(ORDO NEWS) — Scientists make discoveries almost every day, while smart companies create practical devices that help accelerate scientific progress. Our technical parade contains the loudest novelties: from protective masks-collars from coronavirus to futuristic blasters.
Breath of professionals
“Forget about the mask, breathe normally ,” Estonian startup Respiray advertises its development. In fact, such a device allows you to freely inhale and exhale even in a pandemic and with a mass gathering of citizens – at the checkouts of stores, in bank branches, during public speaking and presentations.
A transparent screen protects the face from accidental inhalation of non-disinfected air, and the flow for breathing comes from below, through the “collar”.
It passes through a set of filters that remove dust and small particles, is treated with long-wave (265 nm) ultraviolet light, which destroys viruses and bacteria, and only then is fed to the nostrils.
Studies conducted at the University of Tartu have shown that when passing through all levels of protection, the content of alpha virus particles in the air drops by 99.4%, and influenza – by 99.2%.
Built-in fans allow Respiray to pass and clean up to 55 liters of air per minute – 3-4 times more than a person needs in a calm state.
In 2020, Cleo Robotics introduced the Dronut, a shock-resistant drone designed to inspect premises where it is impossible to rely on GPS signals, and every careless movement is fraught with a collision.
Previously, the drone was supplied only to the military and law enforcement, but now sales of the civilian version of the Dronut X1, which is more compact, quieter and cheaper – “only” $ 9,800 apiece, have begun.
The device weighs 425 g and is made in the shape of a donut, the circumference of which protects the blades from accidental impacts. On board there is a set of lidars for navigation and cameras for broadcasting a video stream in 4K format.
Hot and fast
Having fallen on a hot surface, a drop of water immediately boils and slides on an air cushion of its own steam. This phenomenon is known as the Leidenfrost effect and has been well studied for a long time.
Theoretically, on a surface lubricated with hot and viscous oil, drops should roll more slowly. However, in reality, boiling droplets begin to move much faster. Shooting with a high-speed video camera that makes 100 thousand frames per second helped to explain what was happening.
It turns out that the oil envelops the drop in a thin layer, preventing the free evaporation of water. Pressure builds up inside until the oil shell breaks through and the drop “shoots” in a random direction, like a punctured balloon.
The same blaster used by Star Trek heroes Spock and Captain Kirk has gone under the hammer at the Heritage auction. The original exhibit first appeared in the third episode of the series, released in 1966, in the hands of actor William Shatner (Kirk) and has survived to this day in perfect condition.
The futuristic weapon was crafted by decorator Reuben Klamer from wood, aluminum and a pair of glass cylinders and is meticulously decorated with blaster adjustment buttons and even a serial number plate on the side.
And even if the device does not help in battles with a real opponent, we sincerely envy the new anonymous owner of a rarity that can become the pearl of any collection of fantastic and space artifacts. In the end, it’s just beautiful.
As planned by the creators of the series, Captain Kirk needed a weapon of “impressive size” – and the blaster is almost 88 cm long.
Lack of result
Dark matter remains one of the main mysteries of physics. Its influence on the dynamics of the cosmos is enormous, but it does not absorb, scatter or emit radiation, remaining not so much dark as invisible. You can only notice it by gravity – the only fundamental force through which dark matter manifests itself.
Hypothetical sterile neutrinos have long been among the candidates for “dark particles”. Calculations show that when they collide with atoms, they should generate secondary electrons, and signs of such a phenomenon were indeed found in experiments of past years.
However, more accurate observations, carried out within the framework of the MicroBooNE project for three years, ended at the end of 2021 with the complete absence of traces of sterile neutrinos. It seems that one candidate for dark matter has become less.
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