Scientists make it possible to 3D print your own sonic tractor beam

You can now, with some assembly, 3D print your very own tiny sonic tractor beam.

Thanks to the efforts of a research team at Bristol University, technology for a single-sided acoustic tractor beam has now been adapted to be printed and assembled by anyone with the inclination. The publically available specifications are based on the first single-sided acoustic tractor beam, developed last year.

The original technology was developed by Asier Marzo, then a doctoral student at the Public University of Navarre. The tractor beam, rather than using the long-possible sonic levitation to push objects around, functioned true to its name and was able to trap and pull objects using sound waves from only one direction.

Marzo, now a research assistant at the University of Bristol, led his team in changing the technology into something that anyone could produce. Their efforts, beyond adaptation, have resulted in the production of a fully detailed how-to video for the public and an open access paper in Applied Physics Letters that will lay out the results of their development work.

“Previously we developed a tractor beam, but it was very complicated and pricey because it required a phase array, which is a complex electronic system,” Marzo said. “In this paper, we made a simple, static tractor beam that only requires a static piece of matter.”

The principle change from the original technology to the new, more accessible version was the transition from an underlying complex structure that made use of expensive electronics to an architecture that produces the same results structurally rather than electronically. As the sound passes through these elements, the waves are shaped by the internal structure of the 3D printed material.

The sound wave is modulated using a metamaterial which consists of lots of tubes of varying lengths. After passing through said tubes, the sound has the correct phases to create the tractor beam. However, the team face difficulty in optimising this material design to allow common 3D printers to produce the same results as more precise instruments.

Beyond the simple appeal of owning your own tractor beam, the technology may have serious potential for studying low-gravity effects on biological samples. Microgravity research is already an emerging field of interest and the tractor beam may serve as an effective tool for furthering these studies.

“Recently there have been several papers about what happens if we levitate an embryo, how does it develop? Or what happens if we levitate bacteria?” Marzo said. “For instance, they discovered salmonella is three times more [virulent] when it’s levitated. Certain microorganisms react differently to microgravity.”

There are currently three designs of the tractor beam, each with a trapping profile suited to different object sizes as related to the wavelength of sound used. However, the team’s technology is still limited to objects around half the size of the wavelength. For practical frequencies, just above what humans can hear, this limits the current size of trappable objects to a few millimetres.

Robot takes first steps towards building artificial lifeforms

A robot equipped with sophisticated AI has successfully simulated the creation of artificial lifeforms, in a key first step towards the eventual goal of creating true artificial life.

The robot, which was developed by scientists at the University of Glasgow, was able to model the creation of artificial lifeforms using unstable oil-in-water droplets. These droplets effectively played the role of living cells, demonstrating the potential of future research to develop living cells based on building blocks that cannot be found in nature.

Significantly, the robot also successfully predicted their properties before they were created, even though this could not be achieved using conventional physical models.

The robot, which was designed by Glasgow University’s Regius Chair of Chemistry, Professor Lee Cronin, is driven by machine learning and the principles of evolution.

It has been developed to autonomously create oil-in-water droplets with a host of different chemical makeups and then use image recognition to assess their behaviour.

Using this information, the robot was able to engineer droplets to have different properties­. Those which were found to be desirable could then be recreated at any time, using a specific digital code.

“This work is exciting as it shows that we are able to use machine learning and a novel robotic platform to understand the system in ways that cannot be done using conventional laboratory methods, including the discovery of ‘swarm’ like group behaviour of the droplets, akin to flocking birds,” said Cronin.

“Achieving lifelike behaviours such as this are important in our mission to make new lifeforms, and these droplets may be considered ‘protocells’ – simplified models of living cells.”

One of the oil droplets created by the robot

The research, which is published today in the journal PNAS, is one of several research projects being undertaken by Cronin and his team within the field of artificial lifeforms.

While the overarching goal is moving towards the creation of lifeforms using new and unprecedented building blocks, the research may also have more immediate potential applications.

The team believes that their work could also have applications in several practical areas, including the development of new methods for drug delivery or even innovative materials with functional properties.

Mac spyware stole millions of user images

A criminal case brought against a man from Ohio, US has shed more light on a piece of Mac malware, dubbed Fruitfly, that was used to surreptitiously turn on cameras and microphones, take and download screenshots, log keystrokes, and steal tax and medical records, photographs, internet searches, and bank transactions from users.

Source: Ars Technica

Drone swarm attack strikes Russian military bases

Russia's Ministry of Defence claims its forces in Syria were attacked a week ago by a swarm of home-made drones. According to Russia's MoD Russian forces at the Khmeimim air base and Tartus naval facility "successfully warded off a terrorist attack with massive application of unmanned aerial vehicles (UAVs)"

Source: Science Alert

Las Vegas strip club employs robot strippers

A Las Vegas strip club has flown in robot strippers from London to 'perform' at the club during CES. Sapphire Las Vegas strip club managing partner Peter Feinstein said that he employed the robots because the demographics of CES have changed and the traditional female strippers aren’t enough to lure a crowd to the club anymore.

Source: Daily Beast

GM to make driverless cars without steering wheels or pedals by 2019

General Motors has announced it plans to mass-produce self-driving cars without traditional controls like steering wheels and pedals by 2019. “It’s a pretty exciting moment in the history of the path to wide scale [autonomous vehicle] deployment and having the first production car with no driver controls,” GM President Dan Ammann told The Verge.

Source: The Verge

Russia-linked hackers "Fancy Bears" target the IOC

Following Russia's ban from the upcoming 2018 Winter Olympics, the Russia-linked hacking group "Fancy Bears" has published a set of apparently stolen emails, which purportedly belong to officials from the International Olympic Committee, the United States Olympic Committee, and third-party groups associated with the organisations.

Source: Wired

Scientists discover ice cliffs on Mars

Using images provided by the Mars Reconnaissance Orbiter, scientists have described how steep cliffs, up to 100 meters tall, made of what appears to be nearly pure ice indicate that large deposits of ice may also be located in nearby underground deposits. The discovery has been described as “very exciting” for potential human bases.

Source: Science Mag