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IB Physics Imaging option: Magnification of optical instruments
Take note of sign conventions!
Magnifying glasses
A single convex lens can be used as a magnifying glass.
If an object \(O\) is placed within the focal point \(F\) of a convex lens, a virtual image \(I\) will be formed.
The linear magnification \(m\) of… »
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Thoughts on Black Mirror S03E04 ‘San Junipero’
‘San Junipero’ is, without a doubt, one of the most unique episodes of Black Mirror in all its three seasons. Unlike the other episodes, which are primarily straightforward one-sided criticisms of particular aspects of technology and society, ‘San Junipero’ deals with deeper, more thoughtful questions… »
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Decentralised open-source self-hosted encrypted cloud services
A number of years ago, after reflecting on how dependent I was on Google's cloud services, I began to migrate to open-source self-hosted solutions, primarily through ownCloud. After a recent server outage left me without service for a substantial period, however, I began the search… »
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FIX: Systemd services fail with code 228/SECCOMP
Symptoms
Services like systemd-journald and systemd-logind show a failed state with error code 228/SECCOMP, and return an error message when attempted to be started using systemctl. This also caused journald logs to not be created or updated for any services.
Problem
The problem on my… »
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An even smarterer html_truncate tag for Jekyll
As you know, I am using Jekyll to generate this blog. When setting mine up I read how Benjamin Thomas read how Jack Moffitt set up his Jekyll installation, and thought the idea of an html_truncate filter was pretty cool, and thought the… »
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Mini vMac with colour (on Linux)
Notice 2020-10-30
This post is several years old and is now out-of-date. Pre-built binaries are now available from the Mini vMac downloads page supporting Macintosh II with 256 colours.
The original post appears below for posterity.
As I posted some time ago, Mini vMac… »