Beta

×

Welcome to the Slashdot Beta site -- learn more here. Use the link in the footer or click here to return to the Classic version of Slashdot.

Thank you!

Before you choose to head back to the Classic look of the site, we'd appreciate it if you share your thoughts on the Beta; your feedback is what drives our ongoing development.

Beta is different and we value you taking the time to try it out. Please take a look at the changes we've made in Beta and  learn more about it. Thanks for reading, and for making the site better!

Comments

top

2 Factor Authentication in the Real World? Please share your story.

LeadSongDog Clunky? (1 comments)

That rather depends on the two factors chosen. Biometrics can be pretty slick, especially for devices with user-facing cameras. Plus, if you do it right, they can protect against coerced logins (elevated pulse/respiration can be a sign of stress). Of course, if you do it wrong it will seem big-brotherish, spooky and invasive. You have to be able to trust your users with an open implementation.

about a week ago
top

OpenMW version 0.31.0 has been released!

LeadSongDog Learn to write a lede, please (1 comments)

It would help if the writer did not assume that readers already know the five W's for the article. Only after digging in two levels to the linked article does one discover that the topic is the reimplementatino of a software engine for the execution of videogames, with one in particular first.

about two weeks ago
top

Soon hard drives will be thousand times faster

LeadSongDog What can you do.. (1 comments)

..that will produce 1.25 petabyte/s to write?

about three weeks ago
top

DARPA demos lightweight, 94GHz silicon system on a chip

LeadSongDog Just say it (1 comments)

3.2mm

about a month ago
top

Great White Sharks Making Comeback Off Atlantic Coast

LeadSongDog Re:Actually it's good news since... (107 comments)

Mod parent up! If the sharks can get the seals back under control, there's still an outside chance the cod will recover (everyone sing together: "It's the circle, the circle of life!"). Then if that happens, maybe we'll even see an end to this glut of lobster! Disgusting bottom feeders.... they remind me of lawyers.

about a month ago
top

Researchers Unveil Experimental 36-Core Chip

LeadSongDog Great, so they reinvented (143 comments)

..the Transputer. Great idea, but a giant market fail.

about a month ago
top

Harley-Davidson Unveils Their First Electric Motorcycle

LeadSongDog "Project Livewire" (345 comments)

What, "ElectraGlide" was taken?

about a month and a half ago
top

Draper Labs Develops Low Cost Probe To Orbit, Land On Europa For NASA

LeadSongDog "Coffee Can" (79 comments)

But The Atlantic said "a small satellite about as large as a half-gallon of milk". I may be confused here, but at that ambient pressure, wouldn't that launched half-gallon of milk turn into a very much larger volume of water vapour, plus half a cup of freeze-dried milk solids? Just what would that volume be? Conversely, if it was a half-gallon at insertion, we're talking a fractional-droplet of milk at launch. So which is it?

Ya gotta love it when Americans try to talk down to each other about stuff that's already simple.

about a month and a half ago
top

Google To Take On Apple's CarPlay

LeadSongDog Re:So in 5 years... (126 comments)

No, in 5 years you'll have to pay extra to have Google drive the car go to where you want, stop, and unlock the doors to let you out. Decline to pay extra and you'll be delivered to the drive-through shopping mall that bids highest for your eyeballs. Or perhaps direct to the soylent green^H^H^H^H^H^H^H^H^H^H^H^H^Hrecycling plant....

about a month and a half ago
top

DARPA wants inflatable bundles to make walls or blockades – without humans

LeadSongDog Not clear what they're working on (1 comments)

The original request is at https://www.fbo.gov/index?s=op...
but it leaves a lot of guesswork to the objectives. It might be just basic tech development, but it suggests something more specific: delays for intruders into high value spaces. I'm thinking of ideas along the linew of carbon nanotube airbag walls, slow-cure sticky foam inflation and filling, and perhaps 3D fractal tree form factors. Have to wonder though, couldn't the same approach (without the foam) make an interesting chute?

about 2 months ago
top

NASA's Test Bed For Mars Chute: Kauai

LeadSongDog Re:Why not collect energy on the way down and... (40 comments)

Considering that the most problematic aspect of landing on a planet is a surplus of (kinetic) energy, why not find a way to take a long glide through the atmosphere while converting some of that energy and storing it in a form that can power a propeller, rocket engine or other device to slow down the last phase of descent? The air friction from this energy collecting phase would also serve to slow down the descent, making the final phase all the easier.

As far as forms of energy which could be converted to for storage: there's the possibility of converting CO2 to carbon carbon monoxide and oxygen; there's charging batteries to power a helicopter propeller; and ...? I don't suggest that these are practical methods of storing and using surplus energy --- they're just starting points.

Hmmm, I wonder if some of the principles of scramjet design could be used in reverse for braking? If you're making compressed O2, you'll need a way to bottle it in a hurry without creating excessive hazards for the crew. Anyhow, I'm glad someone's finally recasting the term "Martian flying saucers".

about a month ago
top

Samsung To Conquer Printer Market in 2020

LeadSongDog Easy (1 comments)

Just sell ink and toner at a less-than exhorbitant price, and say so. State the real price per page. I'd buy that. None of the others do, because they all use overpriced ink to subsidize cut-rate disposable printers.

about 2 months ago
top

Printing 3-D Replicas of Human Beings with a Home Brew Printer (Video)

LeadSongDog Life size (41 comments)

That would explain the stationary backbenchers on cable...

about 2 months ago
top

Did the Ignition Key Just Die?

LeadSongDog Re:Help! Help! (865 comments)

Do you really not know the difference between a clutch and a clutch pedal?

about 3 months ago
top

Star Cluster Ejected From Galaxy At 2,000,000 MPH

LeadSongDog Re:Velocity (133 comments)

So that would be 48.5 megaSmoot/semester, based on the conventional 39 hour semester

about 2 months ago

Submissions

top

Ask Slashdot: Carbyne Suited For Space Elevator Cable?

LeadSongDog LeadSongDog writes  |  about 9 months ago

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
top

DC Light Now Available

LeadSongDog LeadSongDog writes  |  about 10 months ago

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
top

Ask Slashdot: When is Patent License Trading not Trolling?

LeadSongDog LeadSongDog writes  |  about 10 months 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
top

(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
top

City-sized ice shelf breaks free

LeadSongDog LeadSongDog writes  |  1 year,22 days

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
top

Knotted flaky graphene oxide fibers are not weakened

LeadSongDog LeadSongDog writes  |  1 year,24 days

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
top

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
top

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
top

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
top

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
top

Cheap tuned plasmonic nanoshells boost infrared conversion efficiency

LeadSongDog LeadSongDog writes  |  about a year 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

Journals

LeadSongDog has no journal entries.

Slashdot Login

Need an Account?

Forgot your password?
or Connect with...

Don't worry, we never post anything without your permission.

Submission Text Formatting Tips

We support a small subset of HTML, namely these tags:

  • b
  • i
  • p
  • br
  • a
  • ol
  • ul
  • li
  • dl
  • dt
  • dd
  • em
  • strong
  • tt
  • blockquote
  • div
  • quote
  • ecode

"ecode" can be used for code snippets, for example:

<ecode>    while(1) { do_something(); } </ecode>