GIMP 3.0 plug-in for exporting JBIG2-encoded PDF files

JBIG2 is an efficient image compression format for bi-level (bi-tonal) images, which is supported by the PDF file format and common PDF viewers, but which lacks widely available tooling for its generation. GIMP is an open-source image editing suite, which has the capacity to output… »

Australian English communication growth charts

Below are presented expressive vocabulary ‘growth charts’ and limit ages, for an Australian English cohort, based on the norming samples for the long-form Australian English Communicative Development Inventory (OZI),^1,2 and its short form (OZI-SF).^3,4

Neonatal jaundice treatment thresholds calculator (NICE guidelines)

I present a free open source webapp for calculating neonatal jaundice treatment thresholds (bilirubin ‘nomograms’) based on UK National Institute for Health and Care Excellence (NICE) guidelines. The calculator can be accessed at https://yingtongli.me/bili/.

Please note that the calculator is based on the 2010… »

End of the line for Virtual Metro

Today I am regrettably discontinuing Virtual Metro. I launched this fun little project in 2019 and, according to server logs, it appears to have enjoyed modest success since then. Unfortunately, it has been down since at least March this year and perhaps earlier, and… »

Investigating a proprietary early-2000s abandonware ebook format

This article concerns a Windows software product which featured the ability to compile HTML websites and multimedia content into a standalone EXE file. The last release of this product was in 2003, and the product website has ceased to operate from 2012. Content was stored… »

Python re-implementation of Cryptomator encryption scheme

Cryptomator is an open-source file-based encryption system. Encrypted data is stored as files which can be easily uploaded to arbitrary cloud storage services, and there is a one-to-one relationship between plaintext and encrypted files. In order to increase privacy, filenames are encrypted and there is… »