Follow Slashdot stories on Twitter

 



Forgot your password?
typodupeerror
Polls on the front page of Slashdot? Is the world coming to an end?! Nope; read more about it. ×

Comment: Re:Obviously (Score 1) 246

by johanwanderer (#49824809) Attached to: Fuel Free Spacecrafts Using Graphene
From the New Scientist article, they talked about the possibility that the incoming photons boil off electrons from the sponge, and most of those electrons were emitted in the opposite direction of the light beam, generating more thrusts than can be accounted by just the light pressure alone.

They also raised the issue that, if that were actually the case, you would end up with a dangerous level of positive charge. Without being able to neutralize the charge, this would not make for a good propulsion system.

Comment: Re:If the headline is posed as a question, the ans (Score 1) 384

by johanwanderer (#49737299) Attached to: Ask Slashdot: Best Way To Solve a Unique Networking Issue?
Besides, if you can do it in 1/16th of the time, you might find your maintenance budget get slashed to 1/16th of previous year/quarter.

From what you described, it seems you/they allocate about a day to upgrade each station (16 units at 0.5 hour each.) Beats driving around in traffic to 16 different stations a day, too.

Comment: Re:Can we use this? (Score 1) 157

by johanwanderer (#49547409) Attached to: Wormholes Untangle a Black Hole Paradox
Imagine you have two marbles, one red, one black. Put both of them in a bag, shake it up, and pick one out to put in your pocket. Don't look at it.

Now send the bag with the other marble inside somewhere. Across the country, to the ISS, to Mars, next star system, where ever.

Now pull out the marble in your pocket. If it's red, the other one must be black, and vise versa. However far they are apart.

Replace marbles with particles, and colors with spins.

You have been able to determine the other particle's properties instantly over vast distance, yet you have not transfer any information.

Comment: Not with a bad set of requirements (Score 1) 209

by johanwanderer (#49470197) Attached to: Linux Getting Extensive x86 Assembly Code Refresh

Wouldn't a total re-write be the right thing to do instead?

Yes, if you can get the proper requirements. (This does not apply to the current article, since I assume that the requirements for these syscalls, etc. are well described.)

On most business systems, especially one that us written over the course of a few months, the requirements are just as spaghetti as the code, so rewriting the system from scratch might also rewriting the requirements from scratch, which is a monumental task if it already have customers with different configurations.

On a more humorous note, I find it funny that this is today's article on The Daily WTF: Seven Minutes In Heaven

Comment: Bad idea (Score 1) 253

Think of the fire hazard when insulation dust fills that server. Save yourself the headache and just get a NUC or something similar and put it on the bookshelves. If fire doesn't scare you, think of all the water pipes down there. I came home one day to find that my pressure regulation valve has broken and sprayed the whole crawl space with water. It was such a mess, and I was glad nothing valuable was down there.

Comment: Re:Malware (Score 1) 181

by johanwanderer (#48756587) Attached to: Inside Cryptowall 2.0 Ransomware

don't allow your users to be admins on their local machines,

Ding ding ding ding ding... whenever anyone came to me for malware-related help with Windows, I make sure that they no longer have admin privileges before I let them back in. Create a separated local admin account for them if necessary, but their everyday web-surfing and mail-reading account should not need admin privileges.

Comment: Possibly new approach (Score 1) 197

by johanwanderer (#48638027) Attached to: Quantum Physics Just Got Less Complicated
On the other hand, New Scientist reported on a new approach with leaky (non-infinite) multiverse that can explain away both of these uncertainties. It's at least an interesting read.

Ghost universes kill Schrödinger's quantum cat

To quote:
"THE wave function has collapsed – permanently. A new approach to quantum mechanics eliminates some of its most famous oddities, including the concept of quantum objects being both a wave and a particle, and existing in multiple states at once."

"To take a significant step forward, you must make a series of finite improvements." -- Donald J. Atwood, General Motors

Working...