Riddler Classic – 10-14-2016 – Arbitraria

Here’s my solution to this weeks Riddler Classic puzzle from FiveThirtyEight.  Here’s the question: “While traveling in the Kingdom of Arbitraria, you are accused of a heinous crime. Arbitraria decides who’s guilty or innocent not through a court system, but a board game. It’s played on a simple board: a track with sequential spaces numbered from 0 to 1,000. The zero space is marked “start,” and your token is placed on it. You are handed a fair six-sided die and three coins. You are allowed to place the coins on three different (nonzero) spaces. Once placed, the coins may not be moved. Continue reading “Riddler Classic – 10-14-2016 – Arbitraria”

Riddler Express – 10-14-16 – Turning Coins Over

Here’s my solution to this week’s Riddler Express question from FiveThirtyEight.  Here’s the question: “You place 100 coins heads up in a row and number them by position, with the coin all the way on the left No. 1 and the one on the rightmost edge No. 100. Next, for every number N, from 1 to 100, you flip over every coin whose position is a multiple of N. For example, first you’ll flip over all the coins, because every number is a multiple of 1. Then you’ll flip over all the even-numbered coins, because they’re multiples of 2. Then you’ll flip coins No. 3, 6, 9, 12 … And so on. What do the coins look like when you’re done? Specifically, which coins are heads down?”

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Photo Friday -Toulouse Church


This is from the Church of the Jacobins from Toulouse, France.  In particular, it’s a view of a column in the sanctuary of the church.  At the top of the column, it radiates out in a palm tree design to support the roof.  The photo doesn’t really show the height of the ceiling and how light and airy it makes the room feel along with the huge stained glass panels.  This is definitely a must see in Toulouse.

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Photo Friday – St. Emilion Church

This photo is from St. Emilion, a famous wine growing region just outside of Bordeaux in France.  I loved the way the sun was shining through the tree and the great texture in the church tower and the sky.  This shot has so much dynamic range that the camera couldn’t capture it all so the highlights are blown out and the tower was deep in shadow.  I fixed it as much as possible but the sky still wasn’t working for me – black and white to the rescue!

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Storing GPS Location in Photo Pixels

A few years ago I was working on a project using a multi-rotor UAS to monitor weather.  While out in the field, the user needed to be able to see the location of the UAS on a satellite map.  The UAS had a GPS and was capable of transmitting that back to the laptop running custom ground station software; however, a constant connection to the internet would be necessary to get satellite maps from Google and many places this would be used won’t have a reliable signal.  So I rolled my own solution to fetch the map from Google ahead of time and save it as an image file, which works fine since the location would be known in advance.  The challenge was that I needed to have GPS coordinates associated with the image.  Instead of having the GPS coordinates in a separate file, I decided to alter the pixels in the image to store the GPS coordinates so that only one file was necessary.

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Photo Friday – Marseille Boats

This was taken on a recent trip to France.  After presenting at a conference in Toulouse, I went to Marseille for a few days to explore.  While it wasn’t my favorite city, I did get a few great pictures and got to see the Chateau d’If.  The light was hard because it was the middle of the day so I converted to black and white to try to give it some drama.

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