Best News Network

Nickel oxide is a material that can ‘learn’ like animals and could help further AI research

Nickel oxide is a material that can 'learn' like animals and could help further artificial intelligence research
Nickel oxide, the gray-and-black-striped material, demonstrates unique properties when exposed to hydrogen. Credit: Purdue University/Kayla Wiles, CC BY-ND

A unique material, nickel oxide demonstrates the ability to learn things about its environment in a way that emulates the most basic learning abilities of animals, as my colleagues and I describe in a new paper.

For over half a century, neuroscientists have studied sea slugs to understand basic animal learning. Two fundamental concepts of learning are habituation and sensitization. Habituation occurs when an organism’s response to a repeated stimulus continuously decreases. When researchers first touch a sea slug, its gills retract. But the more they touch the slug, the less it retracts its gills. Sensitization is an organism’s extreme reaction to a harmful or unexpected stimulus. If researchers then shock a sea slug, it will retract its gills much more dramatically than when it was merely touched. This is sensitization.

Nickel oxide has features that are strikingly similar to this learning behavior. Instead of gills retracting, we measured the change in electrical conductivity of the material. The stimulus, instead of a finger poke, was repeatedly alternating the environment of the nickel oxide between normal air and hydrogen gas.

Nickel oxide is interesting because when you expose it to hydrogen gas, its crystalline structure subtly changes and more electrons become available to generate an electrical current. In our experiment, we kept switching between the hydrogen-only and regular air environments. You would expect the electrical conductivity to oscillate up and down directly in relation to the exposure to hydrogen or air. But just as with the sea slugs, the change in conductivity of the nickel oxide slowly went down the more we stimulated it. It got habituated to the hydrogen.

Nickel oxide is a material that can 'learn' like animals and could help further artificial intelligence research
When nickel oxide is alternately bathed in hydrogen gas and air, its behavior changes. Credit: Purdue University/Kayla Wiles, CC BY-ND

When we exposed the material to bright light or ozone, though, it rapidly changed its conductivity—the same way a slug will always respond dramatically to a small shock.

The ability to learn, remember or forget information as needed is a powerful skill for any animal or machine. So far, the vast majority of research in the field of artificial intelligence has focused on software-based approaches to machine learning, with far less effort dedicated to studying the learning abilities of materials.

At the center of these two related areas of research lies the field of brain-inspired computers. For intelligence to be encoded into hardware, scientists need semiconductors that can learn from past experience and adapt to dynamic environments in a physical way similar to that of neurons in animal brains. Our new research showing how nickel oxide demonstrates features of learning hints at how this or similar materials could serve as building blocks for computers of the future.

Nickel oxide is a material that can 'learn' like animals and could help further artificial intelligence research
The conductivity of nickel oxide stores information similarly to the way slugs learn. Credit: Purdue University/Kayla Wiles, CC BY-ND

Before such materials can be incorporated into computer chips there are some knowledge gaps that need to be addressed. For instance, it is not yet clear at what time scales a material needs to learn for it to be useful in electrical systems. How quickly does something need to learn or forget to be useful? Another unknown is how or whether it is possible to change the structure of nickel oxide to produce different learning behaviors.

Nickel oxide is a material that can 'learn' like animals and could help further artificial intelligence research
It is unclear whether nickel oxide itself can be used for computing, but the concepts at play could inspire further innovation. Credit: Purdue University/Erin Easterling, CC BY-ND

In addition to further experiments on the material itself, there are theoretical lessons to explore. Observations of collective behavior of animals in nature—such as bird flocks and schools of fish—have inspired researchers to develop fields of AI like swarm intelligence. In a similar fashion, the interesting collective motion of atoms and electrons in materials could inspire AI and hardware design in the future.

As new materials that can accommodate mobile atoms are discovered, I am optimistic we will see further breakthroughs that can bring researchers one step closer to designing computers that emulate animal brains.


Taking lessons from a sea slug, study points to better hardware for artificial intelligence


Provided by
The Conversation


This article is republished from The Conversation under a Creative Commons license. Read the original article.The Conversation

Citation:
Nickel oxide is a material that can ‘learn’ like animals and could help further AI research (2021, December 22)
retrieved 22 December 2021
from https://techxplore.com/news/2021-12-nickel-oxide-material-animals-ai.html

This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
part may be reproduced without the written permission. The content is provided for information purposes only.

Stay connected with us on social media platform for instant update click here to join our  Twitter, & Facebook

We are now on Telegram. Click here to join our channel (@TechiUpdate) and stay updated with the latest Technology headlines.

For all the latest Technology News Click Here 

 For the latest news and updates, follow us on Google News

Read original article here

Denial of responsibility! NewsAzi is an automatic aggregator around the global media. All the content are available free on Internet. We have just arranged it in one platform for educational purpose only. In each content, the hyperlink to the primary source is specified. All trademarks belong to their rightful owners, all materials to their authors. If you are the owner of the content and do not want us to publish your materials on our website, please contact us by email – [email protected]. The content will be deleted within 24 hours.