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Skoltech scientists modeled the behavior of nanobubbles appearing in van der Waals heterostructures and the behavior of substances trapped inside the bubbles. In the future, the new model will help obtain equations of state for substances in nano-volumes, opening up new opportunities for the extraction of hydrocarbons from rock with large amounts of micro-and nanopores. The results of the study were published in the Journal of Chemical Physics.

The van der Waals nanostructures hold much promise for the study of tiniest samples with volumes from 1 cubic micron down to several cubic nanometers. These atomically thin layers of two-dimensional materials, such as graphene, hexagonal boron nitride (hBN) and dichalcogenides of transition metals, are held together by weak van der Waals interaction only. Inserting a sample between the layers separates the upper and bottom layers, making the upper layer lift to form a nanobubble. The resulting structure will then become available for transmission electron and atomic force microscopy, providing an insight into the structure of the substance inside the bubble.

The properties exhibited by substances inside the van der Waals nanobubbles are quite unusual. For example, water trapped inside a nanobubble displays a tenfold decrease in its dielectric constant and etches the diamond surface, something it would never do under normal conditions. Argon which typically exists in liquid form when in large quantities can become solid at the same pressure if trapped inside very small nanobubbles with a radius of less than 50 nanometers.

Insights into how minute, yet powerful, bubbles form and collapse on underwater surfaces could help make industrial structures such as ship propellers more hardwearing, research suggests.

Supercomputer calculations have revealed details of the growth of so-called nanobubbles, which are tens of thousands of times smaller than a pin head.

The findings could lend valuable insight into damage caused on industrial structures, such as pump components, when these bubbles burst to release tiny but powerful jets of liquid.

I’ve finally finished my gauss rifle! This is about four months in the making. I may improve on it in the future, or build an entirely new and better one! But I want to take a break from coil guns for a while.

Disclaimer:
I’d consider myself to be a pacifist, and don’t intend to use this on any person or animal. This project has merely acted as an outlet for my interest in electronics and electromagnetism. My aim has also been to create something cool to get others interested in science and engineering.

Continue reading “My 1.5KJ Home-Built Gauss Rifle!” »

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Do humanoid robots have a future? As Elon Musk demonstrates a humanoid robot, we explore Engineered Arts — a humanoid robot factory with the creator of a highly realistic looking robot. Experts analyse Musk’s proposals so far, looking at how these robots could become a reality.

#humanoid #humanoidrobot #robotics #robot #technology #tech.

Continue reading “Will Tesla’s Optimus robot become a reality? | FT Tech” »

The science fiction icon who coined and popularized the term “metaverse” is pausing his literary career to build his own.

As revealed by Wired, “Snow Crash” author and cyberpunk pioneer Neal Stephenson is working with a crypto bro to create an open metaverse platform that will, its creators hope, be a more decentralized version of the types of Big Tech metaverses like those run by Fortnite and Facebook.

“It’s like Neal is coming down out of the mountains like Gandalf, to restore the metaverse to an open, decentralized, and creative order,” said robotics and augmented reality entrepreneur Rony Abovitz, who is also acting as a strategic advisor to Lamina1, the company Stephenson is cofounding with Bitcoin Foundation head Peter Vessenes.

Since the beginning of human storytelling, enhancing oneself to a “better version” was of vital interest to humans. A twenty-first century-philosophical movement called transhumanism dedicated itself to the topic of enhancement. It unites discussions from several disciplines, e.g. philosophy, social science, and neuroscience, and aims to form human beings in desirable ways with the help of science and technology (Bostrom, 2005; Loh, 2018; More, 2013). Enhancement is the employment of methods to enhance human cognition in healthy individuals (Colzato et al., 2021), thereby extending individual performance above already existing abilities. It should thus be distinguished from therapy, which is the application of methods to help individuals with illnesses or dysfunctions in restoring their abilities (Viertbauer & Kögerler, 2019). Although enhancement methods bear psychological implications, there is hardly any psychological research on them. However, as the use of enhancement methods has increased (Leon et al., 2019; McCabe et al., 2014), and with it the demand for official guidelines (Jwa, 2019), it is necessary to examine who would use these methods in the first place, especially because these technologies can easily be misused. Investigating personality traits and values of individuals who want to enhance themselves could not only support suppliers and manufacturers of enhancement technologies in creating guidelines for using enhancement, but also raise more general awareness on which individuals might be in favour of enhancement.

In previous studies investigating the intersection between enhancement and personality traits or values, vignettes were used to describe enhancement methods and to measure their acceptance among participants (e.g. Laakasuo et al., 2018, 2021). Thus, subjects were asked to read scenarios involving the use of a certain enhancement method and then—as a measure of acceptance—judge aspects (e.g. the morality) of the action undertaken in the corresponding scenario (e.g. Laakasuo et al., 2018, 2021). In the present study, we followed a similar vignette-based approach with a variety of different enhancement methods to investigate the link between the acceptance of enhancement (i.e., the willingness to use enhancement methods, hereinafter termed AoE), personality traits, and values. More specifically, we examined the acceptance of the most discussed cognitive enhancement methods: pharmacological enhancement, brain stimulation with transcranial electrical stimulation and deep brain stimulation, genetic enhancement, and mind upload (Bostrom, 2003; Dijkstra & Schuijff, 2016; Dresler et al., 2019; Gaspar et al., 2019; Loh, 2018).

Pharmacological enhancement has received much attention in the media and literature (Daubner et al., 2021; Schelle et al., 2014) and is defined as the application of prescription substances that are intended to ameliorate specific cognitive functions beyond medical indications (Schermer et al., 2009). The best-known drugs for cognitive enhancement are methylphenidate (Ritalin®), dextroamphetamine (Adderall®), and modafinil (Provigil®), which are usually prescribed for the treatment of clinical conditions (de Jongh et al., 2008; Mohamed, 2014; Schermer et al., 2009).

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Russia’s war on Ukraine has turned a lot of assumptions about the fundamental nature and trajectory of how wars are fought, on its head.

For one thing, Ukraine’s strong defense has upended conventional wisdom about big powers being able to violate at will the sovereignty of little powers.

Continue reading “How drones, crypto, and satellites are changing the face of war / Thomas Frey & Trent Fowler” »