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Open Lab Notebook

Brief updates on my daily work. For more polished postings about math, collective behavior, research collaborations, and such, see News and Research.

I hope to work toward a more complete open notebook: for now I'm only posting updates on some of my work.

Publish Date: 
Thu, 04/14/2011 - 13:01

We are wondering about the theory of social norms and female genital cutting (FGC) in Africa. There are anecdotal reports that international workers have visited a village, started a conversation - without taking a position - about whether people think FGC should continue, and that alone stimulated the community to decide to give up FGC.

Publish Date: 
Mon, 04/11/2011 - 17:05

Getting ready for the WW release. Fixed three outstanding bugs, including one that a user discovered earlier today.

Publish Date: 
Thu, 04/07/2011 - 18:46

Bringing the experiments I've been doing into the wiki's makefile. Also bringing in the results from that big job I started last week.

The mean probability of fixation vs. in degree looks about perfect (it's supposed to be a straight line with slope of -1):

Publish Date: 
Wed, 04/06/2011 - 11:59

Cleaned up the working copy of the WW source code on lalashan, caused a brief crash of the lalashan wikis due to some kind of php code caching in the web server, I think. Then spent part of the afternoon trying to track down a weird malfunction in the Refs project (which is a local lalashan thing), which as far as I can tell isn't due to my changes, but that seems like too weird of a coincidence. Fortunately, all seems well now.

Publish Date: 
Mon, 04/04/2011 - 23:40

I'm down to the last few bugs to fix before releasing WorkingWiki to the world. (There are plenty more bugs, but for whatever reasons I don't think the release needs to wait on the rest of them. The main thing is I just want to do away with bugs that will make the software look bad to people who are just trying it out for the first time.)

Publish Date: 
Fri, 04/01/2011 - 17:01

Today on my schedule is "data analysis day", but actually a lot of it has been meeting with people. The data analysis part of it comes down to tracking down the source of a bad result on a linear model our team's been trying to run. We were concerned the Hauck-Donner effect, which I have never heard of before, might be happening to us, but it turned out to be something simpler: a new variable that had been added to the model has NA values except when the dependent variable is equal to "No".

Publish Date: 
Thu, 03/31/2011 - 16:53

This is like the plot I made yesterday, but starting with all the vertices of high out degree rather than high in degree. It's supposed to drop vertically to the diagonal, and then go to either the lower left or upper right.

Publish Date: 
Wed, 03/30/2011 - 00:47

Added an Update subclass to do the WW directory cleaning after the page is served, when nobody's waiting. Also spent about an hour helping students with wiki-related questions.

Publish Date: 
Mon, 03/28/2011 - 22:31

When people preview their work in the wikis, we create a copy of the WW working directory so that the files they're previewing are kept separate from the saved version of the files. When they save we take care of the copies, but when they decide to abandon their changes we get stuck with copies of directories hanging around forever. Background jobs and plain old persistent project directories can also get "orphaned" and need to be cleared away, but the preview sessions are the ones that pile up fast and thick.

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