kpreid: (Default)
2011-08-28 09:21 am
Entry tags:

Funny cat videos? Bah. Have a funny machine video.

Source: What is it? set 403 (a weekly "Identify these objects" puzzle).

kpreid: (Default)
2010-12-06 07:59 am
Entry tags:

YRFOTD #2

10,000 minutes ≈ 1 week

kpreid: (Default)
2010-10-04 06:39 pm
Entry tags:

(no subject)

x {UleavesTair,avg}d x 0     when t now (mod 1 solar year)
dt
kpreid: (Default)
2010-08-05 04:51 pm
Entry tags:

The hazards of working with MarkM

“The most important constraint [on naming this] is that it's a good pun.”

kpreid: (Default)
2010-07-14 08:33 am

(no subject)

It appears that everyone From The Internet lives in California.

kpreid: (Default)
2010-04-01 08:33 am
Entry tags:

Your random fact of the day

2000 food calories/day ≈ 100 watts

kpreid: (Default)
2010-02-27 09:31 pm

Things I had not done before entering college

Normal People Things:

  • Gone to a party unrelated to my family.

Never thought I'd do:

  • Worn a t-shirt with text on it.
  • Written an essay structured using a gratuitous extended metaphor.

Extra nerd points:

  • Programmed a number type which carries units and error values, to reduce the tedium of lab reports.
  • Learned to write all my assignments in LATEX.
kpreid: (Default)
2009-12-14 09:56 pm

And now for something utterly internet-pop-culturish

Photo taken by me in a Staples store. Text added with Zach Beane's roflbot.

kpreid: (Default)
2009-09-10 08:39 pm

an approximation, the usefulness of which depends on the application

Java programming class (yes, I know Java already) today, introducing loops. Task: write a factorial program. I wrote mine to use int arithmetic if possible, floating-point if not. Test the edge cases, of course. It says:

500! ≈ Infinity

I'm glad I used the “approximately equals” sign.

kpreid: (Default)
2009-05-13 01:44 pm
Entry tags:

The overstuffed ballot box

I get the feeling the textbook writers had a list of everyday objects which they randomly picked from to avoid saying “an object” in each exercise. The results are mostly just distracting or mildly amusing, but sometimes they're a bit too much:

Sample Problem 9-6One-dimensional explosion: A ballot box with mass m = 6.0 kg slides with speed v = 4.0 m/s across a frictionless floor in the positive direction of an x axis. The box explodes into two pieces. One piece, with mass m_1 = 2.0 kg, moves in the positive direction of the x axis at v_1 = 8.0 m/s. What is the velocity of the second piece, with mass m_2?

— Halliday, Resnick, Walker, Fundamentals of Physics, 8th ed., page 215

kpreid: (Default)
2009-03-21 11:40 am
Entry tags:

Confused yet?

While setting up my new laptop, I found this situation:

I had three mounted volumes all named kpreid. Luckily, they were of different types so they could be distinguished by icon.