Search found 301 matches

by SWGlassPit
Sat Apr 27, 2013 1:46 am UTC
Forum: The Help Desk
Topic: LaTeX error - problem with style file?
Replies: 2
Views: 2850

Re: LaTeX error - problem with style file?

I don't have my computer with LaTeX up, but I think the issue is in the .tex file, specifically the \title{} line. The underscore is a math mode command, and you're not in math mode when you call it. If you're trying to use it to subscript something, you'll need to be in math mode. I'm willing to be...
by SWGlassPit
Sat Apr 06, 2013 11:33 pm UTC
Forum: Science
Topic: How space programs benefit us here on Earth
Replies: 36
Views: 6171

Re: How space programs benefit us here on Earth

WD-40 was originally developed to prevent corrosion on Atlas missiles AKA, the first American ICBM. That's a wider problem with assigning innovations to the "space program", let alone space exploration. Guided missiles were probably the most crucial military technology of the post-WW2 per...
by SWGlassPit
Sun Mar 24, 2013 1:44 am UTC
Forum: Science
Topic: How space programs benefit us here on Earth
Replies: 36
Views: 6171

Re: How space programs benefit us here on Earth

The alloys used in modern car turbo chargers was developed for the fuel pumps on the space shuttle. Other spinoffs: WD-40 was originally developed to prevent corrosion on Atlas missiles (the same booster used to launch the Mercury orbital missions) Astroglide came from work on the cooling system fo...
by SWGlassPit
Mon Oct 01, 2012 3:18 pm UTC
Forum: Coding
Topic: Why is my integral not entirely accurate?
Replies: 25
Views: 6736

Re: Why is my integral not entirely accurate?

Ok, I see that now. :-)
by SWGlassPit
Mon Oct 01, 2012 3:03 pm UTC
Forum: Coding
Topic: Why is my integral not entirely accurate?
Replies: 25
Views: 6736

Re: Why is my integral not entirely accurate?

I'm seeing lots of code specific comments in here about the error in the computations, but not really much of anything from a numerical analysis perspective. You are essentially doing a Riemann sum based on the left endpoint. It would be good to be able to quantify, a priori , the error you can expe...
by SWGlassPit
Mon Oct 01, 2012 2:10 pm UTC
Forum: Science
Topic: Why is the space program located at sea level?
Replies: 31
Views: 9438

Re: Why is the space program located at sea level?

As has been said several times already, you want to avoid launching over populated areas, just in case your rocket blows up. As it turns out, launching from a few hundred feet from the shore meets that need, and being next to the shore necessarily means being at sea level. People have mentioned equa...
by SWGlassPit
Mon May 21, 2012 7:17 pm UTC
Forum: Science
Topic: Most geeky thing you've done recently.
Replies: 133
Views: 50528

Re: Most geeky thing you've done recently.

I'm in a room full of people watching the SpaceX launch. I'm not actually watching it, I'm making a post here and then playing D3 and listening to cool music - because egads, space news coverage by general media is slightly less interesting than the pollen report - but recently, definitely yeah. An...
by SWGlassPit
Fri May 11, 2012 4:13 pm UTC
Forum: Science
Topic: Launch my own satellite
Replies: 13
Views: 3527

Re: Launch my own satellite

Slightly related, you can buy space on the International Space Station through Nanoracks at a cost of 25K USD (educational) or 50K USD (commercial) per CubeSat unit (a 10-cm cube). For CubeSats not sent to the ISS, check out http://www.cubesat.org
by SWGlassPit
Fri May 11, 2012 2:59 pm UTC
Forum: XKCD Meetups
Topic: Kansas City meetups?
Replies: 7
Views: 22207

Re: Kansas City meetups?

Lawrence here.
by SWGlassPit
Wed Dec 14, 2011 5:42 pm UTC
Forum: Science
Topic: Drawing figures for LaTeX
Replies: 9
Views: 4991

Re: Drawing figures for LaTeX

My program of choice is Xfig. It allows combinations of raster and vector graphics, and it allows LaTeX to render the text, so formulae can be used in figures.
by SWGlassPit
Wed Dec 14, 2011 5:11 pm UTC
Forum: News & Articles
Topic: SpaceShipOne, supersized
Replies: 60
Views: 8860

Re: SpaceShipOne, supersized

What's the advantage of carrying a rocket to altitude prior to launching it? I would have imagined the fuel cost for lugging something that high would be pretty significant; is it that you can use jet fuel in air breathing engines to do the legwork, instead of rocket fuel? Also, I'm so glad that we...
by SWGlassPit
Tue Nov 22, 2011 5:34 pm UTC
Forum: Coding
Topic: Unsigned int to ascii in C
Replies: 53
Views: 14664

Re: Unsigned int to ascii in C

headprogrammingczar wrote:sprintf should be enough to get you started.

I'm pretty sure he's supposed to be a little more bare-metal than that. Basic (if not even bitwise) operations.
by SWGlassPit
Sat Nov 12, 2011 5:55 am UTC
Forum: Coding
Topic: Code Bowling V: The Arithmetic Strikes Back!!!
Replies: 8
Views: 3785

Re: Code Bowling V: The Arithmetic Strikes Back!!!

I promise, this is 100% valid c++ code (with lots and lots of preprocessor abuse) that works properly. #inc\ lude <io\ stream> #def\ ine ra\ ccoon st\ d::cout #d\ efine s\ quirr\ el std:\ :cin #defi\ ne do\ g i\ nt #def\ ine ho\ rse ma\ in() #defin\ e ba\ by { #defi\ ne be\ ar <\ < #de\ fine ti\ ger...
by SWGlassPit
Wed Oct 19, 2011 10:35 pm UTC
Forum: Coding
Topic: interesting question about FORTRAN
Replies: 11
Views: 2973

Re: interesting question about FORTRAN

I would imagine it has something to do with type and bounds checking. No idea, though. Mine wouldn't even compile with the 25kx25k array. It said the array is too big.
by SWGlassPit
Wed Oct 12, 2011 7:11 pm UTC
Forum: News & Articles
Topic: City of Topeka repeals domestic abuse law
Replies: 18
Views: 2708

Re: City of Topeka repeals domestic abuse law

The city repealing the ordinance doesn't make it legal. Domestic violence still runs afoul of state law. All this does is it makes the case a state one, not a municipal one. Most city prosecutors aren't equipped to handle cases like this, so they're just taking it out of their hands.
by SWGlassPit
Thu Sep 29, 2011 1:36 pm UTC
Forum: The Help Desk
Topic: Setting up a Linux storage server
Replies: 4
Views: 2374

Re: Setting up a Linux storage server

I agree that Gentoo is not a good beginner distro, unless your side purpose is to learn the inner workings of Linux. A distro like Ubuntu will be relatively pain free.
by SWGlassPit
Tue Sep 27, 2011 8:38 pm UTC
Forum: Mathematics
Topic: A Variational Problem
Replies: 4
Views: 995

Re: A Variational Problem

You are indeed correct. The subscripts mean differentiating the functional with respect to the given function.
by SWGlassPit
Mon Sep 26, 2011 6:18 pm UTC
Forum: Mathematics
Topic: A Variational Problem
Replies: 4
Views: 995

Re: A Variational Problem

What you have is basically a classical isoperimetric variational problem. Following Theorem 1 from chapter 2, section 12.1 of the Gelfand-Fomin book, you need to find the function that solves: F_r - \frac{d}{d\theta}F_{r^\prime} + \lambda \left(G_r - \frac{d}{d\theta}G_{r^\prime} \right) = 0...
by SWGlassPit
Mon Aug 22, 2011 3:53 pm UTC
Forum: News & Articles
Topic: Nasa, perhaps this is a hint...
Replies: 37
Views: 6983

Re: Nasa, perhaps this is a hint...

not to mention http://www.twitter.com/NASATweetup <-- thanks to NASA's social media team, I got to see my first (the last) shuttle launch in person, from only three miles away. It is unREAL how loud it gets and how beautiful it is when it goes up.
by SWGlassPit
Tue Aug 09, 2011 1:34 pm UTC
Forum: News & Articles
Topic: Last Federal Helium Reserve, near Amarillo, is running out
Replies: 36
Views: 5780

Re: Last Federal Helium Reserve, near Amarillo, is running o

What, exactly, is helium better for than hydrogen? Okay, for low-energy physics it’s great. It gets colder, stays liquid colder, becomes an awesome superfluid better. Maybe some quantum computing applications. Doesn’t sound like a large amount is really needed for that. Providing a non-flammable at...
by SWGlassPit
Sun Jul 17, 2011 11:50 pm UTC
Forum: General
Topic: How do we know you have a face unless you post it?
Replies: 20910
Views: 3070878

Re: Postify your facerity

Pictures from my trip to Kennedy Space Center last week: 100_6632.JPG Me with astronaut Mike Massimino (he was on the last Hubble servicing mission) 100_6681.JPG The residents of the beach house I rented with astronaut Doug Wheelock (was on last mission, now deployed to Afghanistan) 100_6721.JPG Me ...
by SWGlassPit
Sun Jul 17, 2011 11:23 pm UTC
Forum: News & Articles
Topic: Space shuttle Atlantis in historic final lift-off
Replies: 36
Views: 5084

Re: Space shuttle Atlantis in historic final lift-off

I got to watch the launch from only 3 miles away. This is a pic of me the day before the launch. Best week of my life!
100_6675.JPG
by SWGlassPit
Thu Jul 07, 2011 1:49 pm UTC
Forum: General
Topic: Not to be a shameless self-promoter, but...
Replies: 3
Views: 1045

Not to be a shameless self-promoter, but...

I'm writing this from the Kennedy Space Center press site right now, and everyone here who is interested in the space program needs to follow the #NASATweetup hashtag on twitter right now through tomorrow! http://tristanmoody.files.wordpress.com/2011/07/100_6606.jpg?w=500 Watch us on ustream right n...
by SWGlassPit
Tue May 31, 2011 8:49 pm UTC
Forum: Fit Club
Topic: Run 10,000 miles
Replies: 1340
Views: 318517

Re: Run 10,000 miles

1430.9 + 18 = 1448.9
by SWGlassPit
Thu May 26, 2011 4:40 pm UTC
Forum: School
Topic: My school fails at computer security...
Replies: 314
Views: 117790

Re: My school fails at computer security...

The only problem, of course, being that duplicate MACs on a network can get a bit confusing, as your computer will be responding to traffic it didn't solicit.
by SWGlassPit
Thu May 26, 2011 4:09 pm UTC
Forum: News & Articles
Topic: Kansas state rep that compared rape to a flat tire
Replies: 23
Views: 2580

Re: Kansas state rep that compared rape to a flat tire

Just so you know, Mulvane is basically in BFE, and many in the statehouse, especially from rural Kansas, only have a high school diploma or less, so I'm not surprised about this.

*sigh*...Sometimes I hate this state.
by SWGlassPit
Tue May 24, 2011 1:39 pm UTC
Forum: Fit Club
Topic: Run 10,000 miles
Replies: 1340
Views: 318517

Re: Run 10,000 miles

1306 + 4 = 1310
by SWGlassPit
Tue May 24, 2011 1:36 pm UTC
Forum: Mathematics
Topic: Need help with Gaussian Elimination
Replies: 8
Views: 1283

Re: Need help with Gaussian Elimination

There are a couple reasons for doing LU-decomposition. Perhaps the biggest one is computational efficiency. While the decomposition is the same time complexity -- O(n^3) -- as Gaussian Elimination, using the decomposition to find a solution to Ax=b is only O(n^2) . For computations i...
by SWGlassPit
Mon May 23, 2011 1:19 am UTC
Forum: Fit Club
Topic: Run 10,000 miles
Replies: 1340
Views: 318517

Re: Run 10,000 miles

1270.8 + 10 = 1280.8

First run in a week. It was a bit miserable, honestly. Ran out of water with three miles to go, and my legs felt awkward the whole way.
by SWGlassPit
Mon May 23, 2011 1:03 am UTC
Forum: General
Topic: How'd you come up with your username(s)?
Replies: 1405
Views: 245623

Re: How'd you come up with your username(s)?

I played in the pit (keyboard instruments) in two different drum and bugle corps: the now-defunct Southwind, out of Lexington, KY, and the Glassmen, from Toledo, OH.
by SWGlassPit
Fri May 20, 2011 7:53 pm UTC
Forum: The Help Desk
Topic: Computer locking up...
Replies: 5
Views: 1077

Re: Computer locking up...

Couple other things you might consider: 1) You might make sure it's not a problem with the SATA channel you're on -- try changing SATA ports. It likely won't help, but it's easy to check. 2) Is there a possibility that your PSU is either faulty or underpowered for the hardware you have in the machin...
by SWGlassPit
Sun May 15, 2011 5:27 pm UTC
Forum: Fit Club
Topic: Run 10,000 miles
Replies: 1340
Views: 318517

Re: Run 10,000 miles

1160.6 + 16 = 1176.6

My legs are oww now.
by SWGlassPit
Sat May 07, 2011 6:09 am UTC
Forum: The Help Desk
Topic: Running a persistent process on Linux
Replies: 12
Views: 4239

Re: Running a persistent process on Linux

When you close a shell, it sends SIGHUP to all of its child processes. If you invoked your program as "nohup <processname> &", nohup traps and ignores SIGHUP so your program keeps on chugging away.
by SWGlassPit
Tue Apr 26, 2011 9:14 pm UTC
Forum: The Help Desk
Topic: Running a persistent process on Linux
Replies: 12
Views: 4239

Re: Running a persistent process on Linux

You can also just use

Code: Select all

nohup <command> &


wherein the "&" symbol automatically backgrounds the process without suspending it.
by SWGlassPit
Wed Mar 02, 2011 6:38 pm UTC
Forum: News & Articles
Topic: Wisconsin Governor battles Unions over budget. Dem Sens Flee
Replies: 371
Views: 34321

Re: Wisconsin Governor battles Unions over budget. Dem Sens

FOX just did a thing on showing how violent the protesters were since they would be yelling at and pushing the camera man and such. Really media? I don't know what to believe anymore, and what's fake. Oh, Tea Party is Satan. No, union protesters are! See! No, see! Did you notice the palm trees in t...
by SWGlassPit
Mon Feb 28, 2011 6:44 pm UTC
Forum: School
Topic: Advice about undergrad classes
Replies: 12
Views: 2534

Re: Advice about undergrad classes

See if you can do what I did: Dual enroll. Take only what you need to graduate for your undergrad hours, and take graduate courses as a graduate student so they actually count towards your masters.
by SWGlassPit
Mon Feb 28, 2011 6:35 pm UTC
Forum: Science
Topic: public misconceptions
Replies: 1073
Views: 152976

Re: public misconceptions

Define "better."
by SWGlassPit
Thu Dec 23, 2010 5:22 pm UTC
Forum: News & Articles
Topic: They hit the road, and the road hit back. Tragic :(
Replies: 14
Views: 1768

Re: They hit the road, and the road hit back. Tragic :(

I'm sure there will be a wrongful death suit against the state soon enough.
by SWGlassPit
Mon Dec 20, 2010 5:48 pm UTC
Forum: The Help Desk
Topic: Reliable, Flexible Web Host Needed!
Replies: 5
Views: 1226

Re: Reliable, Flexible Web Host Needed!

I use Nearly Free Speech. It gives me shell access, works fine with Drupal, and the best part: I only pay for exactly what i use, so my site costs me pennies a day.
by SWGlassPit
Sat Dec 11, 2010 5:11 am UTC
Forum: The Help Desk
Topic: Stepper Motor
Replies: 9
Views: 969

Re: Stepper Motor

Wikipedia page A stepper motor will not function without some electronics to drive it. Basically, the rotor is a permanent magnet, and the multiple wires coming out connect to stator coils. Each stator coil is controlled independently, so simply applying a current to two wires will just cause the r...

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