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:


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.

A synthetic view of the Linux performance tools by Brendan Gregg.

Link below is for the SVG version so you can zoom in your browser :

#Linux #Performance #Monitoring

I was wrong. CRDTs are the future - Seph (former Google Wave dev):

Also on the topic of CRDTs: & ...
Local-first Software; You Own Your Data, In Spite of the Cloud - Ink & Switch:

Professor of Artificial Intelligence & Language, Speech and Communication

Employment: 0.8 - 1.0 FTE
Maximum gross monthly salary: € 8,371
Faculty of Arts
Required background: PhD
Duration of the contract: 5 years
Application deadline: 11 June 2021

Google AMP does not longer get preferred treatment from Google. That was about time!

For #Fediverse13, let me dig up my ancient blogposts on decentralized social media from time before #ActivityPub.

Oldest one would be this, where I mention Diaspora as "alpha": - just over 10 years ago!

And 9 years ago :birdsite: still had RSS feeds for each account:

Today on fedi you can get RSS feeds. Here's mine:

And here's the RSS feed of #Fediverse13 on m.s:

Does anyone know if iPad cameras can be harvested and connected to the Raspberry Pi?

I’m asking particularly about Gen 3 IPads.

Here is a pic for reference.

Show more

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.