December 27, 2015

pragmatic edc

Lots of folks wax poetic about their every day carry kit, and then include things like fishing hooks. That might make a “pragmatic hiking edc” kit, but I’m interested in some of the more realistic things that might happen: Phone is dead and need to call someone (wife, parent, car insurance company, whatever) but don’t have the relevant phone number / insurance number / etc. Minor illness like headache, indigestion, things like that.

November 17, 2015

recent projects - sous vide, hydroponic pump, and another table

I’ve been working on a few fun projects recently. First: I built a temperature controller out of a crock pot and a cheap import temperature controller. It looks like this: ![temperature controller top]({{ site.baseurl }}/assets/temperature_controller_top_s.jpg) ![temperature controller bottom]({{ site.baseurl }}/assets/temperature_controller_bottom_s.jpg) I’ve used it to cook eggs and steak. Both turned out great! Here’s the only shots I got of the steak: ![steak vacuum sealed]({{ site.baseurl }}/assets/steak_vacuum_sealed_s.jpg) ![steak cooking]({{ site.baseurl }}/assets/steak_cooking_s.jpg)

August 23, 2015

life pro tip curb rampant consumerism by identifying actual needs

A while back, I realized that I wanted a nice digital SLR camera. Before I bought it, I made a list of all the things that I wanted to do with it. Ultimately, this ended up being a sort of self-justification for buying it, but it did serve one deeper purpose: I now had a list of about 20 things that I had committed to doing with my new camera. So while it didn’t actually prevent me from being rampantly consumerist, I did have a whole set of worthwhile things to do with my new camera!

August 19, 2015

build_json.sh

This might seem silly, but I’ve beeing playing with some json.sh scripts that build legitimate json bodies and are easily filled into a shell script variable as needed. The basic driving idea was that there are lots of slick ways to pull data out of JSON(either by programming something with python’s json or running a command line tool like jq or whatever), but not as many friendly ways to build some JSON out of a given token or whatever.

June 7, 2015

carputer brainstorming ideas

As much as I enjoy driving, radio almost always annoys me. There’s a couple of particularly terrible stations and commercials around, but even the least objectionable of the pack really bother me. The focus did come with an auxiliary stereo input plug, which we have used extensively, but even that seems to have some shortcomings. In particular, one of the things I really miss about the radio approach is just that I don’t really need to think that much about it – it is just there while I’m driving around.

May 16, 2015

car is paid off!

I finally sent the last check for my 2013 Ford Focus a couple of weeks ago, and finally got the title in the mail today. It also came with a “congratulations for paying off your car!” letter, which was a nice touch. I opted to pay it off early, despite the (moderate) financial disadvantage it put me at. The loan was only 2.4%, so the cost of carrying the loan actually wasn’t super significant.

November 19, 2014

slide rules

Suppose you want to evaluate the multiplication problem $C = A\cdot B$. But you forgot your times tables, so you are stuck using your expedition watch or something. In fact, you can even make your own out of a couple of slips of paper, if you really need to. First bit of background: One of the rules you probably learned and I definitely forgot was the rule of logs: $$ C = A\cdot B \equiv \log C = \log(A\cdot B) = \log A + \log B$$ This ends up being useful for slide rules, because you can easily add distances together by putting two things next to eachother!

October 28, 2014

debugging internet

My standard plan for debugging internet connections: Can we reach stuff from some other device? Usually, connection problems are something like “My iPad isn’t working,” which is caused by a flash of light in the sky, like when Swamp gas from a weather balloon gets trapped in a thermal pocket and reflects the light from Venus." So try something other than your iPad on your WiFi to isolate whether it is a WiFi network problem or a “iPad"problem.

October 15, 2014

don't poll

A while ago, I wrote down a list of clever life rules in my day-to-day notebook. One of them was “don’t poll”. To say a bit more about it, don’t spent time waiting for things to finish and checking them constantly. A more concrete example: I find myself running terminal commands that take ~5 minutes, and then wasting ~5 minutes watching them. This is pretty stupid. So what I have started doing instead is run something like $ some_long_command [ .

September 26, 2014

logging

In grad school, I spent a lot of time writing code that read output from nonlinear optimization solvers, and tried to do useful things with it. A much better way to do that is called “structured logging”, an idea I experimented with a bit during grad school. It has also been coming up in my working life, so I wanted to delve into it a bit deeper. For a quick introduction, check out Thoughts on Logging.