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Jun 14, 2019

Better Memory Through Electrical Brain Ripples

Posted by in category: neuroscience

A study in mice shows improved cognitive performance when these bursting signals move around memory circuits.

  • By Simon Makin on June 14, 2019

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Jun 14, 2019

Wild New Discovery Shows How We Can Switch Majorana Fermions On And Off

Posted by in categories: computing, particle physics, quantum physics

The particle known as a Majorana fermion is as mysterious and uncontrollable as it is unique. It’s the only known particle that is also its own antiparticle, and has properties that make it an alluring candidate for qubits, the basic unit of information in a quantum computer.

Harnessing that potential, however, is easier said than done — Majorana fermions are slippery little suckers. But a team of particle physicists now reports they’ve found a way to control them.

“We now have a new way to engineer Majorana quasiparticles in materials,” said physicist Ali Yazdani of Princeton University. “We can verify their existence by imaging them and we can characterise their predicted properties.”

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Jun 14, 2019

These Are The Most Helpful Exoskeletons

Posted by in category: cyborgs

Click on photo to start video.

These 7 exoskeletons are making the world easier to navigate.

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Jun 14, 2019

Graphene (With a Twist) Is Helping Scientists Understand Superconductors

Posted by in categories: nuclear energy, particle physics

Layers a single atom thick are naturally lightweight, yet also surprisingly tough and flexible. This led to initial speculation for graphene being used as the ideal building material or protective body armor of the future. Yet it is the electrical properties of graphene, which arise from the unique behavior of electrons in such a thin layer, that have led to the first use cases for graphene in sensors and LEDs. Superconductivity, on top of everything else, is the icing on the cake for this remarkable material.

A Physicist’s Playground

Of course, twisted bilayer graphene (TBG) is not the first substance to exhibit superconducting properties. Superconductors, which can, amongst other things, generate extremely high magnetic fields without losing energy to electrical resistance, are already widely in use. Striking examples include the magnets at ITER, the world’s largest fusion device, currently under construction.

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Jun 14, 2019

Slug Saves Satellite Cells from Senescence

Posted by in category: biotech/medical

In a new study, researchers have found that the zinc-finger transcription factor Slug is responsible for repressing p16Ink4a, a compound that promotes senescence in human tissue. The researchers suggest that Slug is worth exploring as a treatment for sarcopenia [1].

Satellite cells

Satellite cells are specialized stem cells that form new muscle cells when the muscle is injured [2]. Populations of satellite stem cells remain quiescent in normal muscle tissue, only becoming activated through physical damage of some sort. This allows the tissue to heal properly, restoring function and allowing for natural regeneration. However, in both humans and mice, old age leads to increased p16Ink4a, which causes defects in this regeneration [1].

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Jun 14, 2019

Superbug gene that resists “last resort” antibiotics detected in US for the first time

Posted by in category: biotech/medical

Antibiotics were one of the most important scientific developments of the 20th century, helping to easily control bacterial infections and make previously life-threatening procedures and illnesses safe. But inversely, they might also be one of the biggest medical issues of the 21st century, as bacteria evolve resistances to our best drugs. Now, a bacterial gene that grants resistance to “last resort” antibiotics has been detected in a patient in the US, for the first time.

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Jun 14, 2019

Revealing ‘hidden’ phases of matter through the power of light

Posted by in categories: materials, particle physics

Most people think of water as existing in only one of three phases: Solid ice, liquid water, or gas vapor. But matter can exist in many different phases—ice, for example, has more than ten known phases, or ways that its atoms can be spatially arranged. The widespread use of piezoelectric materials, such as microphones and ultrasound, is possible thanks to a fundamental understanding of how an external force, like pressure, temperature, or electricity, can lead to phase transitions that imbue materials with new properties.

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Jun 14, 2019

Origins of Saturn’s rings are uncovered thanks to NASA’s Cassini probe

Posted by in categories: particle physics, space

Exactly how and when the Saturn’s rings formed is an issue that has fascinated astronomers and planetary scientists for centuries.

The rings are made mostly of particles of water ice that range in size from smaller than a grain of sand to as large as mountains.

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Jun 14, 2019

India hopes to become fourth country on the moon in September

Posted by in category: space travel

The mission will make India the fourth country to land a spacecraft on the surface of the Moon, adding its name to a long list of recent achievements in space exploration. In the past 10 years, the Indian space agency has launched multiple missions into space to gain a better understanding of Mars and the Moon.

India’s space agency says it will make the country’s first landing on the surface of the moon in September this year.

The country’s latest lunar mission, Chandrayaan-2, which means “moon vehicle” in Sanskrit, is to lift off in mid-July.

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Jun 14, 2019

Lunar-Polar Propellant Mining Outpost (LPMO): Affordable Exploration and Industrialization

Posted by in categories: energy, space

The Lunar Polar Gas-Dynamic Mining Outpost (LGMO) (see quad chart graphic) is a breakthrough mission architecture that promises to greatly reduce the cost of human exploration and industrialization of the Moon. LGMO is based on two new innovations that together solve the problem of affordable lunar polar ice mining for propellant production. The first innovation is based on a new insight into lunar topography: our analysis suggests that there are large (hundreds of meters) landing areas in small (0.5−1.5 km) nearpolar craters on which the surface is permafrost in perpetual darkness but with perpetual sunlight available at altitudes of only 10s to 100s of meters. In these prospective landing sites, deployable solar arrays held vertically on masts 100 m or so in length (lightweight and feasible in lunar gravity) can provide nearly continuous power.

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