Decoding Solr and Lucene: Engineering Insights and Algorithms | October 06 2025, 17:11

Preparing a book for publication on Solr&Lucene. What do you think about publishing such a translation on Amazon? 🙂

The book is about algorithms and under-the-hood engineering. I haven’t seen books from this angle yet, maybe someone will find it interesting.

Privacy Pitfalls of Outlook Notifications During Screen Sharing on macOS | October 06 2025, 14:05

Microsoft has one very nasty thing with Outlook for MacOS, which for some reason nobody tries to fix. If you have a meeting in 30 minutes, Outlook reminds you with a popup showing the upcoming meetings, where it “highlights” these meetings. Well, in my case, there’s no secret here, I could even share my screen during that time. But it would be nice if such notifications didn’t appear while screen sharing, especially while recording, because screen sharing goes through Teams, which is part of the same package as Outlook.

But what’s worse is something else. If you try to CLOSE this notification window while screen sharing on MacOS (especially if the recording is on), it causes the whole Outlook with all the emails there to pop up. And there might be things there that the viewers shouldn’t see. That is, by _closing_ the window, you suddenly reveal the titles of email messages. Which is completely unexpected (well, until you step on these rakes, then it’s not unexpected anymore).

When Pigs Outsmart Technology: The Failure of Precision Feeding in Large Farms | October 05 2025, 17:01

Today I learned how scientific achievements fly under a pig’s tail when faced with reality.

There’s this thing called precision feeding in pig farming. The gist is: a pig has an RFID chip attached to its tag (actually to its ear), and when it wants to eat, it sticks the tag into the feeder – and a special sensor reads its data and dispenses exactly as much feed from the machine as it should, also recording in a database how much and when it was given. If the pig sticks its tag in too early, the feed machine won’t dispense any. The idea is to reduce feed costs, improve growth and health of the animals, and lessen environmental pollution (less uneaten feed).

It seems like a great idea. However, such a system doesn’t work where there are large populations – it only works in specialized productions with few pigs, where almost all are known by name.

Why doesn’t it work on a large scale?

Because pigs are very cunning and quickly adapt. One pig inserts a tag, and then the one higher in the hierarchy chases it away and eats what isn’t meant for it.

Whole classes of oppressed arise, whose role is to insert the tag so that the authorities can gorge themselves. In the end, chaos ensues and no precision is achieved.

This is how pigs oppose technological progress.

The Surprising Origins of the Word “Tumbler” for Drinking Glasses | October 05 2025, 15:32

In our language, glasses are called tumblers. I decided to find out why, because a tumbler is essentially an acrobat.

There are two mutually exclusive theories. According to one, the original tumbler glasses had a rounded or slightly convex bottom, which allowed them to “rock” or “tumble” (to tumble), but not tip over completely. So, a tumbler in this sense is kind of like a “weeble.” According to the other, they were specifically made so they could not be put down on the table open, because, say on a ship, they could tip over and the valuable rum would spill out.

Exploring the Chaos Game: Creating Fractals From Randomness | October 04 2025, 15:32

I read something interesting today. About fractals. If you take any three points that form a triangle, and then a fourth point anywhere, and subsequently throw a dice, the faces of which are assigned to the first three points. Next, you move from the current point towards the point corresponding to the result on the dice and place a new point halfway; this becomes the new current point. After many iterations, the points start to form the Sierpinski triangle – the one shown in the attached picture. Intuitively, you would think the triangle should be fully filled because it involves random movements in three directions from a randomly chosen point, but no. Moreover, it works even if the starting point is inside the future empty triangle (yes, a few points will disrupt the picture, but that’s it). If you start our experiment with five or six points instead of three, different shapes will form – see the attached picture. This graphical method is called the Chaos Game.

By the way, it may seem obvious, but in case you wondered — all the presented figures have zero area.

If you take two triangles and with a probability p move towards random vertices of the first, and with (1-p) towards random vertices of the second, you end up forming a Barnsley fern (picture №2).

I love such things because they seem like magic at first glance 🙂

(It’s a kind of problem from the same class as the synchronization of metronomes)

Celebrating Marcia Klioze at the Arts Club of Washington | October 03 2025, 22:42

Friends, I am currently at the opening of Marcia Klioze’s exhibit at the Arts Club Of Washington and I am absolutely thrilled! I am so happy for my wonderful mentor, from whom I have been learning oil painting for two and a half years. Today her solo exhibition is here, and the atmosphere is simply magical.

I am proud to be learning from her invaluable experience and learning to see the world anew. Next Tuesday is another class😉 I’ve wanted to post her works for a long time, and today I finally have the opportunity to share (I asked for permission, so it’s all official)!

Almost all works are for sale, for those who are interested, do drop by

Adjusting to Unexpected Checks: Virginia’s Surplus Distributions | October 03 2025, 00:22

I just can’t get used to the fact that when the state sends a $400 check just because they collected more from Virginians (everyone) than expected, it’s normal. They are the state of Virginia.

Understanding Jerusalem Syndrome and Its Global Counterparts | October 01 2025, 16:10

Listening to Sapolsky in the background, he mentioned Jerusalem Syndrome. It’s when a deeply religious American Baptist from the southern USA, having saved money and prepared, arrives in the Holy Land and sees that Jerusalem is just another city: traffic jams, smog, noise, pickpockets, McDonald’s—everything like that. And then—an interesting feature—in all cases, the person tears up sheets, takes off their clothes, and suddenly finds themselves on the streets of Jerusalem, dressed as if in a toga, begins to preach on the streets, calling for a simpler life and all that.

A psychiatric team arrives, takes the person to the hospital for a few days, everything becomes clear, they send him back home, and he never encounters this syndrome again.

Each year in Jerusalem, about up to many dozens of cases are recorded. It’s a recognized syndrome, about which scientific articles are published.

Sapolsky says that if hotels in Jerusalem always had, for example, checkered sheets instead of white ones, which seem to “invite” one to don a toga, it would help prevent the crisis.

But amusingly, there’s a twin brother of this disorder, the Paris Syndrome, which for some reason mainly affects the Japanese. Japanese tourists come to Paris because they are attracted by the culture, language, literature, and history of France, as well as the landmarks of Paris. However, once there, they encounter difficulties such as a language barrier (surprise surprise!), differences in mentality, and disappointment from the reality of Paris not meeting their expectations.

There’s also a milder version called the “Florentine Syndrome.” This often happens during a visit to one of the 50 museums in Florence, the cradle of the Renaissance. Suddenly, a visitor is overwhelmed by the depth of feeling the artist has imbued in the artwork. At this point, they acutely perceive all emotions, as if transported into the space of the image. Victims’ reactions vary up to hysteria or attempts to destroy the painting. Despite the syndrome’s relative rarity, guards in Florentine museums are specially trained on how to deal with its victims.

Overall, be careful with syndromes when you’re traveling.

PS. This image was made for me by google. In the second image, a guy in a tie tells a tearful girl 脆培, which seems just a meaningless set of characters, something like fragile culture. But when I asked ChatGPT, it told me it resembles 脱げ (nugu) — undress 🙂 if you ask Google Gemini to redo it, Google gives the same picture, where he’s also shouting 暁は, but at the same time, he has already taken off his shirt. But that’s also unclear what 暁 – it’s dawn. Generally, with Japanese, LLM is bad. I’ll leave the second image in the comments. By the way, there are several differences there, you can play a game to find ten differences. They are amusing

AI Microphone Chaos: Blending Office Sounds into Unexpected Poetry | October 01 2025, 15:44

Bought myself an AI microphone that listens to everything around and provides summaries. Decided to test it once. With it, you can’t even watch reels with the mic turned off on your computer, because it tries to merge and summarize everything it hears 😉

“..The team methodically moved through complex comparisons, but unexpected phrases like ‘Watch the video back if you didn’t notice’ and ‘Don’t be a sucker’ created a quiet, almost poetic dissonance—as if the universe whispered ‘Let it be’ amid spreadsheets and sprint tickets….”