Japanese scientists invent floating ‘firefly’ light

Researchers have already made a prototype “micro-size reading light,” which roams above a book. (Courtesy University of Tokyo)
Updated 23 February 2018
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Japanese scientists invent floating ‘firefly’ light

TOKYO: Japanese engineering researchers say they have created a tiny electronic light the size of a firefly which rides waves of ultrasound, and could eventually figure in applications ranging from moving displays to projection mapping.
Named Luciola for its resemblance to the firefly, the featherweight levitating particle weighs 16.2 mg, has a diameter of 3.5 mm (0.14 inch), and emits a red glimmer that can just about illuminate text.
But its minuscule size belies the power of the 285 microspeakers emitting ultrasonic waves that hold up the light, and have a frequency inaudible to the human ear, allowing Luciola to operate in apparent total silence.
It took two years for Luciola to get this far, said circuit design specialist Makoto Takamiya, a member of the Kawahara Universal Information Network Project that developed the device.
“Ultimately, my hope is that such tiny objects will have smartphone capabilities and be built to float about helping us in our everyday lives in smarter ways,” said the University of Tokyo professor, who hopes it will be commercially viable in five to 10 years.
The developers expect Luciola to find applications in the so-called Internet of Things, in which regular objects, such as cars, or domestic appliances such as air-conditioners, are connected to networks to send and receive data.
Equipped with movement or temperature sensors, Luciola could fly to such objects to deliver a message or help to make moving displays with multiple lights that can detect the presence of humans, or participate in futuristic projection mapping events.
The Kawahara Universal Information Network Project is a government-funded program that is part of the Japan Science and Technology Agency and explores advances in information and communication technology.


Fall of top US scientists points to ethics gap in research

In this Dec. 6, 2016 file photo, Brian Wansink speaks during an interview in the produce section of a supermarket in Ithaca, N.Y. (AP)
Updated 24 September 2018
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Fall of top US scientists points to ethics gap in research

  • Links between a doctor leading a clinical trial and manufacturers of drugs or medical equipment used in the study can influence the methodology and ultimately the results

WASHINGTON: Three prominent US scientists have been pushed to resign over the past 10 days after damning revelations about their methods, a sign of greater vigilance and decreasing tolerance for misconduct within the research community.
The most spectacular fall concerned Jose Baselga, chief medical officer at Memorial Sloan Kettering Cancer Center in New York. He authored hundreds of articles on cancer research.
Investigative journalism group ProPublica and The New York Times revealed on September 8 that Baselga failed to disclose in dozens of research articles that he had received millions of dollars from pharmaceutical and medical companies.
Such declarations are generally required by scientific journals.
Links between a doctor leading a clinical trial and manufacturers of drugs or medical equipment used in the study can influence the methodology and ultimately the results.
But journals don’t themselves verify the thoroughness of an author’s declarations.
Caught up in the scandal, Baselga resigned on September 13.

Next came the case of Brian Wansink, director of the Food and Brand Lab at the prestigious Cornell University.
He made his name thanks to studies that garnered plenty of media attention, including on pizza, and the appetites of children.
His troubles began last year when scientific sleuths discovered anomalies and surprisingly positive results in dozens of his articles.
In February, BuzzFeed published messages in which Wansink encouraged a researcher to extract from her data results more likely to go “viral.”
After a yearlong inquiry, Cornell announced on Thursday that Wansink committed “academic misconduct in his research and scholarship,” describing a litany of problems with his results and methods.
He is set to resign at the end of the academic year, but from now on will no longer teach there.
Wansink denied all fraud, but 13 of his articles have already been withdrawn by journals.
In the final case, Gilbert Welch, a professor of public health at Dartmouth College, resigned last week.
The university accused him of plagiarism in an article published in The New England Journal of Medicine, the most respected American medical journal.

“The good news is that we are finally starting to see a lot of these cases become public,” said Ivan Oransky co-founder of the site Retraction Watch, a project of the Center for Scientific Integrity that keeps tabs on retractions of research articles in thousands of journals.
Oransky told AFP that what has emerged so far is only the tip of the iceberg.
The problem, he said, is that scientists, and supporters of science, have often been unwilling to raise such controversies “because they’re afraid that talking about them will decrease trust in science and that it will aid and abet anti-science forces.”
But silence only encourages bad behavior, he argued. According to Oransky, more transparency will in fact only help the public to better comprehend the scientific process.
“At the end of the day, we need to think about science as a human enterprise, we need to remember that it’s done by humans,” he said. “Let’s remember that humans make mistakes, they cut corners, sometimes worse.”
Attention has long focused on financial conflicts of interest, particularly because of the influence of the pharmaceutical industry.
But the Wansink case illustrates that other forms of conflict, including reputational, are equally important. Academic careers are largely built on how much one publishes and in which journals.
As a result, researchers compete to produce positive, new and clear results — but work that produces negative results or validates previous findings should also be rewarded, argued Brian Nosek, a professor of psychology at the University of Virginia who heads the pro-transparency Center for Open Science.
“Most of the work when we’re at the boundary of science is messy, has exceptions, has things that don’t quite fit,” he explained, while “the bad part of the incentives environment is that the reward system is all about the result.”
While moves toward more transparency have gathered momentum over the past decade, in particular among publishers of research articles, there is still a long way to go, said Nosek.
“Culture change is hard,” he argued, adding: “Universities and medical centers are the slowest actors.”