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by iwonder
September 6th, 2019, 7:46 am
Forum: Study Events
Topic: Codebusters C
Replies: 17
Views: 687

Re: Codebusters C

Chinese Remainder Theorem, Fermat's Little Theorem, Euler totient functions
Man those proofs still give me nightmares...
by iwonder
September 6th, 2019, 5:54 am
Forum: Gravity Vehicle C
Topic: Braking
Replies: 3
Views: 214

Re: Braking

Some sort of light oil will help friction, and while threads do have different 'fits', going a size up won't help much. If it's too tight you could run a tap through the wingnut a few times and probably get it to fit a little more loose. If you go plastic you can 'break in' the wingnut by running it...
by iwonder
September 6th, 2019, 5:44 am
Forum: Study Events
Topic: Codebusters C
Replies: 17
Views: 687

Re: Codebusters C

Thanks for all the insight guys, I appreciate it. I agree that the rules place fewer restrictions on the aristocrat style ciphers, and I like the point that they could be more creatively asked. Maybe next time we can get a ruleset that opens the floor to math related cipher questions that y'all don'...
by iwonder
September 5th, 2019, 6:16 am
Forum: Study Events
Topic: Codebusters C
Replies: 17
Views: 687

Re: Codebusters C

The distinction to me is that with the aristocrat style ciphers, you can get better with practice, but there's not a large amount of study that could be done to get better. With mathematic style ciphers, you're right, it's less practice (more study), but I would argue that if all you see is the same...
by iwonder
September 4th, 2019, 9:16 am
Forum: Feedback
Topic: September 2019 Update Problems - Comprehensive Thread
Replies: 11
Views: 330

Re: September 2019 Update Problems - Comprehensive Thread

It's the brackets in your name. Pretty interesting that it works in phpBB.
by iwonder
September 3rd, 2019, 10:01 pm
Forum: Study Events
Topic: Codebusters C
Replies: 17
Views: 687

Re: Codebusters C

Looking for opinions here, I'm curious what everyone else thinks of the rules. I've always wished they'd lean more towards the cryptography/math intensive problems and shy away from the monoalphabetic tasks (I see them as more repetitive, less thought provoking). Each year so far the rules have move...
by iwonder
August 12th, 2016, 10:35 am
Forum: General Chat
Topic: Your Daily Random Comment
Replies: 24093
Views: 1385332

Re: Your Daily Random Comment

Found this gem while browsing through a really old rocks and minerals binder:
Look at the date and the logo
[img]http://i.imgur.com/J5OgRxl.jpg[/img]



am I old now
I was in highschool... Competing in SO...
by iwonder
July 25th, 2016, 10:07 am
Forum: 2016 Invitationals, Regionals, and States
Topic: Texas 2016
Replies: 89
Views: 16757

Re: Texas 2016

As a competitor from Boca, Ill share our reasoning. We went to Cyfalls last year because it was an early tournament (Nov 3 I think) that was relatively competitive. That was pretty much the only reason we went. We are going to the Cornell invite instead of cyfalls because they moved their tournamen...
by iwonder
April 27th, 2016, 9:23 pm
Forum: 2016 Invitationals, Regionals, and States
Topic: Appeal to Nationals on State decision
Replies: 16
Views: 3528

Re: Appeal to Nationals on State decision

sciolyfan, word of advice. Work as hard as you can. Do as much as you can do. Give zero, zero, cares about what happens to other people. And do not, do not feel the inclination to police a scioly tournament. It's not your job, you've got better things to do. (Like beat them the old fashioned way).
by iwonder
April 2nd, 2016, 11:30 am
Forum: Posting Games
Topic: SciOly Assassination 106: Curtain Call
Replies: 210
Views: 19623

Re: SciOly Assassination 106: Curtain Call

Aww, i might be a bit late on this, but I think this might be a solution to the clue. Hmm let's see.
Lol you're never going to give it up are you? But you know the rules and so do I. Don't tell me you're too blind to see it. You know the game and you've got to play it.
by iwonder
March 26th, 2016, 10:32 am
Forum: Electric Vehicle C
Topic: Motor Breaking HELP
Replies: 23
Views: 3138

Re: Motor Breaking HELP

Alright, fine. One axle has a wingnut brake, the other has a motor, that's what we're talking about, right? There's already some sort of switch to turn off the motor. Using that switch, remove the battery and put say a 3-5 ohm resistor across it instead. The motor wouldn't 'slam on' the brakes, beca...
by iwonder
March 25th, 2016, 6:41 pm
Forum: Electric Vehicle C
Topic: Motor Breaking HELP
Replies: 23
Views: 3138

Re: Motor Breaking HELP

Braking with both axles should help because there will be more contact with the floor thus the coefficient of friction should be increased No thats not why. The coefficient of friction depends only on the material, not contact area. But friction force is friction coefficient times normal force so y...
by iwonder
March 24th, 2016, 8:45 am
Forum: Electric Vehicle C
Topic: Motor Breaking HELP
Replies: 23
Views: 3138

Re: Motor Breaking HELP

The way it sounds you're only using 1 of 2 axles to brake right now, anything you can do to brake with both axles will help dramatically.
Would it? In theory it shouldn't.
How wouldn't it?
by iwonder
March 22nd, 2016, 8:24 pm
Forum: Electric Vehicle C
Topic: EV Scores at Nationals
Replies: 20
Views: 3268

Re: EV Scores at Nationals

Rules clarification allows vehicles to go backwards. Just saying. Personally, if I were an ES for this I would put a wall 1m after the line. It's an interesting solution but there's no guarantee of space to do it in. Planning on it or making arguments that try to supplant math/physics calculations ...
by iwonder
March 22nd, 2016, 8:20 pm
Forum: Electric Vehicle C
Topic: Motor Breaking HELP
Replies: 23
Views: 3138

Re: Motor Breaking HELP

The capacitor is an interesting idea, it'd need to be very large, but it might work well. You could also probably set up the switch (double throw) to short the motor together when it's enabled, shorting the motor will make it act like a brake for smaller DC motors (large motors will need a resistor ...

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