ground- water, geo- statistics, environmental- engineering, earth- science

Archive for June, 2019

What are Random Numbers?

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I did a wonderful #statistics experiment with students in stats class the other day on random numbers:

I divided the class into two groups. I gave a coin to one group and told them to flip this coin 20 times and record the resulting sequence of heads and tails. I asked the other group to come up with sequence of heads and tails in their heads and record the best sequence they can come up with. I told them I would leave the room and come back after five minutes, look at both sequences, and tell them which was created by the coin and which one in the heads of the other group.

These are the two sequences they came up with




Two “random” sequences created during statistics-class. Which one was created by a coin-flipping experiment?

Can you guess which sequence was constructed by what group?

Here is some background:

Written by Claus

June 24th, 2019 at 4:25 pm

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ssh fun

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I have setup a raspberry pi as a measurement computer. Now I can access it

a) on my Mac by mounting a directory, using SSHFS 2.5.0 via

sshfs -o volname="<MOUNT_NAME>" <USER>@<IP_ADRESS>:<directory_on_raspberry> <directory_on_my_mac>

b) on my iPad! I use OpenTerm to ssh into the machine, run scripts, and I use ShellFish (currently in beta) to basically mount the directory with the output into the file system (I mean into the Files App) on my iPad.


Written by Claus

June 14th, 2019 at 1:41 pm

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Starting a New Blog

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I had linked to a post by Peter Rukvina’s last time. I am doing it again – this time he linked to Rosie, who started a blog in 2019 called “press pound”.

I can’t applaud Peter’s comment enough:

I’m happy to see the corner turn from “why did blogging die when we loved it so?” to “I’m going to start a new blog!”

Written by Claus

June 11th, 2019 at 12:57 pm

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