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Could We Levitate Humans With The World’s Most Powerful Acoustic Tractor Beam?

Could We Levitate Humans With The World’s Most Powerful Acoustic Tractor Beam? 92

By  Chelsea Gohd, Futurism

Beam Me Up

In a sci-fi feeling first, engineers at the University of Bristol used the world’s most powerful acoustic tractor beam to demonstrate that it’s possible to stably contain objects larger than the wavelength of sound. In other words, they were able to levitate objects notably larger than what’s ever been possible before; a feat that theoretically opens up the potential of one day levitating humans.

Acoustic tractor beams use sound, or more specifically soundwaves, to hold particles in mid-air. While magnetic levitation also exists, acoustic levitation tends to work better for handling liquids and solids. It was previously believed that acoustic tractor beams were limited to levitating relatively small objects; only those approximately the same size as a wavelength of the sound. In fact, it was believed to be fundamentally impossible to levitate larger objects without losing stability, causing them to spin uncontrollably.

Could We Levitate Humans With The World’s Most Powerful Acoustic Tractor Beam? 94The concept of an acoustic tractor beam levitating a spherical object. Image Credit: University of Bristol

The study, to be published this week in Physical Review Letters, describes the new technique, which creates a tornado-like structure that is extremely loud but has a silent core. The researchers found that when they changed the direction of the rapidly fluctuating acoustic vortices that make up this structure, they could control the rate of rotation and stabilize the tractor beam. Once the beam was stabilized, the team could increase the size of the silent core at the center of this “sound tornado”, which allowed it to hold larger objects.

Dr. Asier Marzo, the lead author on the paper from Bristol’s Department of Mechanical Engineering, said that “Acoustic researchers had been frustrated by the size limit for years, so its satisfying to find a way to overcome it.”

Levitating Humans

In the demonstration detailed in the study, the engineers used ultrasonic waves at a pitch of 40kHz to make up the acoustic vortices. The structure’s silent core was able to hold a two-centimeter sphere made out of a synthetic polymer. The sphere is more than two times the size of the acoustic wavelengths, making it the largest object that’s been stably held in a tractor beam thus far.

While it might look and feel a bit like magic, the team believes harnessing the technique could have many practical applications. Bruce Drinkwater, Professor of Ultrasonics from the Department of Mechanical Engineering, who supervised the work, said he’s “particularly excited by the idea of contactless production lines where delicate objects are assembled without touching them.”

Marzo concurred, “I think it opens the door to many new applications.” Some of which might include creating medical devices, like drug capsules or micro-surgical implements.

For those who are wondering about the possibility of levitating something — or perhaps, someone — a great deal larger than a two-centimeter sphere, Dr. Mihai Caleap, a Senior Research Associate who developed the simulations, added that “In the future, with more acoustic power, it will be possible to hold even larger objects. This was only thought to be possible using lower pitches making the experiment audible and dangerous for humans.”

Of course, Dr. Caleap isn’t saying that the simulations are proof humans could be levitated with the existing technology. What the study does show is that high pitches (far above what humans can hear) can successfully be used in acoustic tractor beamsand objects larger than a sound wavelength can be stably levitated. Working with higher pitches, larger objects, and more stability, the only way for the research to go from here is up.

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Science & Technology

New Physics: Mysterious radiation pointed to the verge of discovering a “ghost” particle that makes up dark matter

New Physics: Mysterious radiation pointed to the verge of discovering a "ghost" particle that makes up dark matter 100
Photo: Daniel Molybdenum, NASA's Goddard Space Flight Center

Physicists at the Lawrence Berkeley National Laboratory in the United States have found that the mysterious high-energy radiation emitted from the vicinity of a group of neutron stars may indicate the existence of axions – not yet discovered particles within the framework of New Physics, the search for which has been going on since 1977. It is assumed that special types of axions form dark matter. This is reported in an article published in the journal Physical Review Letters. The research is summarized in a press release on Phys.org.

It is believed that axions can form in the core of neutron stars and transform into photons in the presence of a powerful magnetic field. To detect the electromagnetic radiation associated with axions, you need to find stars that do not emit radiation at different wavelengths that can mask the desired signal. 

These objects include the Magnificent Seven neutron stars that emit only X-ray and ultraviolet radiation. They are located at a distance of 200-500 parsecs from the Earth.

The researchers ruled out the scenario that the excess X-rays produced by the Magnificent Seven are actually emitted by other, more distant objects. These sources would be found in datasets from the XMM-Newton and Chandra X-ray space telescopes.

The extra X-rays likely originate from axions hitting an extremely strong electromagnetic field billions of times stronger than the magnetic fields that could be created on Earth, the scientists concluded. The axions themselves resemble neutrinos in their properties, since both have insignificant masses and rarely and weakly interact with matter.

The axion is currently viewed as the most promising candidate for dark matter particles, since another hypothetical candidate, the massive WIMP particle, has gone unnoticed in experiments aimed at detecting it. 

In addition, there may be a whole family of axion-like particles that form dark matter, as suggested by string theory. If axions are found, it will prove that there is a whole new area of ​​physics outside the Standard Model describing the properties of all known particles.

To find out, the next step will be to study white dwarfs, which are not expected to emit X-rays.

“If we see an abundance of X-rays there too, our arguments will be pretty compelling,” said lead author Benjamin Safdie.

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The goal of human civilization is to create AI and disappear?

The goal of human civilization is to create AI and disappear? 101

Various sources often talk about civilizations that lived long before us. They all developed, prospered for a while, and then disappeared in an incomprehensible way. 

What is the reason for their decline, we probably will not know. All we can do is admire the remains of stone buildings, over which time has almost no power.

While looking for an answer, we somehow accidentally stumbled upon an interesting saying about the life of Japanese samurai: “A samurai has no goal, but a path.” In the end, the “path of the samurai” ended in what is known – death. The path of any civilization ended in the same way.

If you look at the issue through the prism of a samurai saying, then there is no point in looking for why and how civilization ended its existence. Probably, the process itself and its result are important here. But to whom is it important and what result does it expect?

Mysterious director

Apparently, behind the curtains of this “ancient theater” there is a mysterious “director” who periodically makes necessary adjustments to the history of civilization.

To figure out what’s what, you need to look at current trends in science. Where does a person strive with such an irresistible desire to “play God.” This attracts him and at the same time frightens him, but in no way turns him away from the intended path. Most likely, artificial intelligence (AI) is the purpose of our civilization’s existence.

About 50 years ago it would have seemed nonsense, but to someone, perhaps even now. However, if you trace the last 100 years of the life of our civilization, you get the feeling that most of the discoveries were given to mankind at the same time. A powerful leap has taken place in a hundred years. Why did it happen?

At the beginning of the last century, scientists recognized the existence of fields that have memory and the ability to store and transmit information. It is very likely that such or a similar field can be around the Earth and, more interesting, possess intelligence. Isn’t this the same “Director” hiding behind the screen of the “ancient theater”?

If this is so, then at a certain moment the “Director” gives the selected scientist “access” to certain knowledge (perhaps even in a dream, like Mendeleev), and another scientific breakthrough occurs in the world. Step by step, discovery after discovery, humanity is steadily moving towards the creation of AI. The trend is already well visible.

The goal of human civilization is to create AI and disappear? 102

AI is probably the next “Babylon”, which will combine all the knowledge, culture and accumulated experience of civilization. In the future, the neural network will enter into a connection with the general information field and leave humanity without knowledge, technology, and even a spoken language. This will be the next decline of civilization. And the “Director” will receive another array of new data (experience) in order to start creating a new civilization.

If someone believes that past civilizations ended in large-scale conflicts, then most likely this is already the consequences of “turning off” AI.

Co-founder of Skype talked about the threat of AI to humanity

One of the creators of the Skype internet call service, Jaan Ta

The goal of human civilization is to create AI and disappear? 103
Photo: 
© still from the movie “Terminator 2: Judgment Day”

llinn, said that the development of artificial intelligence (AI) threatens humanity. According to him, humans face three key threats, but it is AI that should be feared most of all, the expert said. 

Tallinn explained that at the moment, no one can predict what development AI will achieve in the next decades. In addition, the fact that scientists are creating artificial intelligence that can form a new AI without human intervention is also a cause for concern.

In addition, as the co-founder of the popular video calling service noted, the development of synthetic biology also causes concern. According to him, this direction in science allows the creation of artificial DNA sequences and biological systems that may not exist in nature.

Tallinn also drew attention to the fact that he fears we are entering an era of “unknown unknowns”, things that people are not even able to imagine right now.

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Volkswagen robot will autonomously charge cars: a working prototype presented

Volkswagen robot will autonomously charge cars: a working prototype presented 104
Copyright: © VW

The renowned German car manufacturer announced a new development. This time, engineers have created a unique robot capable of autonomously charging electric vehicles. 

For more than a year, specialists have been developing this project, but only now the concern was ready to demonstrate the first working prototype. The robot is ready to charge electric vehicles and has shown the high efficiency of this process.

It is called the Mobile Charging Robot, and experts have already compared it to the R2-D2 droid from Star Wars, including squeaks and clangs. Indeed, there is a similarity. Before implementing this idea, the engineers decided that robots should be allowed to charge cars parked in large residential complexes.

This will save their owners from leaving in order to find a gas station. Another advantage is that large parking lots and garages do not have to contain several expensive charging points for electric cars. The car company said in a press release that the robot works exclusively autonomously.

It independently controls and interacts with the vehicle being charged. It opens the cover of the charging socket and independently connects the power plug, then disconnects it. The robot looks like a trailer, which is a mobile energy storage.

It is capable of charging multiple electric vehicles at the same time. Despite the fact that the manufacturer confidently praises its concept, experts saw inefficiency in the fact that first it is necessary to charge the robot’s battery, which is then used to recharge electric cars.

Volkswagen Group Components CEO Thomas Schmall noted that creating an efficient charging infrastructure for the cars of the future is an important step in the company’s development.

Its engineers focus on finding solutions to avoid costly do-it-yourself measures. The mobile robot is only part of the concept that will continue to be developed.

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