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Comment Thank you BeauHD for more proof (Score 0, Flamebait) 85

I'm hoping everyone on Slashdot posting here understands what an algorithm actually is.

My guess is they don't, because BeauHD obviously doesn't in his rush to slam trumpet.

https://en.wikipedia.org/wiki/...

To put in layman terms - everything automated takes parameters and creates a result. It's because people make a sorta flowchart that draws on information and slam bam Kazam - outputs a result.

Which is now evil because of Trump.

Whipslash, please, I'm begging.

Tell him to stop shifting the site to SJW and EnviroNazi!

Submission + - House Passes Email Privacy Bill

Obfiscator writes: The US House of Representatives passed a bill to require federal agencies to obtain a warrant before being granted access to email communications. From the article: "This Act will fix a constitutional flaw in ECPA, which currently purports to allow the government to compel a provider to disclose email contents in some cases without a warrant, in violation of the Fourth Amendment. The Email Privacy Act ensures that the content of our emails are protected in the same way that the Fourth Amendment protects the items we store in our homes."

The full text of the bill is here, although somewhat hard to read since it's a modification of a previous bill. This appears to be the most relevant part: "a governmental entity may require the disclosure by a provider of electronic communication service of the contents of a wire or electronic communication that is in electronic storage with or otherwise stored, held, or maintained by that service only if the governmental entity obtains a warrant issued using the procedures described in the Federal Rules of Criminal Procedure."

Submission + - LIGO doesn't just detect gravitational waves. It makes them, too (sciencemag.org)

sciencehabit writes: The Laser Interferometer Gravitational-Wave Observatory (LIGO) is not only the most sensitive detector of ripples in spacetime. It also happens to be the world's best producer of gravitational waves, a team of physicists now calculates. Although these waves are far too feeble to detect directly, the researchers say, the radiation in principle could be used to try to detect weird quantum mechanical effects among large objects.

Submission + - Sad news from JAXA's de-orbiting cable system

rickyslashdot writes: The theory of using the earth's electro-magnetic field to provide deceleration to orbital debris failed when JAXA's satellite was unable to extend it's cable. Because of the short period of time available for this test, there wasn't sufficient time for JAXA's ground specialists to resolve the un-spooling failure, and the craft re-entered burn-up without providing any useful information on whether the de-orbiting process was feasible.

https://www.newscientist.com/a...

Although this process of orbital velocity alteration/deceleration appears sound, it lost it's current chance to prove this ability to alter altitude and orbital velocity because of a glitch that prevented the 'long wire' electromotive element from deploying.

Because of the simplicity of this system, it is bound to be tested again — hopefully sooner than later.

If proven successful in later tests, it will mean that de-orbiting 'junk' can be done by attaching a 'long-wire' tether to the junk, and just waiting for physics to take the junk from orbit to atmospheric burn-up.

This process is inherently safer than using rocket engines (to be attached to the junk), and is much less of a 'mass-to-orbit' cost, since it only requires a grappling system, and a spool of wire/cable. The cable does NOT have to be structurally strong, as it is only used to provide an electro-magnet dynamic drag on the attached 'junk'.
Additionally, it effectively de-orbits the complete chunk of 'debris' without the problems involved with kinetic nets that would tend to fragment, or shatter, portions of the junk while reducing it's orbital velocity enough to bring it down. Even the tiniest piece of left-over debris that could be released from the 'capture-net' system could still prove a real problem, since these tiny pieces are realistically impossible to track, and can cause real damage due to their relative velocitiy in respect to orbiting spacecraft.

Hopefully, there will be a follow-up / re-try in the near future for this orbital debris clean-up process.

Submission + - TeraHertz Transmitter Can Push 100Gbps+ Wireless Speeds via a Single Channel

Mark.JUK writes: A team of Japanese scientists working jointly for Hiroshima University and Panasonic have managed to develop a TeraHertz (THz) transmitter that is capable of transmitting digital data at a rate of 105Gbps (Gigabits per second) over a single channel using the frequency range from 290GHz to 315GHz. Previously it was only possible to achieve such speeds by harnessing multiple channels at the same time.

Prof. Minoru Fujishima, Hiroshima University, said: “This year, we developed a transmitter with 10 times higher transmission power than the previous version’s. This made the per-channel data rate above 100 Gbit/s at 300 GHz possible. We usually talk about wireless data rates in megabits per second or gigabits per second. But we are now approaching terabits per second using a plain simple single communication channel."

The team envisages a future where such technology could power Satellite and Mobile communications, although this is still a distant dream as many such technologies struggle to send their signals more than a few metres. Boosting the power can overcome some of the problems, but it also makes related hardware very difficult to convert into a portable form.

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