×

Announcing: Slashdot Deals - Explore geek apps, games, gadgets and more. (what is this?)

Thank you!

We are sorry to see you leave - Beta is different and we value the time you took to try it out. Before you decide to go, please take a look at some value-adds for Beta and learn more about it. Thank you for reading Slashdot, and for making the site better!

Comments

top

Arms Regulations Damaging US Space Industry

doctor_nation Old News (184 comments)

Yeah, and this has been the case since, oh, 2001? Well, at least it seems that's when it started to be enforced more strictly. I've heard rumblings that the administration was going to change it, but who knows how likely that is.

Hmmm... I wonder if we could correlate the US's drop in space proficiency with when ITAR for space components started?

more than 4 years ago
top

Chatroulette Working On Genital Recognition Algorithm

doctor_nation Really... (364 comments)

I don't understand why they don't have a simple voting system. If a user does something bad or obscene, vote them down. Then match the poorly rated people with each other. Or just have an obscenity button and if a person triggers it multiple times they get kicked off.

more than 4 years ago
top

Google forces image background, cripples RDP users

doctor_nation Already fixed (2 comments)

This complaint is already old- Google defaults back to white now, with the option of adding an image if you want.

I did notice the slow-loading image though (although I usually use iGoogle now...).

more than 4 years ago
top

Neuros LINK Mixes Quiet, Aesthetics, and Ubuntu

doctor_nation Re:ATI? eek! (121 comments)

No kidding. I'm running the same thing and it's been nothing but trouble. I did at least manage to get the proprietary drivers to work after upgrading the BIOS. That gets me DVD playback at high quality. But I haven't figured out the HDMI connection yet, and flash is horrible.

more than 5 years ago
top

BIOS "Rootkit" Preloaded In 60% of New Laptops

doctor_nation 60%? Really? (236 comments)

60% seems awfully high for a program I've never heard of. Not that I've been laptop shopping lately, but still.

more than 5 years ago
top

The Myth of the Mathematics Gender Gap

doctor_nation Re:why all the fuss? (3 comments)

Because if you are hiring a math professor and there is scientific proof that women are worse than men at it, then you have reason to discriminate against all women applicants. That is probably a big reason why there's such a gender gap right now, even if its gotten better. The sooner that bullcrap about women being worse than men in any particular job is put to rest, the better for equality.

more than 5 years ago
top

Achievements and Optimizations

doctor_nation Re:But does it improve story quality? (294 comments)

I suspect we are in need of at least two "Whoooosh!"'s here.

Humor is so hard to detect in text...

more than 5 years ago
top

Using Lasers and Water Guns To Clean Space Debris

doctor_nation Re:Water???? (267 comments)

Yeah, I think water is a more dangerous proposition due to the possibility of ice chunks forming. I think just using N2 might work better than water because of that.

I meant just deorbiting via ablation as well- if you try to target and ablate every piece enough to deorbit it...well it will take a very long time and a lot of energy. I like the increased drag approach because it will affect everything, from paint chips to discarded boosters.

more than 5 years ago
top

Using Lasers and Water Guns To Clean Space Debris

doctor_nation Re:Do the math, fellas (267 comments)

Your own maths are incorrect. At an altitude of 1000 km, in a torus 100 km in diameter, there is a total of about 1200 kg of gas. So to double the mass in that torus, all you'd need is a metric ton or so of water or some other material. Not 10^15 kg.

Orbit time decreases exponentially as altitude decreases, so just moving objects from 1000 km to 800 km would reduce the time in orbit by years if not decades.

more than 5 years ago
top

Using Lasers and Water Guns To Clean Space Debris

doctor_nation Re:How do you pull with a push? (267 comments)

Yeah, if you hit the bottom, you could cause a more elliptical orbit that would dip deeper into the atmosphere, resulting in larger drag. The question would be how efficient it is...

more than 5 years ago
top

Using Lasers and Water Guns To Clean Space Debris

doctor_nation Re:Water???? (267 comments)

Well, no, you'd waste a lot more time and energy firing lasers to ablate tiny pieces of debris. Sending up a rocket with a couple tons of water would be relatively cheap. And the water would turn to vapor (if done right), so it would essentially just create a band of increased density that would increase the drag on all pieces of the debris at once, without causing additional debris. Over time, the water would deorbit as well due to gravity and return to Earth.

more than 5 years ago
top

Using Lasers and Water Guns To Clean Space Debris

doctor_nation Re:Water is heavy (267 comments)

It depends on the method used to disperse it. If done right, it should be a fine enough mist to not form ice chunks, or they would be small enough to sublimate quickly.

Another possibility is to use liquid nitrogen instead of water.

more than 5 years ago
top

Using Lasers and Water Guns To Clean Space Debris

doctor_nation Re:Water is heavy (267 comments)

Not as expensive as having all your spacecraft shredded by debris.

And nobody said it had to be pure, drinkable water. Besides, you could get it from someplace that has a lot of water (Great Lakes for example). You'd only need a couple tons probably, which isn't very much. A few swimming pools.

more than 5 years ago
top

Using Lasers and Water Guns To Clean Space Debris

doctor_nation Re:Well, armchair rocket science here... (267 comments)

Zapping: This isn't what you think. The idea is to ablate one side of the debris so it de-orbits, rather than making it into smaller pieces.

Collecting: Probably not easy.

Adding atmosphere: interesting point about de-orbiting bad things, but the de-orbiting is going to happen anyway if these things are in a low enough orbit to be a debris problem. Adding density to space will just accelerate the deorbit.

more than 5 years ago
top

Matt Hazard Returns

doctor_nation Re:Who? (31 comments)

Wow, it takes a special kind of laziness to not even read the summary! You must be a grad student or something. Or a really good programmer.

more than 6 years ago
top

State of Kentucky Seizes Control of 141 Domain Names

doctor_nation Wow. (505 comments)

I am just completely flabbergasted that this can occur. By this logic, China could sue every website that posts anti-government information and seize all of their domains. Including something like google. This is really blowing my mind- can someone smarter than me explain what the judge was smoking, and why this isn't actually going to happen?

more than 6 years ago
top

Barr Sues Over McCain's, Obama's Presence on Texas Ballot

doctor_nation Texas is republican... (918 comments)

This is going to be a non-issue. Or McCain's name will magically appear on the ballot but Obama's won't. Texas is strongly republican, so there's no way McCain won't be on the ticket. If Texas has this rule in place, I'm sure there's some other sub-rule or exception that allows for reserving the nominee's spot, or the 70-day rule only applies to non-Dem/GOP people. It doesn't make any sense to have such a rule when both parties nominate their candidates later in the year than that.

more than 6 years ago

Submissions

doctor_nation hasn't submitted any stories.

Journals

doctor_nation has no journal entries.

Slashdot Login

Need an Account?

Forgot your password?