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Comments

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NASA's HI-SEAS Project Suggests a Women-only Mars Mission

LeadSongDog "Mars Needs Women!" (1 comments)

or should I say, "Venusians"?

yesterday
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'Endrun' Networks: Help In Danger Zones

LeadSongDog Re:So, mesh? (27 comments)

"I sense a great disturbance in the Force..."

yesterday
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If You're Connected, Apple Collects Your Data

LeadSongDog Re:Comparing Preview/Test to Release... (305 comments)

is it a hypocrite to take private nudes of yourself but not want to be naked in front of america on the movie screen? it sounds like both are defensible.

I don't know if it really matters any more: attention spans have fallen under the ten-second threshold. Why worry who sees what they're about to forget anyway?

yesterday
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Scientists Create World's Thinnest Electric Generator

LeadSongDog Clickbait (1 comments)

Once again, this Gizmag clickbait spammer conveniently forgets to link the real source, the press release at http://engineering.columbia.ed... Not that it's a great piece. "Generator" to describe yet another piezoelectric film? Pulleeze!

4 days ago
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Battery Breakthrough: Researchers Claim 70% Charge In 2 Minutes, 20-Year Life

LeadSongDog Re:Just moves a choke point (395 comments)

Generally fast chargers will not be in constant use.

Bull. When I pull off the motorway/freeway/throughway I'm usually stopping just long enough to buy a fresh coffee and dispose of the last one. If it wasn't for the latter requirement, I'd just use the drive-through. Strangely, there's always a line of other people doing the same things, even late at night. If recharging were a broadly-practiced parallel activity, many of them would be recharging, vice refilling as a serial activity. Most available fast chargers would be in use. After all, who would pay to buy and install extra ones that were not going to be used?
So, I want a wireless recharge in five minutes that will take me another three hours down the road, and I want it to be ubiquitously available. I'd settle for a simple and reliable cable connection, but it's not the first choice unless the efficiency hit for the wireless charger exceeds $1/charge. Nobody wants to be messing with manually mated cables when it's -30C or +35C outside. A robotic or drive-on-drive-off contact connections (as for electric subway cars) are viable alternatives. Payment systems have to be as automatic as a toll transponder.

5 days ago
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Battery Breakthrough: Researchers Claim 70% Charge In 2 Minutes, 20-Year Life

LeadSongDog Re:No mention on capacity though (395 comments)

Flywheels are fine for vehicles that only travel in straight lines, but when they have to turn corners, precession rears its ugly head, creating a torque that tries to barrel-roll the vehicle. That makes them useful for regenerative braking (which spins the flywheel fastest only when travelling slowest), but not for the main energy store (which spins fastest at the first part of a journey, irrespective of the speed of travel).

5 days ago
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Lockheed Claims Breakthrough On Fusion Energy Project

LeadSongDog Re:Much better article (564 comments)

Strangely, the Aviation Week article gives a very different size: they "fit into transportable units measuring 23 X 43 ft." Perhaps Reuters has a different source on the same LMCo release, or perhaps one of them just got it wrong.

5 days ago
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The $1,200 DIY Gunsmithing Machine

LeadSongDog Re:Why? (651 comments)

... police are NOT OBLIGATED TO PROTECT YOU

Sounds like you've identified a problem worth addressing. What do you propose to do to fix that?

about three weeks ago
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Reserve Bank ordered to pay back R250m to Mark Shuttleworth

LeadSongDog Exchange rate? (1 comments)

awarded R250m

According to http://www.google.com/finance?... the Rand is currently at USD 0.0888 At that rate, 250 milliRand would be USD 0.0222 which I'm sure Mark will be very eager to collect.

about three weeks ago
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The $1,200 DIY Gunsmithing Machine

LeadSongDog Wankers (1 comments)

Since when does "keep and bear" include "make"? This clown is going to ensure that developing these machines is labled as "aiding and abetting terrorism". Not that any self-respecting terrorist would carry anything like an AR-15, but...

about three weeks ago
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Scientists Seen As Competent But Not Trusted By Americans

LeadSongDog Re:Americans are smart. (460 comments)

But keep in mind that all of those "chemicals" in your food and medicines were passed upon by the FDA...

Citation needed. Appears to presume that FDA has awareness of what every farmer in China puts on his crops.

about three weeks ago
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Does Marketing stand in the way Fuel Efficient Car Features?

LeadSongDog Because curbweight (3 comments)

Compare http://www.auto123.com/en/hond... to http://www.auto123.com/en/hond... and you'll see your new vehicle is almost 200 kg more massive (about 20%). Every time you accelerate that mass, you get nailed with a bill from Dr. Newton. In order to maintain the same acceleration as before, they had to increase torque 20% and displacement 12%. They claim the same fuel economy as 1999, but you're probably right that it has gotten worse, even with the slight reduction in fuel capacity.
If you want real economy, you need to shed some of that new mass. That means less soundproofing, fewer airbags, smaller battery and alternator, etc. Good luck getting that to market. Carmakers have been "upsizing" model-loyal customers since there's been repeat customers. Bigger means more features means more revenue. Of course, you could always get a Vespa...

about a month ago
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SkyOrbiter UAVs Could Fly For Years and Provide Global Internet Access

LeadSongDog Re:satellites? (48 comments)

LEO sats go past quickly, so you need bigger power budgets in lieu of beam steering. You also give up bandwidth to manage doppler. Best to use a mix: LEO channels for small packets with low latency, GEO channels for bandwidth. Smart routing and channel bonding does the rest.

about a month ago
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Schizophrenia Is Not a Single Disease

LeadSongDog Re:DNA? (222 comments)

What if instead of sterilization we pass laws saying that if you knowingly and willingly pass defective genes on to your kid, you'll get prosecuted just as though you'd harmed them through abuse. For example, if a couple knew they were both carriers of the cystic fibrosis gene, they had a kid anyway, the kid had CF, and died at age 20, they would go to jail for murder.

captcha = "condom"

That would certainly discourage people from getting tested...

about a month ago
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Universal Big Bang Lithium Deficit Confirmed

LeadSongDog Re:Quite accurately? (171 comments)

...or there is something about the post big-bang that we do not quite understand.

Should we ask Kaley to explain it to you???

about a month ago
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Google Hangouts Gets Google Voice Integration And Free VoIP Calls

LeadSongDog Re:magicJack alternative? (162 comments)

Unless "don't be evil" will still allow them to profit off delivering ads customized to whatever you've been chatting about on VoIP, then the profit has to be found in licensing Android. How's that working out so far?

about a month ago
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Ask Slashdot: Linux-Friendly Desktop x86 Motherboard Manufacturers?

LeadSongDog Re:Self-extracting EXEs (294 comments)

(Why do I hear these words with James Doohan's voice?)

"Och, lad, yae didnae tell him when yae coud raelly have it done?!?!?"

about a month and a half ago
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No, a Stolen iPod Didn't Brick Ben Eberle's Prosthetic Hand

LeadSongDog Re:Slashdot got a sensational story wrong? (122 comments)

More likely because they both end with ".com". This is, of course, a perfectly understandable error. No commercial website would ever do anything in order to benefit the reader, after all.

about 2 months ago

Submissions

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Ask Slashdot: Carbyne Suited For Space Elevator Cable?

LeadSongDog LeadSongDog writes  |  1 year,3 days

LeadSongDog (1120683) writes "Somebody check my numbers, this sounds too good to be true... A new ACS paper on the theoretical structure of carbyne gives its breaking strength at 10nN for a single atomic chain of carbon. A single C12 atom weighs (at 1g) 2e-25 N, so the chain could support 5e24 atoms at that acceleration. If the atoms repeat 17 times for every 2.2 nm along the chain, the self-supporting chain could be 6e14 m long. This seems to be way longer than the space elevator would need, so I'm inclined to think I've missed something basic. What am I overlooking?"
Link to Original Source
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DC Light Now Available

LeadSongDog LeadSongDog writes  |  1 year,5 days

LeadSongDog (1120683) writes "The headline writers at PhysOrg report "New material gives visible light an infinite wavelength". Of course the details within are rather less spectacular: "Researchers from the FOM Institute AMOLF and the University of Pennsylvania have fabricated a material which gives visible light a nearly infinite wavelength". The original work uses language that makes clear they are speaking of the phase velocity of visible light, under the title "Experimental realization of an epsilon-near-zero metamaterial at visible wavelengths". Still, it's an interesting read. http://www.nature.com/nphoton/journal/vaop/ncurrent/full/nphoton.2013.256.html"
Link to Original Source
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Ask Slashdot: When is Patent License Trading not Trolling?

LeadSongDog LeadSongDog writes  |  about a year ago

LeadSongDog (1120683) writes "A piece in yesterday's Forbes offers arguments on why not all "Non-Practicing Entities" are "Patent Trolls". Comments here on such businesses are often critical. Is there a right way to trade in patents for profit without abusing the process?"
Link to Original Source
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(Can't help it): Uranus is holding a Trojan

LeadSongDog LeadSongDog writes  |  about a year ago

LeadSongDog (1120683) writes "Space.com is reporting on a 60km comet-like body in Lagrangian orbit around the Sun, locked to Uranus. This means a distant, but fairly accessible supply of water-ice, hence reaction mass, hydrogen and oxygen for robotic miners if we can just get them there with an energy source."
Link to Original Source
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City-sized ice shelf breaks free

LeadSongDog LeadSongDog writes  |  about a year ago

LeadSongDog (1120683) writes "Germany's TerraSAR-X satellite is showing that the Antarctic's Pine Island ice shelf has calved a 'berg of 720 square kilometres, "the size of Hamburg".

Angelika Humbert says "The Western Antarctic land ice is on land which is deeper than sea level. Its "bed" tends towards the land. The danger therefore exists that these large ice masses will become unstable and will start to slide". The article extrapolates that "If the entire West Antarctic ice shield were to flow into the Ocean, this would lead to a global rise in sea level of around 3.3 metres."

Goodbye Florida.
 "

Link to Original Source
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Knotted flaky graphene oxide fibers are not weakened

LeadSongDog LeadSongDog writes  |  about a year ago

LeadSongDog (1120683) writes "James Tour, in Advanced Materials, advises that his team has learned how to knot and weave graphene oxide fiber without losing strength. By mixing in large flakes, it keeps its bend radius relatively large at the knots. The resultant product reaches a 47GPa tensile modulus, just as strong as the native fiber. So, can this lesson be applied to carbon nanotubes, to fulfill Arthur C. Clarke's vision of a space elevator?

The full paper is at http://onlinelibrary.wiley.com/doi/10.1002/adma.201301065/abstract"

Link to Original Source
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It's the kablooie that keeps on giving

LeadSongDog LeadSongDog writes  |  about a year ago

LeadSongDog (1120683) writes "A new paper, complete with pretty pictures, on the arXiv at http://arxiv.org/pdf/1305.7399v1.pdf details some remarkable lessons from a local (inside our galaxy) supernova circa 1900. The formal publication is due to be out in Astrophysical Journal Letters on July 1, and a popsci blurb is available at http://phys.org/news/2013-06-remarkable-supernova.html for the busy readers of /.

Studying the radio and x-ray emissions (synchrotron radiation from energetic electrons at the shockwave front) allowed researchers to find variations in metal distribution around the sphere. They estimate the event produced 10^20kg of electron/positron pairs, nearly all of which have since recombined.

I for one am rather glad I wasn't nearby that day."

Link to Original Source
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Time to disable texting from the driver's seat?

LeadSongDog LeadSongDog writes  |  about a year ago

LeadSongDog (1120683) writes "The good folks at the American Automobile Association's Foundation for Traffic Safety have been funding the University of Utah to examine the distraction of hands-free controls. Fitted up with brain-monitor skullcaps, subjects were shown to be most distracted when they had to focus on voice commands, especially when drafting texts and emails. Once again, we find that multitasking is illusory, something always suffers."
Link to Original Source
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Ask Slashdot: How will MS monetize this?

LeadSongDog LeadSongDog writes  |  about a year ago

LeadSongDog (1120683) writes "The Beeb blurbs that MS will now be "giving" away Outlook, but it comes at a price: you have to run the (freebeer) Win8.1 update to get it. Other platforms still need to cough up the big bucks/pounds/Euros/yaddayadda. So how are they turning this into a revenue stream?"
Link to Original Source
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Binary.. older than you thought!

LeadSongDog LeadSongDog writes  |  about a year ago

LeadSongDog (1120683) writes "From our wait-a-minute...that's-no-moon! department, the mother corps advises that today's giant asteroid 1998 QE2 is actually the primary of a binary system. Hiding close to the biggie is a smaller (but still dangerous) 600 m diameter secondary. Seems 16% of large asteroids are binaries..."
Link to Original Source
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Cheap tuned plasmonic nanoshells boost infrared conversion efficiency

LeadSongDog LeadSongDog writes  |  about a year and a half ago

LeadSongDog (1120683) writes "Using inexpensive quantum nanodots in a colloidal suspension, researchers have boosted the IR conversion efficiency of PbS solar cells by a whopping 35%. While this still needs much work, anything that brings down cost while raising output has to be welcome. Further info at http://www.overclockersclub.com/news/33826/."
Link to Original Source

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