I’ve been backing up some of my larger files to Bluray lately, instead of trying to upload them over a 10 Mbps uplink.
In the past, I used GPG (on a .tar or compressed .tar.xz) or Veracrypt (on a file container) to encrypt at rest, before burning those files onto a standard UDF/ISO9660 optical disc. Now that I use a Linux desktop, I wanted something slightly more native — a method that
protects the directory structure and filenames without needing to use an archive file (like .tar);
would be generally unintelligible on a Windows PC (this is a feature, not a bug); and
could be scripted on the command line for server backups, without requiring a GUI.
Based on some resources online, I settled on using LUKS.
Microsoft’s Facebook ad for new features in Excel highlights the Treemap visualization, but gets it totally wrong.
A treemap is supposed to visualize relative size in a hierarchy. But in the illustration here, the data don’t fit this type of visualization (it’s a time series of one flat variable—without hierarchy).
But it’s even worse than that. The relative sizes don’t make sense! Why would the 31 MPG box for January be so much larger than the 32 MPG box for May?
This seems like a great illustration of why math/statistical education should be required for everyone—even visual designers and marketers. Or at least, the people selling the product should understand what the software actually does.
The form doesn’t accept non-Canadian provinces/territories and postal codes!
It’s really foolish, because many of the people who would be filing this form are likely residing outside of Canada. That’s why this version of the T1 return has an added Country field in the address block.
This is the kind of situation when PDF forms should just step back and allow free-form, unvalidated input.
This post ties together some of my favourite things: 2D barcodes, high speed automation, printers, cryptographic signatures (!), postal mail and postage, fraud prevention, and even a little bit about patents!