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Comment: Just need repeatable results, not a theory (Score 2) 815

by hcg50a (#34984070) Attached to: Italian Scientists Demonstrate Cold Fusion?

I call BS.

For every nickel atom converted to copper, you need about 4 additional neutrons to make stable copper (they state there is no left over radioactivity). Where are those coming from? Those are probably harder to get than shoving the single proton into the nucleus, which is hard enough!

Not plausible. But repeatable results by independent investigators is always plausible. And they don't have that either.

Comment: Re:Can anybody summarize TFA? (Score 5, Informative) 184

by hcg50a (#33987158) Attached to: Physicists Say Graphene Could Create Mass

The /. title of this article is wrong, stupid and misleading.

The title of TFA is "Dynamical mass generation via space compactification in graphene", which is mostly incomprehensible.

The abstract sez "Fermions in a graphene sheet behave like massless particles. We show that by folding the sheet into a tube they acquire non-zero effective mass as they move along the tube axis. That is, changing the space topology of graphene from 2D to 1D (space compactification) changes the 2D massless problem into an effective massive 1D problem."

A plain english annotated translation is "Electrons in a graphene sheet behave like massless particles. We show that by folding the sheet into a tube they behave like massive particles as they move along the tube axis. That is, changing the shape of graphene from 2D to 1D changes the 2D massless problem into an effective 1D massive problem, which may be easier to solve or model or understand in certain respects.

Note electrons have the same real mass in both cases. Mass is not being created or destroyed.

Comment: Conservation of energy/momentum (Score 1) 221

by hcg50a (#30106554) Attached to: The Space Garbage Scow, ala Cringely

...means the net will lose speed every time it captures some junk. The author needs to take high school physics again.

Tacking on a sailboat works because the wind is blowing on the sail, adding energy to the whole craft.

Scooping stuff in a net is just an inelastic collision. The momentum gain of the junk will equal the momentum loss of the net. The net's orbit will decay as it captures more and more junk.

Comment: Re:L2? (Score 3, Informative) 121

by hcg50a (#27954171) Attached to: Successful Launch of ESA's Herschel and Planck

Actually, it's the Earth and the Sun. It's on the Earth-Sun line, behind the earth (from the sun's point of view), and orbits the sun once a year. They put it here because it's easier to shield the satellite from both the Sun and Earth.

The L2 point for the Earth-Moon system is on the Earth-Moon line, behind the moon, and orbits the earth once evry 29.5 days.

Operating Systems

A Taste of FreeBSD With VirtualBSD 43

Posted by timothy
from the touches-of-os-x dept.
ReeceTarbert writes "If you wanted to try FreeBSD but didn't have the right hardware, or enough time to make it useful on the desktop, VirtualBSD might fit the bill: it's a VMware appliance based on FreeBSD 7.1-RELEASE and features the Xfce 4 Desktop Environment and a few of the most common applications to make it very functional right out of the box. If you're curious you can have a look at the screenshots, or proceed to the download page and grab the torrent file right away. (Note: VirtualBSD also works in VirtualBox 2.x as long as you create a new virtual machine and select the virtual disk from the archive instead of creating a new one)."
Networking

+ - NASA successfully tests DTN

Submitted by hcg50a
hcg50a (690062) writes "NASA has successfully tested the first deep space communications network modeled on the Internet. Working as part of a NASA-wide team, engineers from NASA's Jet Propulsion Laboratory in Pasadena, Calif., used software called Disruption-Tolerant Networking, or DTN, to transmit dozens of space images to and from a NASA science spacecraft located about 20 million miles from Earth. Here's an article from July, before the test began."
Windows

Windows Genuine Advantage Gets More Lenient 228

Posted by kdawson
from the you-may-already-be-a-pirate dept.
Troglodyte writes in with word that Microsoft is revamping its Windows Genuine Advantage program so that it labels fewer users pirates. WGA now has a third category besides "genuine and "not genuine," called "not sure." Quoting: "[I]t's quite obvious what is going on here: Microsoft has added 'not sure' as a way of cutting down on the number of false positives associated with WGA. As many as one in five PCs were failing WGA checks, but this new setting should both reduce this and give Microsoft the chance to investigate further the kinds of things that are landing folks in the 'not sure' category."
Bug

IE and Firefox Share a Vulnerability 207

Posted by kdawson
from the upload-with-daring-and-whimsy dept.
hcmtnbiker writes with news of a logic flaw shared by IE 7 and Firefox 2.0. IE 5.01, IE 6, and Firefox 1.5.0.9 are also affected. The flaw was discovered by Michal Zalewski, and is easily demonstrated on IE7 and Firefox. The vulnerability is not platform-specific, but these demonstrations are — they work only on Windows systems. (Microsoft says that IE7 on Vista is not vulnerable.) From the vulnerability description: "In all modern browsers, form fields (used to upload user-specified files to a remote server) enjoy some added protection meant to prevent scripts from arbitrarily choosing local files to be sent, and automatically submitting the form without user knowledge. For example, '.value' parameter cannot be set or changed, and any changes to .type reset the contents of the field... [in this attack] the keyboard input in unrelated locations can be selectively geared toward input fields by the attacker."

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