Category: facebook

Unveiling “Recommender Algorithms”: A Comprehensive Guide on Recommendation Systems | October 25 2025, 17:36

I finally released a book on #RecSys! It’s called Recommender Algorithms, where I’ve compiled over 50 recommendation algorithms with detailed mathematical derivations, thorough explanations, and code examples.

https://www.testmysearch.com/books/recommender-algorithms.html

It all started early this spring in Germany, when I attended an ACM conference and sketched out the first structure of the book while analyzing the talks from the RecSys track. And now, just six months later, it has come to life.

Why did I write it? Because neither online nor in print is there a single, accessible resource that deeply explores recommendation algorithms of various types and purposes. There are articles focused on small subsets, but collecting and systematizing approaches—from foundational methods to the very latest—seems to have never been done before. I don’t know if I succeeded, but I’d love to hear your feedback.

Please like & share!

P.S. Click at READ SAMPLE to see the first 40 pages. The table of contents is there as well.

https://www.testmysearch.com/books/recommender-algorithms.html

https://www.testmysearch.com/books/recommender-algorithms.html

Revisiting the Sun: A New Invention in Art? | October 19 2025, 18:15

Interestingly, depicting the sun in a painting is a very recent invention. I haven’t seen a single painting in any museum where the sun is depicted above the horizon. Well, maybe with the exception of the Impressionists, Monet’s is very symbolic. In modern works, it appears more often. But in half, it’s a trace from a photograph.

Update: Turns out Aivazovsky has a lot of this. But he produced so many paintings in the studio with his students that it seems you can find any combination of little ships, waves, and sun.

Life Imitates Art: The Real Louvre Heist After “Lupin” | October 19 2025, 14:49

Just yesterday we watched the first episode of the series “Lupin”, in which Assane Diop, inspired by the adventures of the fictional thief Arsène Lupin from Maurice Leblanc’s novels, together with two accomplices, carefully plans and steals a necklace that once belonged to Queen Marie-Antoinette from the Louvre. The episode was very cool, I hope the whole series is too.

And today I see in the news that today criminals stole jewels of “immeasurable worth” from the section where the French royal regalia are kept in the Louvre, and then fled the crime scene on scooters. The thieves entered the Apollo Gallery, where the French crown jewels are housed, using a ladder and, presumably, small chainsaws. Nine items were stolen from the collection of Napoleon’s and the Empresses’ (Josephine’s and Eugenie’s) jewels, including a necklace, a brooch, and a tiara. The entire theft took seven minutes. At least one of the stolen items was found near the museum. It appears the robbers dropped it during their escape.

What a coincidence

Chicago Airport’s Cannabis Amnesty Boxes: A Pre-Flight Solution | October 18 2025, 22:07

At Chicago Airport, there are these boxes for voluntary donations of marijuana to the police. And they are located AFTER the TSA screening line.

“These boxes belong to the Department of Aviation, but are serviced by the Chicago Police,” said police representative Maggie Huynh.

In general, they give passengers flying from Chicago the opportunity to dispose of marijuana before boarding the plane, as transporting it across state borders is illegal. Although marijuana remains illegal at the federal level, authorities claim they do not intend to arrest people found with it at Chicago airports. The TSA stated that if marijuana is found, they will refer the matter to the police. Chicago Police, while not recommending traveling with drugs (nicely said), states that they will not arrest a person if the amount they possess does not exceed the legal limit. They simply direct them to this box to voluntarily surrender what was found (what else to do with it, as carrying it on the plane is illegal by law)

So why use these specific boxes instead of, say, a regular trash bin? Because, as Huynh explained, only police have access to these boxes and can empty them — this helps prevent the marijuana or related products from falling into the “wrong hands.” And evidently, they must incinerate the waste somewhere…