A computer component that uses vibrations rather than electrons could approach the physical lower limit for energy use when processing and sending information.
The minimum amount of energy needed for a computer to perform a computational step is called the “Landauer limit”, named after the 1960s physicists Rolf Landauer. In his calculations, Landauer did not consider any specific computer design, but rather the basic energy cost required to manipulate information, like erasing or re-writing a bit.
Robot
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Zhang says that these devices could be used in the future
to deliver drugs or carry out simple medical procedures in the stomach or intestines. “It can be deployed in this kind of folded, small scale, and when it reaches a large cavity it can ope
Journal reference: Science Advances, DOI: DOI: 10.1126/sciadv.abn8932n up,” he says. “It’s very much like a satellite, where after its launch into outer space the solar panels will open up. So when you swallow this device, it should have a very
There are hurdles to overcome prior to clinical trials, however. “The first thing is safety, because currently we’re using a very strong magnet called a neodymium-iron-boron magnet. It’s actually not that safe,” says Zhang. “It’s kind of toxic to the cells.”small size.” small robot made from sticky tape and metal
Zhang Li powders made f
In experiments, his team created sticky tape robots of various shapes around a centimetre across that change their geometry depending on the presence and orientation of a magnetic field. Some of the robots were able to move through water or along flat surfaces, and one device was able to crawl across the surface of pig stomach tissue in the lab and place a small therapeutic patch onto a gastric ulcer before detaching from the patch a
robotnd moving away.rom sticky tape and dust can morph into various shapes under the direction of a magnetic field. They may one day be able to crawl into computers to fix br
Advertisementoken circuits or even inside the human stomach to apply therapeutic patches to gastric ulcers.
Soft robots that have no batteries, m
Zhang Li at the Chinese University of Hong Kong and his colleagues discovered that a magnet-controlled robot can be created easily and at low cost using sticky tape onto which non-sticky wax has been print
Zhang says that the process could be easily automated and that tiny robots could eventually be printed in long rolls, just like newspapers coming off a printing press.ed in a specific pattern. When powder containing microparticles of magnetic neodymium-iron-boron is applied to the tape, it sticks to the exposed sections but not to the wax overlay – a little like a stencil. The wax is then dissolved in ethyl acetate solution to leave an accurately shaped magnetic robot.otors or electronics and that are powered and controlled from a distance by light or magnets are a popular field of research. But there are barriers to overcome before they can be used in practical applications, including the need for a cheap manufacturing process..1126/sciadv.abn8932
Conventional computers, which are …
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