Showing posts with label Math. Show all posts
Showing posts with label Math. Show all posts

Monday, July 4, 2016

Fibonacci Sequence for Miles and Kilometers

Cool, but if you are runner you have all these memorized.

Wednesday, May 11, 2016

Count to 1023 on Your Fingers

Via @kfalconspb

Tuesday, January 28, 2014

Minority Report - Commerce Division

For get Sunday deliver. Forget delivery by drones. Amazon is going to use precogs to ship before you order.

Actual story at the WSJ via Slashdot.

Saturday, January 26, 2013


So, I'm not an engineer by education and I only have limited experience in ham radio, so the good news is I learn a lot when I take a few minutes to read something like the February 2013 QST.

In an article about how to hang wire antennas, I was introduced to the term catenary:
"In physics and geometry, the catenary is the curve that an idealized hanging chain or cable assumes under its own weight when supported only at its ends. The curve has a U-like shape, superficially similar in appearance to a parabola (though mathematically quite different)."
Of course, there is math to optimize the hanging of wires/cable. I just never thought about it beyond is the wire high enough that something won't run in to it and is it tight enough that it won't fall down in a few minutes after I let go.

Monday, April 9, 2012

Netflix Diversity

I wondered how they handled the different people in a household using the same Netflix account:
"Take as a first example the Top 10 row: this is our best guess at the ten titles you are most likely to enjoy. Of course, when we say “you”, we really mean everyone in your household. It is important to keep in mind that Netflix’ personalization is intended to handle a household that is likely to have different people with different tastes. That is why when you see your Top10, you are likely to discover items for dad, mom, the kids, or the whole family. Even for a single person household we want to appeal to your range of interests and moods. To achieve this, in many parts of our system we are not only optimizing for accuracy, but also for diversity."

Thursday, March 8, 2012

11 or II?

wesrucker247 RT @DesertVol: @wesrucker247 It's obvious now the preseason voters were using Roman numerals: II instead of 11 for UT.Sun, Mar 04 13:53:20 from TweetDeck