Pinned toot is your home if you know:

\textit{idf} = - \log \frac{n_t}{N}

and... everyone else!

Pinned toot

Dear all,

For now, I will keep the site closed for registrations; but everyone can independently invite people to join using the following link to generate an invite:

If you know someone who wants to join this instance, then please do give them an invite!

Consider the instance open for those who know anyone on

"Sense of community" and an initial seed of some 40 IR researchers should be enough to keep those spammers out of here and still grow the club!

Pinned toot

Computer scientist 👨‍🏫 with main focus on Information Retrieval 📄

Also interested in Data Science / Big Data 💾

In the previous millennium :mastodon: a PhD on Multimedia Databases 🎥 (Yes that was a respectable research topic once upon a time pre-birdsite!)

is my academic home.

Entrepreneur: co-founder of ( admin.

Loves indie music: follow me at @arjenpdevries if you are interested in gigs, events, etc.

Pinned toot
Pinned toot

Inaugural toots on using a photo of lunch with Nick Belkin after attending the now Dr. Hugo Huurdeman defense.

See also:

@arjen Yup, the Internet Archive has the page going back to 2005!

These goals are very much what I want to see from the web, even if I don't think they're satisifed now:

"One of W3C's primary goals is to make these benefits available to all people, whatever their hardware, software, network infrastructure, native language, culture, geographical location, or physical or mental ability."


NEW! The Kiwix Pi4 hotspot kit! The pre-loaded SD card turns the Pi into a hotspot serving the entire contents of Wikipedia, Wiktionary and RPi StackExchange! Designed for people without online access - we think it's a pretty cool option for Preppers too!


To Infinity and Beyond! Accessibility is the Future for Kids' Search Engines. (arXiv:2106.07813v1 [cs.IR])

Promotion ongoing now also with the LED screen at the Vrijhof!

PhD position in Computational Social Science at MediaFutures @ University of Bergen, Norway (Deadline: 5th July 2021)

“If you dig it up and sell it and profit from it, you’re responsible for it.”

@Shell is the first oil company to be held individually liable. Who's next?

👀 @Total @exxonmobil @Chevron @bp_plc


The go-fed/activity library (, for #ActivityStreams and #ActivityPub in #golang , now has a v1.0.0 tagged release! Woo hoo!

The supporting website,, is still a work in progress, though the tutorial should be mostly accurate.

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The "unofficial" Information Retrieval Mastodon Instance.

Goal: Make a viable and valuable social space for anyone working in Information Retrieval and related scientific research.

Everyone welcome but expect some level of geekiness on the instance and federated timelines.