Lifeboat Foundation

Most basic physics textbooks describe laser light in fairly simple terms: a beam travels directly from one point to another and, unless it strikes a mirror or other reflective surface, will continue traveling along an arrow-straight path, gradually expanding in size due to the wave nature of light. But these basic rules go out the window with high-intensity laser light.

Powerful laser beams, given the right conditions, will act as their own lenses and “self-focus” into a tighter, even more intense beam. University of Maryland physicists have discovered that these self-focused laser pulses also generate violent swirls of optical energy that strongly resemble smoke rings. In these donut-shaped light structures, known as “spatiotemporal optical vortices,” the light energy flows through the inside of the ring and then loops back around the outside.

The vortices travel along with the laser pulse at the speed of light and control the energy flow around it. The newly discovered optical structures are described in the September 9, 2016 issue of the journal Physical Review X.

To defend against military lasers, Adsys Controls of Irvine, California, has created Helios, which can be carried on drones. To do much damage, an offensive laser needs to remain focused on its target for several seconds. Helios stops a laser from doing this by disrupting the systems controlling the beam – the Achilles’ heel for all such weapons. “Beam control is a critical function of high-energy lasers,” says Adsys CEO Brian Goldberg.

Helios can detect an incoming laser beam and identify its key characteristics, such as power, wavelength, pulse frequency and its source. Helios then interferes with the beam control – possibly by firing back a low-power laser of its own – so the attacking laser cannot fix on the target. “It provides permanent protection,” says Goldberg. “It’s not just buying time.”

He will not say exactly how the interference is done, but it may involve fooling the control system into thinking it is hitting its target despite the laser actually pointing a few metres to the side. A direct hit would have produced a big burst of reflected light, so a pulse sent back by an anti-laser laser could make it look like the original laser was on target.

Continue reading “Drones armed with anti-laser lasers that trick controls of enemy lasers into missing the drone” »

#Technology #WaveHarvester

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(Phys.org)—Are time crystals just a mathematical curiosity, or could they actually physically exist? Physicists have been debating this question since 2012, when Nobel laureate Frank Wilczek first proposed the idea of time crystals. He argued that these hypothetical objects can exhibit periodic motion, such as moving in a circular orbit, in their state of lowest energy, or their “ground state.” Theoretically, objects in their ground states don’t have enough energy to move at all.

In the years since, other physicists have proposed various arguments for why the physical existence of time crystals is impossible—and most physicists do seem to think that time crystals are physically impossible because of their odd properties. Even though time crystals couldn’t be used to generate useful energy (since disturbing them makes them stop moving), and don’t violate the second law of thermodynamics, they do violate a fundamental symmetry of the laws of physics.

However, now in a new paper published in Physical Review Letters, physicists from the University of California, Santa Barbara (UCSB) and Microsoft Station Q (a Microsoft research lab located on the UCSB campus) have demonstrated that it may be possible for time crystals to physically exist.

We are at the cusp of an energy revolution.

This post is a look at how three technologies — solar, batteries, and electric vehicles (EVs) — are poised to disrupt a $6 trillion energy industry over the next two decades.

I had the chance to sit down with Ramez Naam, chair of Energy and Environmental Systems at Singularity University and acclaimed author of the Nexus series, to discuss these major forces and their implications.

Continue reading “3 Big Trends Shaking Up the Energy Industry” »

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Nothing illustrates China’s meteoric rise as some well chosen numbers.

By the end of the 1990s, China had come to dominate the mainstays of geopolitical power in the 20th century – coal and steel production. As a consequence, it leapt to the top of the Compositive Index of National Capability, which uses military expenditure, military personnel, energy consumption, iron and steel production, urban population, and total population as a proxy of national power. Still, one could legitimately argue that all of these factors are hardly relevant today. While Germany’s fourfold preponderance in steel production over Russia may have been a critical number in 1914, China’s eightfold advantage in steel production over the US by 2014 is all but meaningless in any relevant comparison of national power. The world has moved on.

Continue reading “China Overtakes US in Scientific Articles, Robots, Supercomputers” »

Combination of solar plus storage to be cheaper than grid based power in Australia within the next year, meaning most of the energy use from households will be “hidden” from the networks. Time to think differently about the grid, and help consumers “share” energy.

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This new computer system is 100 billion times more energy efficient than the most energy efficient conventional green supercomputer. Using only links and rotary joints, this “molecular mechanical computer” removes the need for parts that create friction and generate heat.

The trend for computing, and for technology in general, really consists of just one word: Smaller. Previously, technology that could fit on your desk was the rage. Then it became tech that fit in your bag. Then the palm of your hand. Now, scientists are playing with even smaller technology, down to the molecular size.

Scientists have developed a computer system that can, theoretically, be 100 billion times more energy efficient than the most energy efficient conventional green supercomputer. Using only links and rotary joints, this “molecular mechanical computer” removes the need for gears, clutches, switches, springs, and other parts that create friction and generate heat.

Continue reading “New Molecular Mechanical Computer Design is 100 Billion Times More Energy Efficient” »