems to be working, Guess said. Facebook officials declined to comment. 

 

“I think if we were to run this study again, we might not get the same results,” Guess said. 

 

The Massachusetts Institute of Technology’s Deb Roy, a former Twitter chief media scientist, said the problem is that the American news diet is “full of balkanized narratives” with people seeking information that they agree with and calling true news that they don’t agree with fake. 

 

“What a mess,” Roy said.

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