Month: February 2010
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Calculating LT50 (median lethal temperature, aka LD50) quickly in R
Say you’ve got a bunch of survival/mortality data from an experiment. Maybe you exposed batches of snails to various high temperatures for a few hours, and recorded the number alive and dead in each batch at the end. Now you’d like to report the median lethal temperature (or perhaps a lethal dosage if you were…
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Thermocouple datalogger – the USB-501TC
In 2008, Measurement Computing released a self-contained datalogger that will record temperatures from a thermocouple continuously. The USB-501TC will read 32,510 temperature samples, each time-stamped. It will read K, J, and T-type thermocouples, and ships with the K-type thermocouple shown in the picture. The temperature readings can be taken at a number of intervals ranging…
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New arrangement
Blogger decided to stop supporting users that hosted material on their own sites, so I’ve begun the transition to WordPress. The old material from my “Stuff” journal still exists, and the highlights are listed on the Archive page.
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