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Archive for the ‘energy’ category: Page 117

Nov 19, 2015

‘Power Over Wi-Fi’ named one of the year’s game-changing technologies

Posted by in categories: electronics, energy, internet

University of Washington engineers have developed a novel technology that uses a Wi-Fi router—a source of ubiquitous but untapped energy in indoor environments—to power devices.

The Power Over Wi-Fi (PoWiFi) system is one of the most innovative and game-changing technologies of the year, according to Popular Science, which included it in the magazine’s annual “Best of What’s New” awards announced Wednesday.

The technology attracted attention earlier this year when researchers published an online paper showing how they harvested energy from Wi-Fi signals to power a simple temperature sensor, a low-resolution grayscale camera and a charger for a Jawbone activity tracking bracelet.

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Nov 12, 2015

Scientists develop ‘nanopores’ that inexpensively filter the salt out of seawater

Posted by in categories: energy, engineering, materials

There’s filtration and then there’s filtration. Engineers in the US have been working on the latter, coming up with a new markedly more energy-efficient way of taking the salt out of seawater, which could deliver huge advantages in terms of providing people with access to drinking water and help combat problems like drought.

The researchers have developed a material that allows high volumes of water to pass through extremely tiny holes called ‘nanopores’ while blocking salt and other contaminants. The material they’re using – a nanometre-thick sheet of molybdenum disulphide (MoS2) riddled with these nanopore holes – is the most efficient of a number of thin-film membranes that the engineers modelled, filtering up to 70 percent more water than graphene.

“Even though we have a lot of water on this planet, there is very little that is drinkable,” said Narayana Aluru, a professor of mechanical science and engineering at the University of Illinois and leader of the study. “If we could find a low-cost, efficient way to purify sea water, we would be making good strides in solving the water crisis.”

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Nov 8, 2015

Theory of a Mach Effect Thruster II

Posted by in categories: energy, information science, quantum physics, space travel

ABSTRACT

According to Einstein, General Relativity contains the essence of Mach’s ideas. Mach’s principle can be summarized by stating that the inertia of a body is determined by the rest of the mass-energy content of the universe. Inertia here arises from mass-energy there. The latter, was a statement made by John Wheeler in his 1995 book, Gravitation and Inertia, coauthored by Ciufolini. Einstein believed that to be fully Machian, gravity would need a radiative component, an action-at-a-dis- tance character, so that gravitational influences on a body from far away could be felt immediately. In 1960’s, Hoyle and Narlikar (HN) developed such a theory which was a gravitational version of the Absorber theory derived by Wheeler-Feynman for classical electrodynamics and later expanded upon by Davies and Narlikar for quantum electrodynamics. The HN-field equation has the same type of mass fluctuation terms as in the Woodward Mach effect thruster theory. The force equation, used to predict the thrust in our device, can be derived from the mass fluctuation. We outline a new method for deriving the force equation. We present new experimental tests of the thruster to show that the thrust seen in our device is not due to either heating or Dean Drive effects. Successful replications have been performed by groups in Austria and Canada, but their work is still pending in the peer review literature.

Keywords:

Mach Effect Drive, Transient Mass Fluctuations, Mach’s Principle, Action at a Distance, Advanced Waves, Event Horizon.

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Nov 8, 2015

Theory of a Mach Effect Thruster I

Posted by in categories: energy, information science, materials, space travel

ABSTRACT

The Mach Effect Thruster (MET) is a propellant―less space drive which uses Mach’s principle to produce thrust in an accelerating material which is undergoing mass―energy fluctuations, [1] –[3]. Mach’s principle is a statement that the inertia of a body is the result of the gravitational interaction of the body with the rest of the mass-energy in the universe. The MET device uses electric power of 100 — 200 Watts to operate. The thrust produced by these devices, at the present time, are small on the order of a few micro-Newtons. We give a physical description of the MET device and apparatus for measuring thrusts. Next we explain the basic theory behind the device which involves gravitation and advanced waves to incorporate instantaneous action at a distance. The advanced wave concept is a means to conserve momentum of the system with the universe. There is no momentun violation in this theory. We briefly review absorber theory by summarizing Dirac, Wheeler-Feynman and Hoyle-Narlikar (HN). We show how Woodward’s mass fluctuation formula can be derived from first principles using the HN-theory which is a fully Machian version of Einstein’s relativity. HN-theory reduces to Einstein’s field equations in the limit of smooth fluid distribution of matter and a simple coordinate transformation.

Keywords:

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Nov 6, 2015

Researchers have designed a battery that’s 90 percent more efficient than lithium-ion

Posted by in categories: electronics, energy, mobile phones

Smartphones, laptops, and all manner of electronics have advanced by leaps in bounds over the past few decades, but an essential component of most of them — the battery, or more precisely the lithium-ion battery — hasn’t. The technological remnant of the mid-’90s has a tendency to degrade and isn’t particularly efficient, which is why scores of researchers have spent years pursuing alternatives. Until now, though, practical limitations — i.e., physical dimensions and mass manufacturing constraints — have permanently relegated many to laboratories. But a new design, a refinement of so-called lithium-air design by scientists at the University of Cambridge, looks to be one of the most feasible yet.

Lithium-air (Li-air) batteries have been around for a while — chemist K. M. Abraham is credited with developing the first rechargeable variant in 1995 — but they’ve never been considered very practical. That’s because they use carbon as an electron conductor instead of the metal-oxide found in conventional Li-ion batteries, and generate electricity from the reaction of oxygen molecules and lithium molecules, a process which leads to the production of electrically resistant lithium peroxide. As the lithium peroxide builds up, the power-producing reaction diminishes until it eventually ceases completely.

Related: Why batteries suck, and the new tech that might supercharge them.

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Nov 5, 2015

Why NASA’s EmDrive Might Be the Most Exciting Breakthrough in Tech Right Now

Posted by in categories: energy, physics, space travel

Earthlings, meet the EmDrive, the rocket of the future.

Allegedly, Eagleworks Labs at NASA’s Johnson Space Center has defied a Newtonian law of physics and created a futuristic warp drive. If it’s real, it could be the most exciting breakthrough in space-travel technology to date: an engine that gets from point A to point B without using any fuel — and does it crazy fast.

Despite months of skepticism, our nation’s aerospace agency wants you to believe its latest findings are legit. Recent studies purportedly prove the EmDrive’s authenticity. Even NASA researcher Paul March hopped on a (non-NASA-affiliated) spaceflight forum to chat about the agency’s findings.

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Nov 2, 2015

The Active Sun: US Unveils Plan to Deal with Space Weather

Posted by in categories: energy, space

The U.S. government is getting more serious about dealing with the dangers posed by powerful sun storms.

On Thursday (Oct. 29), the White House released two documents that together lay out the nation’s official plan for mitigating the negative impacts of solar flares and other types of “space weather,” which have the potential to wreak havoc on power grids and other key infrastructure here on Earth.

The new “National Space Weather Strategy” outlines the basic framework the federal government will pursue to better understand, predict and recover from space-weather events, while the “National Space Weather Action Plan” details specific activities intended to help achieve this broad goal. [The Sun’s Wrath: Worst Solar Storms in History].

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Oct 31, 2015

Robots, Bioprinting, and the Future of Food [Video]

Posted by in categories: drones, energy, food, health, robotics/AI, singularity

Emerging technologies are shaking up how we grow food, distribute it, and even what we’re eating. We are seemingly on the cusp of a food revolution and undoubtedly, technologies including artificial intelligence will play a huge role in helping people grow healthier, more resilient food faster and with less energy than ever before.

Rob Nail, Singularity University’s CEO and Associate Founder, provides a few examples of how robotics, automation, and drones are transforming agriculture in this short video:

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Oct 29, 2015

This Building Doesn’t Need A/C: The Building Itself Is An Air Conditioner — By Ben Schiller | Fast Company

Posted by in categories: architecture, business, energy

“This ingenious cooling system circulates cooled air in an endless loop—all without any electricity.”

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Oct 29, 2015

Warp Factor 11 — ships powered by BLACK HOLES to “outpace Enterprise”, say scientists

Posted by in categories: cosmology, energy, food, space travel

The novel its a bit older, but it‘s an incredible vision!


When Star Trek’s Scotty warns the Captain that the engines can’t “take it”, he might just be best off switching fuel — a new book claims that humanity could reach the stars using vast spacecraft harnessing the energy of black holes with the power to “eat planets”.

Continue reading “Warp Factor 11 — ships powered by BLACK HOLES to ‘outpace Enterprise’, say scientists” »