I'm David Llewellyn-Jones and this is my homepage. I'm a software engineer at Jolla, who's also interested in programming, security, privacy and graphics. I occasionally crave adventure and a good thunderstorm. You might be interested in my software, my research or my random musings.

Want to know more about me? Here's a personality sketch written by a psychologist when I was in school.

“David is of high intelligence, although lacking in true creativity. He has a need for order and clarity, and for neat and tidy systems in which every detail finds its appropriate place. His writing is rather dull and mechanical, occasionally enlivened by somewhat corny puns and by flashes of imagination of the sci-fi type. He has a strong drive for competence. He seems to have little feel and little sympathy for other people and does not enjoy interacting with others. Self-centered, he nonetheless has a deep moral sense.”

Wow. Harsh. But disturbingly accurate.

This site was created using Flagellum. You can change the site style or disable the animation.

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15 Jan 2022 : Waste data dump #
It's my first waste data dump of 2022, which means a whole new set of graphs on my waste page. My average daily output from the start of the year is 220.33 g/day. That's rather high, but mostly because I had a couple of unusual items following on from Christmas (a broken and now-replaced electric toothbrush and a large cardboard advent calendar). Apart from that, there's not much to see in the graphs yet, but that will change over time.
6 Jan 2022 : Epiphany! #
It's the sixth of January already, time to remove the decorations. And while there's snow roundabout, all deep and crisp and even, here in Finland, the snow on my website has stopped falling today. Back to the drifting bokeh blobs.
23 Dec 2021 : We wish you a Merry Christmas... #
It's that festive time of year again, and so time to replace the usual decorations on this site with some snowy animations. Christmas eve is a holiday in Finland, so this evening is already feeling very relaxing, and I'm looking forward to a bit of a festive break. Merry Christmas!
23 Dec 2021 : Waste data dump #
This will likely be my last waste data dump of 2021. It wasn't a great week, essentially wrapping things up for the year means that my waste output was pretty much up across the board. My average for this last week was 203 g/day, which is even above my target. But hopefully it won't impact too much on the overall result. My next post on the matter will be my annual summary, so let's see how things look then.
6 Dec 2021 : Waste data dump #
My latest waste data is now online. There's been a gap of a month this time, because I spent half my time in the UK. As a result, my output is down to 80.93 g/day compared to my 2021 average of 120.14 g/day. That's deceptively low, although also pushed up as a result of me breaking a mug. So while compost, returnables, card and plastic were all predictably down, the rest were around my average. All predictable, given the circumstances.