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Comment Re:Oh noes.... (Score 1) 40

by Locke2005 (#66368102) Attached to: Emmy Awards Leave Broadcast TV For Prime Video
Same thing I do, check out Google News the next day to see who won. My beach house doesn't get any broadcast TV reception or cable, so I literally can only watch content delivered over the internet. The only content I actually pay for is Google Plus, so I can't watch the Emmys regardless, and I could care less. I'm sure the good jokes will all be on YouTube.

Submission + - First Nuclear Clocks Start Ticking in Vienna and Beijing (phys.org)

Submitted by necro81
necro81 writes: Two groups, one in Vienna and one in Beijing, have successfully demonstrated the world's first nuclear clocks. Standard atomic clocks, like the caesium clocks that define the second, operate by observing the transition of electrons between different orbits about the nucleus. The resulting radiation is usually in the microwave range, and can produce clocks accurate to one second in 100 billion years.

Nuclear clocks go a step further, and probe energy transitions within the nucleus itself. Nuclei can arrange their protons and neutrons into different configurations, called isomers. The isomer with the lowest energy is the one usually found; higher-energy ones are only metastable and decay quickly. Usually it takes serious energy — x-rays and gamma rays — to excite a nucleus into a higher-energy arrangement. It so happens that thorium-229 can be excited using UV light with a wavelength of 148 nm — just within the capabilities of some exotic lasers.

It's still been quite a challenge. For one thing, Th-229 is not found in nature; it must be extracted from the decay chain of uranium-235. The Beijing team used just a microgram mixed in a crystal of calcium fluoride.

Although these prototype nuclear clocks are not yet more accurate than existing atomic clocks (one second in millions, rather than billions, of years), they show the way towards what may be possible. Because the energy transition is in the nucleus, rather than the electron cloud, it is less susceptible to outside disturbances like magnetic fields. And the fundamental frequency is much higher (five orders of magnitude), which should yield more precise timing. This development could lead to smaller and more reliable time standards across the world (and solar system).

Submission + - UK vegetables 20-50% less nutritious than in the 1960s (telegraph.co.uk)

Submitted by Bruce66423
Bruce66423 writes: 'The nutritional value of fruit and vegetables has fallen by up to 50pc since the Sixties because of declining soil quality, according to a new study.

'The study found that many crops had lost 20pc to 50pc of several key nutrients.

'Will Summers, a senior associate at the firm, said: “For 60 years we’ve measured food security in calories and tonnes per hectare.

'“On those measures we’ve done remarkably well. But we’ve been quietly hollowing out what’s inside our food.”

'The decrease in nutrient and vitamin value is thought to be down to declining soil quality and crops being selectively bred for their ability to grow quickly, rather than there being any focus on their health benefits.'

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