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:

Institute for Computing and Information Sciences
Mercator 1, Toernooiveld 212, Nijmegen

Right after the Master's BBQ

RT @gretathunberg
Over 4 million on #ClimateStrike today. In 163 countries. And counting...
If you belong to the small number of people who feel threatened by us, then we we have some very bad news for you:
This is just the beginning. Change is coming - like it or not. #FridaysForFuture

DIR2019, the Dutch-Belgian Information Retrieval workshop 2019
Friday, November 29
Lloyd Hotel in Amsterdam, NL

Keynote by Dietmar Jannach (University of Klagenfurt)

The full program is yet to be announced; top ranked IR papers from SIGIR, ICTIR, TheWebConf, WSDM, CIKM, NeurIPS, RecSys, CHI, CHIIR, KDD, ECIR, ACL, EMNLP etc. with authors in NL & Be present their work in a lightning talk.

Registration is open:

“Decentralised Hashtag Search and Subscription in Federated Social Networks” – Schmittlauch

Declarative Amsterdam:
A symposium

When: October 4th 2019
Where: CWI - Turing room
Attendance: Free with registration

Declarative programming is a new approach to applications. Rather than describing exactly how to reach the solution, it describes what the solution should look like, and leaves more of the administrative parts of the program to the computer.

For registration:

Special issue on de-personalisation, diversification, filter bubbles and search


Bij herdenking Operatie Market Garden /75 jaar vrijheid

Turn off DoH, Firefox. Now.

I do not want all my traffic to be monitored by Cloud Flare, do you?

Go to about:config and set network.trr.mode to value 5

How do interval scales help us with better understanding IR evaluation measures?

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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.