Search found 180 matches

by quadmaster
Fri Oct 20, 2017 10:17 pm UTC
Forum: Mathematics
Topic: Estimating Max with Only Definite Integrals
Replies: 14
Views: 5922

Re: Estimating Max with Only Definite Integrals

Thinking outside the box, could you use an analog envelope detector to narrow down the locations of the spikes? In the linked circuit diagram, the spikes can be found in the processed sample using far fewer samples than in the unprocessed sample: http://www.falstad.com/circuit/circuitjs.html?cct=$+1...
by quadmaster
Sun May 04, 2014 7:12 am UTC
Forum: Coding
Topic: Funniest/Most Annoying Code Comments
Replies: 662
Views: 140886

Re: Funniest/Most Annoying Code Comments

Some interesting python in an ancient physics engine teenage me wrote: magicsouljar=system.FillStateVector() try: system.checkLegality() except: return 0 system.FillFromStateVector(magicsouljar) And no, the questionable variable isn't referenced anywhere else, I checked.
by quadmaster
Wed Apr 23, 2014 4:15 pm UTC
Forum: Forum Games
Topic: What is in Your Clipboard?
Replies: 3674
Views: 595509

Re: What is in Your Clipboard?

JPanel green_slider_panel = new JPanel(); JLabel green_label = new JLabel("Green:"); green_slider_panel.setLayout(new BorderLayout()); green_slider_panel.add(green_label, BorderLayout.WEST); green_slider = new JSlider(0,100); green_slider.addChangeListener(this); green_slider_panel.add(gre...
by quadmaster
Wed Apr 23, 2014 1:51 am UTC
Forum: Forum Games
Topic: Corrupt-a-wish
Replies: 26023
Views: 2356336

Re: Corrupt-a-wish

Granted. Your family name is changed to studmuffin, and you retroactively have to endure the comments about your mom, Mrs. Studmuffin, thorughout middle school.

I wish I could mentally control the voltage across my right thumb and index finger.
by quadmaster
Tue Feb 25, 2014 6:10 am UTC
Forum: Mathematics
Topic: Generality of polynomial approximation
Replies: 7
Views: 2374

Generality of polynomial approximation

Intuitively I feel like for any continuous functions f and g where f>g on an interval [a, b] there exists a finite degree polynomial p such that f>p>g. However, I'm not sure how to approach a proof, or even whether my intuition is right. Does anyone have a hint?
by quadmaster
Sat Sep 28, 2013 11:46 pm UTC
Forum: Mathematics
Topic: Quantitative analysis of the temperature near a time portal
Replies: 7
Views: 2049

Quantitative analysis of the temperature near a time portal

This thought experiment came up in a discussion of consequences of time travel, I felt you guys would enjoy helping wrap up some of the math! Picture a perfectly insulated room. The left and right walls are a part of a time portal. Go through this portal from the left, and you come out p seconds in ...
by quadmaster
Sun Mar 10, 2013 9:13 pm UTC
Forum: Science
Topic: Favorite home experiments
Replies: 590
Views: 467058

Re: Favorite home experiments

Today I've had fun making a homopolar generator out of a very, very much abused hard drive, two brushes from a small motor, and a magnet.

http://www.youtube.com/watch?v=L0E-Na25 ... e=youtu.be
by quadmaster
Sun Mar 10, 2013 4:29 am UTC
Forum: Logic Puzzles
Topic: Pennies in Boxes
Replies: 85
Views: 51464

Re: Pennies in Boxes

once it's shredded by some means this is probably the tool to sort it with: http://www.youtube.com/watch?v=Yu6IQkLH8Rc
by quadmaster
Fri Mar 08, 2013 7:23 pm UTC
Forum: Mathematics
Topic: Question to resolve feud with math teacher
Replies: 2
Views: 1514

Question to resolve feud with math teacher

Intuitively it seems obvious to me that

Code: Select all

for all real x and for all positive d there exists a positive integer n such that abs(e^ix-e^i*n)<d
However, I can't manage to prove it more formally than 'well its true because pi is irational.' Any tips?
by quadmaster
Fri Mar 08, 2013 2:44 am UTC
Forum: Logic Puzzles
Topic: The truthteller and the politician
Replies: 65
Views: 25963

Re: The truthteller and the politician

Depending on the implementation of the problem, you could multiply two large primes and ask both for the factorization of the result, whichever can answer instantly is the truthteller.
by quadmaster
Fri Mar 08, 2013 2:09 am UTC
Forum: Forum Games
Topic: The answer is slimy.
Replies: 12
Views: 5585

Re: The answer is slimy.

Spoiler:
It's easy to forget that everyone in this subforum is 2000% genius. sorry about the pointless thread.
by quadmaster
Fri Mar 08, 2013 1:54 am UTC
Forum: Forum Games
Topic: The answer is slimy.
Replies: 12
Views: 5585

The answer is slimy.

Enough like Enough,
women like women,
nation like nation,
ghoti like ____
by quadmaster
Wed Feb 27, 2013 6:20 pm UTC
Forum: Science
Topic: EMDrive and other reactionless propulsion claims
Replies: 71
Views: 16122

Re: China Picks up the EMDrive

Of course you could always just take a jet engine and replace the combustion chamber with a heating element or even just an arc gap with a few tens of thousands of amps
by quadmaster
Tue Feb 26, 2013 11:10 pm UTC
Forum: Science
Topic: Higgs boson analogy question
Replies: 5
Views: 2418

Re: Higgs boson analogy question

And as I suspected, now I don't get it at all. :D So the two explanations, that higgs bosons oscilating the long way bind to the w and z bosons and give them mass vs the potential energy from interacting with the higgs field acts as mass. I am assuming this is some sort of 'light is a wave, light is...
by quadmaster
Tue Feb 26, 2013 2:56 am UTC
Forum: Science
Topic: Higgs boson analogy question
Replies: 5
Views: 2418

Re: Higgs boson analogy question

Awesome, thanks so much!
It's been bugging me for a while to keep seeing htis in the news and not really understand it! Of course, given quantum physics is involved I probablyam still only scratching the surface, but it's a big improvement!
by quadmaster
Tue Feb 26, 2013 2:13 am UTC
Forum: Science
Topic: Higgs boson analogy question
Replies: 5
Views: 2418

Higgs boson analogy question

The description I keep getting of the higgs field and how it causes particles to have mass is that it drags on them like maple syrup smacks to me of bullshit, seeing as that’s not at all how I’ve been taught mass works. I read that it’s the interaction of the Higgs field with W and Z bosons that giv...
by quadmaster
Mon Feb 25, 2013 3:12 am UTC
Forum: Logic Puzzles
Topic: Conformist code
Replies: 5
Views: 3122

Re: Conformist code

Spoiler:
thirdparty got it, in the future I think i need to be more careful in my handwriting when doing cryptography!
by quadmaster
Fri Feb 22, 2013 8:36 pm UTC
Forum: Logic Puzzles
Topic: Conformist code
Replies: 5
Views: 3122

Conformist code

Presumably this will be translated in about half an hour, but it still is kinda entertaining. It's not very transparent to traditional cryptographic techniques

1qazaqwedc765tghjhgbnm8ik,./ 1qazxc5tgbnmju76 321qasdsaz765tghjmjhgb9ol. zaq12wdcfr4678ikmnbhy
by quadmaster
Wed Oct 03, 2012 1:23 am UTC
Forum: Forum Games
Topic: Can you produce [X] in less than 15 seconds?
Replies: 7582
Views: 714154

Re: Can you produce [X] in less than 15 seconds?

No, but my laptop is on the table that held my (now broken) keyboard :(

OS install disk?
by quadmaster
Fri Apr 06, 2012 2:01 am UTC
Forum: General
Topic: Lucky Ten Thousand (TIL)
Replies: 13416
Views: 1665810

Re: Today I Learned

Today I learned that unsurprisingly, Mercury (I) fluoride is a terrifying chemical.
by quadmaster
Mon Jan 30, 2012 3:19 am UTC
Forum: Science
Topic: Favorite home experiments
Replies: 590
Views: 467058

Re: Favorite home experiments

If you have a laser pointer and two adjacent fingers on the same hand, you can get single slit diffraction patterns by shining the laser through the gap in your fingers (although aligning everything might take several seconds of practice.) It's about the fastest home experiment I can think of, and i...
by quadmaster
Mon Dec 05, 2011 11:18 pm UTC
Forum: Science
Topic: Cloud chamber effect in supercooled water or other liquids
Replies: 2
Views: 1169

Cloud chamber effect in supercooled water or other liquids

Basically, if you super-cool water and hit it with a radio-particle, will it nucleate ice formation? Will it do it in such a way that the path of the particle can be discerned from the resulting ice?
by quadmaster
Wed Nov 30, 2011 12:21 am UTC
Forum: Science
Topic: Bad science jokes!
Replies: 100
Views: 35145

Re: Bad science jokes!

Why did Euler get famous for looking in his toilet?

he found a natural log.
by quadmaster
Wed Nov 30, 2011 12:04 am UTC
Forum: Science
Topic: Miscellaneous Science Questions
Replies: 2927
Views: 693884

Re: RELATIVITY QUESTIONS! (and other common queries)

How are you spinning up and spinning down the disks? I guess a keyed shaft isn't what you are looking for here? I guess some sort of storage device on the main ship, like batteries, and wires to motor/generators that move with the disks? Oh I think I see. Matter=energy, and so, while this moves ene...
by quadmaster
Tue Nov 29, 2011 2:34 am UTC
Forum: Science
Topic: Miscellaneous Science Questions
Replies: 2927
Views: 693884

Re: RELATIVITY QUESTIONS! (and other common queries)

Ok, last question: why couldn't a (hypothetically) a reactionless spaceship drive be made by alternately spinning up and stopping two coaxial disks while accelerating them back and forth? Disks are launched towards front of spaceship ==> disks are spun up during transit to front of spaceship ==> at ...
by quadmaster
Mon Nov 28, 2011 11:41 pm UTC
Forum: Science
Topic: Miscellaneous Science Questions
Replies: 2927
Views: 693884

Re: RELATIVITY QUESTIONS! (and other common queries)

So, does it take more force to accelerate a rotating disk along it's axis than a non-rotating disk?
by quadmaster
Mon Nov 28, 2011 2:40 am UTC
Forum: Science
Topic: Miscellaneous Science Questions
Replies: 2927
Views: 693884

Re: RELATIVITY QUESTIONS! (and other common queries)

What happens if a solid disk is spun so that particles near the diameter are moving at an appreciable fraction of the speed of light? If the outside is looked at as, say, twenty seperate chunks, then each one should decrease in length in the direction of motion, if I understand special relativity. H...
by quadmaster
Mon Oct 31, 2011 4:15 am UTC
Forum: General
Topic: The Flat Earth Society
Replies: 121
Views: 69104

Re: The Flat Earth Society

I would like to point out that the FE'ers just caused a (minor) religious flame-war in a different forum in a thread that none of them have ever posted in or even know exist.

Trolls of the FE forums, my hat goes off to you. You will never know the extent of your victory.
by quadmaster
Mon Oct 10, 2011 4:54 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0962: "The Corliss Resolution"
Replies: 62
Views: 19776

Re: 0962 "The Corliss Resolution"

The wingsuit? Yup.

Also, this comic reminded me of this: Kiwi.

I had almost gotten over the depression from watching that video the first time.
by quadmaster
Wed Sep 21, 2011 8:00 am UTC
Forum: General
Topic: Omegle!
Replies: 701
Views: 127847

Re: Omegle!

You're now chatting with a random stranger. Say hi! Question to discuss: can you tell me in detail how you masturbate ? You: ░░░░░▄▄▄▄▀▀▀▀▀▀▀▀▄▄▄▄▄▄░░░░░░░ ░░░░░█░░░░▒▒▒▒▒▒▒▒▒▒▒▒░░▀▀▄░░░░ ░░░░█░░░▒▒▒▒▒▒░░░░░░░░▒▒▒░░█░░░ ░░░█░░░░░░▄██▀▄▄░░░░░▄▄▄░░░░█░░ ░▄▀▒▄▄▄▒░█▀▀▀▀▄▄█░░░██▄▄█░░░░█░ █░▒█▒▄░▀▄▄▄...
by quadmaster
Wed Sep 07, 2011 11:17 pm UTC
Forum: General
Topic: The "How Have I Never Noticed That Before?" thread
Replies: 1141
Views: 192492

Re: The "How Have I Never Noticed That Before?" thread?

Colonel is pronounced kernel.

When I was first told this, it took three people and a trip to wikipedia to convince me I wasn't being pranked.
by quadmaster
Mon Aug 22, 2011 2:42 am UTC
Forum: General
Topic: Bathroom Graffiti
Replies: 37
Views: 6276

Re: Bathroom Graffiti

I've mostly graphittied with goggles.

http://goggles.sneakygcr.net/

does that count?
by quadmaster
Fri Aug 12, 2011 7:30 pm UTC
Forum: Mathematics
Topic: Minecraft Shorelines are loops?
Replies: 18
Views: 2913

Minecraft Shorelines are loops?

If, on a minecraft map, you pick a shoreline near your spawn point and start following it, what is the probability that you will end up back where you started? My intuition says it is 1, but I don't know how to prove it. (For this problem I think you can pretend a minecraft map is infinite, but I am...
by quadmaster
Wed Jul 27, 2011 4:13 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0930: "Days of the Week"
Replies: 126
Views: 28151

0930: "Days of the Week"

Image
http://xkcd.com/930/
Not pictured: the elongated Halley's-Comet-like orbit of every Rebecca Black lyric.

I'm most interested in the breakup orbit. I wonder if it coorelates with my experiences *checks facebook history
by quadmaster
Fri Jul 22, 2011 5:38 pm UTC
Forum: General
Topic: Thoughts for ships
Replies: 90155
Views: 8807838

Re: Screechings of the Great Unwashed (Pander to the Borg)

One of my closest friend's mom's died and the memorial service is today and she's in denial and didn't tell her best friend about any of it and now her best friend is freaking out and won't go because she thinks the other doesn't want her there and oh god what
by quadmaster
Thu Jun 02, 2011 2:55 pm UTC
Forum: Logic Puzzles
Topic: The Ungoogleable
Replies: 128
Views: 82210

Re: The Ungoogleable

One thing I have struggled hugely with was finding the Terezi-Dave Dance Party gifs from Homestuck. Because they are images not embedded in webpages, and so have no text, and are not indexed on the website, they are very difficult to find.
by quadmaster
Wed Jun 01, 2011 1:57 am UTC
Forum: Logic Puzzles
Topic: Which coin?
Replies: 10
Views: 3466

Re: Which coin?

Spoiler:
Well, that was over quickly. Image
by quadmaster
Tue May 31, 2011 3:11 pm UTC
Forum: Logic Puzzles
Topic: Which coin?
Replies: 10
Views: 3466

Which coin?

Having been convicted of gambling, you step forward over the hardwood floor to the judge's table in order to receive your sentence. He puts down his glass of water and hands you two pennies. One of them is unmodified, the other has been bent into a shallow cup, with heads on the inside and tails on ...
by quadmaster
Sun May 08, 2011 2:11 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0657: "Movie Narrative Charts"
Replies: 337
Views: 145181

Re: 0657: "Movie Narrative Charts"

If anyone here has read Homestuck and is interested, we're starting a chart for it here.
It promises to be a bit of a challenge :)

Go to advanced search