Please create an account to participate in the Slashdot moderation system

 



Forgot your password?
typodupeerror

Comment: Re:Paint one side. (Score 1) 71

by gstoddart (#49819283) Attached to: Fuel Free Spacecrafts Using Graphene

Oh, don't get me wrong .. I get there are some actual badass Civics out there. I've seen all the Fast and the Furious films. ;-)

But I've also seen the piece of crap cars with all of the stickers and none of the mods with the cheap-ass plastic spoiler held on with duct tape and rolling on bald tires.

I don't know which of these two painting one side of the graphene this sail gets us.

Comment: Twofer (Score 3, Informative) 71

by Dan East (#49818929) Attached to: Fuel Free Spacecrafts Using Graphene

A quick search on converting photons to electrons turned this up:

http://cleantechnica.com/2013/...

A new discovery by researchers at the ICFO has revealed that graphene is even more efficient at converting light into electricity than previously known. Graphene is capable of converting a single photon of light into multiple electrons able to drive electric current.

So that could be where the extra electrons are coming from.

Comment: Re:Paint one side. (Score 1) 71

by gstoddart (#49818913) Attached to: Fuel Free Spacecrafts Using Graphene

A solar sail with one side painted and the other painted with graphene might be really cool.

Hmmm ... you mean "really cool" in the "it will do more useful stuff" sense of the word? Or in the sense of adding a spoiler and neon running lights to a beat up Honda Civic "might be really cool"?

Or maybe the painted side could have a jolly roger on it to play space pirate?

Honestly, is painting one side functional?

Space

Fuel Free Spacecrafts Using Graphene 71

Posted by samzenpus
from the to-the-stars-and-beyond dept.
William Robinson writes: While using a laser to cut a sponge made of crumpled sheets of Graphene oxide, Researchers accidentally discovered that it can turn light into motion. As the laser cut into the material, it mysteriously propelled forward. Baffled, researchers investigated further. The Graphene material was put in a vacuum and again shot with a laser. Incredibly, the laser still pushed the sponge forward, and by as much as 40 centimeters. Researchers even got the Graphene to move by focusing ordinary sunlight on it with a lens.Though scientists are not sure why this happens, they are excited with new possibilities such as light propelled spacecraft that does not need fuel.

Comment: Re: 1 thing (Score 1) 402

Not necessarily. If you factor in your bonuses from your current job.
How much the company chips in your 401k, how much for Health Care.... It adds up to your actual salary, not just your paid salary.
So if you were making 50k you can safely say with bonuses etc you were getting 75k.

Comment: Re:Awesome (Score 1) 71

by MightyMartian (#49817161) Attached to: The Artificial Pancreas For Diabetics Is Nearly Here

Except that it isn't an instant. Insulin takes effect pretty darned quickly. Thyroid changes can take days or weeks, and the synthetic hormones themselves actually have to be taken under specific circumstances, as absorption into the blood stream orally requires no significant intake of food. My wife takes her medication early in the morning and then cannot eat for something like three hours.

Having an artificial thyroid that would more closely monitor TSH (thyroid-stimulating hormone, the way your body monitors and adjusts thyroid hormone levels is complex) and adjust actual thyroid hormone levels directly would be far better in the long run.

Comment: know when to move on. (Score 2) 402

When you get to a position where the person in front of you has to quit (or die) for you to get ahead, move on...

However, never run *away* from a situation, only run to something better (with more opportunity), often the grass appears greener elsewhere, but you should do your homework.

Oh yeah, and accumulate as many brownie points as you can along the way, they will come in handy...

Comment: Re:Permission vs Forgiveness (Score 1) 402

It's better to ask forgiveness than to get permission.

It is always *easier* to ask forgiveness than to get permission, but if the result is poor, depending on your place in the line, it is not always *better*...

Luke 12:48 But the one who does not know and does things deserving punishment will be beaten with few blows. From everyone who has been given much, much will be demanded; and from the one who has been entrusted with much, much more will be asked.

What sin has not been committed in the name of efficiency?

Working...