Scientists Develop New Sensor to Measure Stress

Scientists develop new sensor to measure stress. (Reuters)
Scientists develop new sensor to measure stress. (Reuters)
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Scientists Develop New Sensor to Measure Stress

Scientists develop new sensor to measure stress. (Reuters)
Scientists develop new sensor to measure stress. (Reuters)

Researchers at the California Institute of Technology (Caltech) have developed a wireless sweat sensor that can accurately detect levels of cortisol, a natural compound that is commonly thought of as the body's stress hormone.

According to the Phys.org website, the development of an inexpensive and accurate device for measuring cortisol could allow for more widespread and easier monitoring of stress but also of other conditions including anxiety and depression -- all of which are correlated with changes in cortisol levels.

The new sweat sensor is made of graphene, and includes a plastic sheet with tiny pores through which passes the sweat into highly sensitive units, which detect compounds that are only present in very small amounts in sweat, the German news agency reported.

Wei Gao, assistant professor of medical engineering at Caltech, said the sweat analysis time in the new sensor could be only a few minutes.

"Typically, a blood test takes at least one to two hours and requires stress-inducing blood draw. For stress monitoring, time is very important," he explained.

"We aim to develop a wearable system that can collect multimodal data, including both vital sign and molecular biomarker information," he says.



Humanoid Robot Says Not Aiming to 'Replace Human Artists'

A man faces the realistic artist" robot "Ai-Da" using artificial intelligence at a stand during the ITU AI for Good Global Summit in Geneva. Fabrice COFFRINI / AFP/File
A man faces the realistic artist" robot "Ai-Da" using artificial intelligence at a stand during the ITU AI for Good Global Summit in Geneva. Fabrice COFFRINI / AFP/File
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Humanoid Robot Says Not Aiming to 'Replace Human Artists'

A man faces the realistic artist" robot "Ai-Da" using artificial intelligence at a stand during the ITU AI for Good Global Summit in Geneva. Fabrice COFFRINI / AFP/File
A man faces the realistic artist" robot "Ai-Da" using artificial intelligence at a stand during the ITU AI for Good Global Summit in Geneva. Fabrice COFFRINI / AFP/File

When successful artist Ai-Da unveiled a new portrait of King Charles this week, the humanoid robot described what inspired the layered and complex piece, and insisted it had no plans to "replace" humans.

The ultra-realistic robot, one of the most advanced in the world, is designed to resemble a human woman with an expressive, life-like face, large hazel eyes and brown hair cut in a bob.

The arms though are unmistakably robotic, with exposed metal, and can be swapped out depending on the art form it is practicing.

Late last year, Ai-Da's portrait of English mathematician Alan Turing became the first artwork by a humanoid robot to be sold at auction, fetching over $1 million, said AFP.

But as Ai-Da unveiled its latest creation -- an oil painting entitled "Algorithm King", conceived using artificial intelligence -- the humanoid insisted the work's importance could not be measured in money.

"The value of my artwork is to serve as a catalyst for discussions that explore ethical dimensions to new technologies," the robot told AFP at Britain's diplomatic mission in Geneva, where the new portrait of King Charles will be housed.

The idea, Ai-Da insisted in a slow, deliberate cadence, was to "foster critical thinking and encourage responsible innovation for more equitable and sustainable futures".

'Unique and creative'

Speaking on the sidelines of the United Nations' AI for Good summit, Ai-Da, who has done sketches, paintings and sculptures, detailed the methods and inspiration behind the work.

"When creating my art, I use a variety of AI algorithms," the robot said.

"I start with a basic idea or concept that I want to explore, and I think about the purpose of the art. What will it say?"

The humanoid pointed out that "King Charles has used his platform to raise awareness on environmental conservation and interfaith dialog. I have aimed this portrait to celebrate" that, it said, adding: "I hope King Charles will be appreciative of my efforts."

Aidan Meller, a specialist in modern and contemporary art, led the team that created Ai-Da in 2019 with artificial intelligence specialists at the universities of Oxford and Birmingham.

He told AFP that he had conceived the humanoid robot -- named after the world's first computer programmer Ada Lovelace -- as an ethical arts project, and not "to replace the painters".

Ai-Da agreed.

There is "no doubt that AI is changing our world, (including) the art world and forms of human creative expression", the robot acknowledged.

But "I do not believe AI or my artwork will replace human artists."

Instead, Ai-Da said, the aim was "to inspire viewers to think about how we use AI positively, while remaining conscious of its risks and limitations".

Asked if a painting made by a machine could really be considered art, the robot insisted: "My artwork is unique and creative."

"Whether humans decide it is art is an important and interesting point of conversation."