Archive for the ‘physics’ category: Page 231
Nov 21, 2018
Improbable Thruster Seems to Work by Violating Known Laws of Physics
Posted by Genevieve Klien in categories: energy, physics, satellites
Every action creates an equal and opposite reaction. It’s perhaps the best known law of physics, and Guido Fetta thinks he’s found a way around it.
According to classical physics, in order for something—like a spaceship—to move, conservation of momentum requires that it has to exert a force on something else. A person in roller skates, for example, pushes off against a wall; a rocket accelerates upward by propelling high-velocity combusted fuel downward. In practice, this means that space vessels like satellites and space stations have to carry up to half their weight in propellant just to stay in orbit. That bulks up their cost and reduces their useful lifetime.
Nov 21, 2018
Scientists find way to melt gold at room temperature
Posted by Genevieve Klien in category: physics
Melting gold normally requires temperatures upwards of 1,064° C (1,947° F), but physics is never quite that simple. A team of researchers has now found a way to melt gold at room temperature using an electric field and an electron microscope.
Nov 20, 2018
Computer scientists use artificial intelligence to boost an earthquake physics simulator
Posted by Genevieve Klien in categories: engineering, physics, robotics/AI
A team of researchers from the Earthquake Research Institute, Department of Civil Engineering and Information Technology Center at the University of Tokyo, and the RIKEN Center for Computational Science and RIKEN Center for Advanced Intelligence Project in Japan were finalists for the coveted Gordon Bell Prize for outstanding achievements in high-performance computing. Tsuyoshi Ichimura together with Kohei Fujita, Takuma Yamaguchi, Kengo Nakajima, Muneo Hori and Lalith Maddegedara were praised for their simulation of earthquake physics in complex urban environments.
Nov 20, 2018
Physicists Have a New Idea for Faster-Than-Light Travel
Posted by Genevieve Klien in categories: energy, physics
Scientists used to think a “warp bubble” would require an impractical amount of energy. That’s starting to change.
Nov 18, 2018
A New Discovery by the LHC Hints at Physics Beyond the Standard Model
Posted by Genevieve Klien in category: physics
Nov 18, 2018
NASA Image of Merging Galaxy Clusters Looks Suspiciously Like the USS Enterprise
Posted by Michael Lance in categories: physics, space travel
Two possibilities: Either the image captures two massive galactic clusters in the process of colliding, or NASA is covering up the existence of a starship so big it’s several million light years long.
Humanity’s current understanding of physics may suggest faster-than-light travel is impossible, but researchers here on Earth can still observe happening in places much too far away to ever actually visit (and generally only what they looked like in the distant past). One of them is a galactic collision that, at least from our planetary vantage point, looks an awful lot like a craft going where no man has ever gone before.
Nov 14, 2018
SC18: HPC Demand Surges, Accelerated
Posted by Klaus Baldauf in categories: physics, robotics/AI, supercomputing
NVIDIA’s playing a bigger role in high performance computing than ever, just as supercomputing itself has become central to meeting the biggest challenges of our time.
Speaking just hours ahead of the start of the annual SC18 supercomputing conference in Dallas, NVIDIA CEO Jensen Huang told 700 researchers, lab directors and execs about forces that are driving the company to push both into “scale-up” computing — focused on large supercomputing systems — as well as “scale-out” efforts, for researchers, data scientists and developers to harness the power of however many GPUs they need.
Nov 10, 2018
Gravitational waves could solve a cosmological crisis within five years—or shake physics to its core
Posted by Genevieve Klien in categories: physics, space
This could be the last decade that cosmologists debate how fast the universe is expanding.
Nov 8, 2018
Ripples in Space-Time Could Reveal the Shape of Wormholes
Posted by Genevieve Klien in categories: cosmology, physics
Wormholes — yawning gateways that could theoretically connect distant points in space-time — are usually illustrated as gaping gravity wells linked by a narrow tunnel.
But their precise shape has been unknown.
Now, however, a physicist in Russia has devised a method to measure the shape of symmetric wormholes — even though they have not been proven to exist — based on the way the objects may affect light and gravity. [8 Ways You Can See Einstein’s Theory of Relativity in Real Life].
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