Tag: Investigation

Near-Miss at Leningrad: The Unknown Predecessor to Chernobyl | April 26 2026, 17:32

On the anniversary of Chernobyl. Those interested in this topic may not know that a similar accident could have occurred ten years earlier on the main (very first RBMK-1000 unit) Leningrad Nuclear Power Plant.

There was a nearly identical situation: one turbine in operation, reactor shutdown by emergency protection, and subsequent power escalation.

Back then, the situation was saved by the Chief Reactor Operator Mikhail

Karrask, who, acting intuitively and relying on his experience with industrial reactors, introduced into the reactor in portions

12 manual control rods

BEFORE pressing the emergency shutdown button.

A couple of years ago, Karrask passed away. This story is almost unknown outside the industry. For proof, google his obituary on Rosatom.

The technical part. The main danger of the RBMK reactors at that time was in the design of the control rods. At the bottom, they were equipped with graphite “displacers”. When the emergency shutdown button was pressed, the rods began moving down, and in the first seconds, the graphite tips did not dampen the reactor, but on the contrary, displaced the water and increased the power in the lower part of the active zone. But precisely, the instructions in case of trouble suggested pressing the emergency shutdown button. If you followed the instructions, “Chernobyl” would have happened earlier.

After the incident at the Leningrad NPP, a commission was formed. Experts (including those from the Kurchatov Institute of Atomic Energy) pointed out the dangerous design flaws of the RBMK – the positive void coefficient of reactivity and incorrect design of the rods. Unfortunately, extensive changes to the design of all RBMK reactors were not made at that time. Only operational regulations recommendations were given, which, as history showed, were insufficient to prevent the tragedy in Chernobyl.

CPU vs GPU: A Speed Challenge in Embedding Creation | April 11 2026, 18:08

When working with certain tasks, the difference between a CPU and a GPU is simply astounding. For example, I need to create many (millions) of embeddings, model BGE M3. Running this on my quite powerful 24-core Intel Core Ultra 9 285K processor takes 45.85 seconds to create 500 embeddings, while using an NVIDIA 5090 GPU, the same task is completed in just 0.36 seconds. It is so fast that I specifically wrote this benchmark to figure out whether my GPU is being utilized at all. The program that sends requests to TEI does it in test mode not actively enough (roughly a couple of times per second), and the GPU load graphs are practically zero.

— Testing http://localhost:8080/embed — <– CPU version

Requests completed: 500

Total time: 45.85 sec

Throughput: 10.90 req/sec

Average latency (Avg Latency): 4386.11 ms

P95 latency: 5021.88 ms

— Testing http://localhost:8090/embed — <– GPU version (NVIDIA 5090)

Requests completed: 500

Total time: 0.36 sec

Throughput: 1398.69 req/sec

Average latency (Avg Latency): 31.38 ms

P95 latency: 53.18 ms

========================================

RESULT: http://localhost:8090/embed is 99.22% faster

When the Night Lit Up: Unraveling the Mystery of a Superbolt Storm | March 21 2026, 12:55

We had a thunderstorm last night. The whole county is buzzing because everyone thinks that something exploded just before midnight. Several posts in a row on social media. In short, it was thunder. But a bit more rare than usual. Caused by a 401 kA lightning, dubbed the Wild House Shaker. A typical lightning strike is 30 kA. If the numbers are to be believed, 401 kA is really damn a lot. They will likely say we haven’t had such lightning here for decades.

Attaching an interesting map.

The points on the map show superbolts — lightning strikes with an energy of no less than 1M J. Red points — particularly powerful superbolts with an energy of more than 2M J. That is, superbolts mostly occur in the northeastern part of the Atlantic and in the Mediterranean Sea, and less frequently — in the Andes, off the coast of Japan, and near South Africa.

this is what the page from which I took the map says (translation):

“New work shows that superbolts most often occur over the Mediterranean Sea, the northeastern Atlantic, and over the Andes, as well as in smaller amounts to the east of Japan, in tropical oceans, and near the southern tip of Africa. Unlike regular lightning, superbolts often strike over water.

“Ninety percent of lightning occurs over land,” said Holzworth (that’s the main guy on lightning at the University of Washington).

“But superbolts mostly arise over water, right up to the coastline. For example, in the northeastern Atlantic, the distribution maps of superbolts clearly show the outlines of the coasts of Spain and England.”

“The average energy of a discharge over water is higher than over land—that we knew,” he said. “But we did not expect such a stark difference.”

The season for superbolts also does not match the usual patterns of lightning. Regular lightning most often occurs in the summer—the three main so-called “lightning chimneys” coincide with summer thunderstorms over America, Africa south of the Sahara, and Southeast Asia. However, superbolts, which are more common in the Northern Hemisphere, occur in both hemispheres from November to February.

The reason for such a distribution remains a mystery. In some years, there are significantly more superbolts than in others: the end of 2013 was record-breaking, and the end of 2014 was the second largest, while in other years such events were much less frequent.

“We speculate that this may be related to sunspots or cosmic rays, but we will leave that for future research,” said Holzworth.

“For now, we are just demonstrating that there is a previously unknown pattern.”

Insights from a Visit to the Civil War Medical Museum | March 10 2026, 15:59

Today a big interesting historical post.

Where I was: Historical Museum of Military (Civil War) Medicine in Frederick, MD. Entry is $9, $15 with a guide. For an hour and a half, we got a very smart guy who gave an interesting lecture, making the provincial museum really very interesting. We even tipped the guy afterward.

A few interesting facts that I didn’t know before. During the Civil War in the USA (1861-1865), there was a monstrous scale of losses – over 600,000 people. One in every ten was mobilized for the war. That is, excluding women, children, and the disabled – yes, someone from almost every family fought.

Apparently, Americans were not very experienced in wars back then, and organizing large groups of people was based on the “fend for yourself” principle. From gastrointestinal diseases alone, nearly four times more people died than from wounds. Soldiers cooked everything themselves – there was no cook or porridge for the platoon. They split into micro-groups of a few people, pooled whatever they had, and fried it on a fire. For some reason they mainly fried, not boiled (which also contributed to diseases). Their main rations were salt pork and hard-tack — crackers as hard as a stone. Fried hard-tacks were called Skillygalee.

Remember, it was not like that in European wars. And all because there were many of them, and they quickly figured out how to make them more effective. Plus, there was also a civil war, poorly organized and spontaneous.

Initially, soldiers were handed money in the field and they sent it to their families as best they could (not all reached its destination). For Southerners, money devalued faster than they could carry it to the tent. Back then, each state issued its own money. They write about 8000 different banknotes at that time. I didn’t quite believe it, started researching, and it turned out that this is still a very conservative estimate. Yes, anyone (state, city, private bank, railway, factory, and even a pharmacy) could print their own paper money. Each bank issued banknotes of its own design for different denominations ($1, $2, $3, $5, etc.). In 1860, there were about 1600 private banks in the USA, and almost each issued its own range of notes. But in the end, greenbacks – federal money prevailed.

They also told us about Dorothea Dix, the head of army nurses for the Union. She introduced an interesting age standard for the nurses. No “young and beautiful.” Only women over 30 years of age, “plain-looking,” no jewelry, fashionable dresses, or crinolines – only strict brown or black dresses. At that time, the appearance of a woman in a male military camp was considered almost indecent. Dorothea wanted the soldiers to see in the nurses strict mothers or aunts, not objects of flirtation.

To join the army, a volunteer was required to have at least two teeth opposing each other. Why? A soldier needed to quickly bite off the tip of a paper cartridge to pour the powder into the barrel. No teeth — you’re useless in battle.

Back then, they shot with Minié balls – made of soft lead. It was huge caliber (thumb-sized) and when it hit the body, it didn’t just pass through, it “burst” and literally turned bone into fine crumble. Repairing such a bone was impossible, so amputation became the only way to save a person from gangrene. At least there was some form of anesthesia (chloroform/ether).

Before the Civil War in the USA, people were buried where they died. But the war generated a demand: affluent Northern families wanted to bring their sons’ bodies home. That’s when embalming flourished. Right behind the front line were tents of “embalming surgeons” who for a decent sum (about $50–$100 for an officer) extracted blood and injected chemicals (arsenic and zinc) into the body. Actually, the museum building included such a place. Lincoln’s body after his assassination was transported across the entire country on a train, and it looked “alive” thanks to this new technology, which became the best advertisement for the new industry.

Overall, Frederick is a very nice city, full of art and nonconformists 🙂 Like our Leesburg, but 20 times bigger.

P.S. It was interesting to study what drove people to go die. Of course, our guide said “patriotism”.

But if you google, it turns out not quite so. Of course, in 1861 no one knew that the war would last 4 years and take 600,000 lives.

Reason #1 – boredom. Life on a farm in the mid-19th century was incredibly monotonous. War seemed like the greatest adventure in life. Guys thought: “I’ll go, see the world, shoot, become a hero, and then return to harvest.”

Reason #2 – naivety. The first volunteers went to the front as if on a picnic. In the first major battle (Bull Run), civilians from Washington even came with picnic baskets to watch the “spectacle,” until they were swept away by the retreating crowd of bloodied soldiers.

Reason #3 – “honor.” In the 19th century, “honor” was not an empty word. If you were a healthy guy and didn’t go to the army, you became an outcast in your own town. It’s written that girls often refused to go out with those who didn’t wear a uniform.

Reason #4 – “regimental solidarity.” As I already said, regiments were formed from neighbors. Not going to war meant betraying your friends, brothers, and father. Shame before neighbors was stronger than the fear of death.

What did they fight for?

Here the goals of the North and South radically differed:

For the North, the main idea was “Integrity of the Union.” For them, the USA was a great experiment in democracy that could not be allowed to fail. The slogan “Save the Union” was more powerful than “Free the Slaves.” At first, not everyone was ready to die for abolition of slavery.

For the South (Confederacy), the main motivation was “Defending their homes.” Most Southern soldiers did not own slaves (slavery was too expensive a luxury for ordinary farmers). But they were convinced that the “Yankee northerners” were coming to seize their land, burn their homes, and impose their rules. They saw themselves as heirs of Washington, fighting against “tyrant” Lincoln.

Reason #5 – bounties

When initial enthusiasm faded (by 1863), pure calculation played its part. States and the federal government started paying huge “enlistment bounties.” A sum of $500–$1000 was equivalent to a few years’ earnings for a laborer. For a poor immigrant (Irish or German) just off the boat in New York, it was a chance to provide for a family or buy a farm after the war.

In 1862-63, both sides introduced the draft, as volunteers were running out. This exposed social injustice.

In the North, you could officially avoid the army by paying $300 (huge money for a poor man, but manageable for the middle class) or find a “substitute” (a person who would fight in your place for money).

In the South, there was the “Twenty Negro Law.” Owning 20 or more slaves exempted you from service, as you were “needed in the rear for production control.”

This caused fierce resentment among ordinary soldiers. The famous “Draft Riots” in New York (1863) were sparked precisely by this sense of injustice.

So there you have it 🙂

The Lasting Legacy of Heaven’s Gate: A Cult’s Continuing Online Presence | February 28 2026, 04:09

Remember the American cult that had 39 members simultaneously self-extinguish in a mansion near San Diego, believing that they would be picked up by aliens? Well, their website is still up and running. The earliest version of this site from 1999 is virtually indistinguishable from what’s on the site now. The only difference is the ® symbol, which was after the name of the cult in 1999, but not now.

I Googled what’s up with their trademark registration. Just recently, in 2020, the company “The Evolutionary Level Above Human Foundation” registered (or renewed) rights to this trademark. The category is indeed listed as Lace, Ribbons, Embroidery, Fancy Goods, but the name of the company leaves no doubt that they are thinking about aliens.

I Googled some more. Turns out, this foundation, The Evolutionary Level Above Human (TELAH), acts as the “guardian of the legacy of the group ‘Heaven’s Gate'”, and has sued Stephen Havel and other defendants for copyright and trademark infringements, accusing them of illegally distributing archival materials and selling themed merchandise. The last update shows the parties are obligated to hold a meeting by the end of March 2024 to try to negotiate confidentiality and authentication of evidence without further judicial intervention.

Specifically, the foundation consists of real people from Arizona, Mark and Sara King, and the organization is registered as a corporation. They respond to emails and send out books and cassettes if you transfer them money.

Other former members are trying to challenge their “right” to use cult materials, such as recordings on tapes in court.

In short, some kind of life goes on there.

That is, the next time you think of Flat Earthers as “some pranksters pretending to be weirdos”, remember these folks, maintaining their website and selling books by their “prophets”.

The Sole Excommunication of the 21st Century: The Case of Monk Nikolai Romanov | February 21 2026, 00:10

I wanted to find out who was excommunicated in the 21st century, and it turned out that there was only one person. That was Nikolai Romanov (schema-monk Sergius). He was the founder, builder, and spiritual father of the Sredneuralsk Women’s Monastery.

Do you know why? He asked the nuns and parishioners, “are you ready to die for Russia?” The investigation saw this as incitement to suicide. He also called the COVID-19 pandemic “non-existent,” cursed those who closed churches for quarantine, opposed vaccination and the “digital camp,” and called for civil disobedience to church and secular authorities.

In November 2021, he was sentenced to 3.5 years in a colony. Later, in 2023, his sentence was increased to 7 years on a second charge (of inciting hatred). In April 2021, court bailiffs completely evicted all residents of the monastery (nuns and laypeople) due to violations of fire safety requirements and urban planning regulations.

The Russian Orthodox Church could not say “he was not with us by that time,” so they simply excommunicated him.

Jet Trails as Weather Predictors: A Phenomenon of High Altitude Humidity | January 24 2026, 02:34

Walking with Yuki, I see across the sky a very distinct and narrow streak clearly (apparently, an airplane had passed by), and usually a contrail disappears quite quickly, but today it is unusually sharp and long.

I started to investigate and it turns out this is a reliable indicator of changing weather, specifically the arrival of snow or rain: as we are actually expecting a sudden knee-deep snowfall tomorrow. In short: the airplane trail acts as an indicator of humidity at high altitudes.

Here’s how it works:

For a contrail not to evaporate but to start “smearing”, the air at an altitude of 8–10 kilometers must be very humid (saturated with moisture). If the air is dry, the ice crystals from the engine quickly turn into invisible vapor (sublimate). If the air is moist, the crystals have nowhere to evaporate. Instead, they start attracting extra moisture from the surrounding environment and grow. High humidity at high altitudes is a sure sign of an approaching warm atmospheric front.

Arbitrage Adventures: A Glimpse into Venezuela’s Currency Chaos | January 04 2026, 17:10

I first looked at a map of Venezuela around 15 years ago when you could fly there from Russia for a couple hundred dollars. I studied the map but never used it (though perhaps I should have).

At that time, it was the era of wild currency arbitrage, where the difference between the official bolivar rate “from the TV” and the real price on the black market reached astronomical proportions.

The scheme was simply brilliant: within the country, all airlines were required to sell tickets for local currency at the government rate. If an international flight cost a thousand dollars, it was converted into bolivars at the “pretty” official rate. But if you came off the street with a stack of real dollars and exchanged them at a money changer, the sum in bolivars needed to purchase the same ticket cost just a real hundred dollars, and sometimes even fifty.

The real fun began when intermediaries or acquaintances within the country got involved. You could book a ticket online through a local office, pay for it in bolivars through someone in Caracas, and then simply give them cash dollars when meeting, or transfer to a foreign account. The savings were so absurd that people flew business class simply because it was cheaper than lunch at Miami airport.

But cheap tickets were just the tip of the iceberg, because there was also something known as “raspao”. The state gave every traveler the right to buy a couple of thousand dollars at the cheap official rate on a credit card for spending abroad. Eventually, people bought cheap tickets, flew to the nearest islands, cashed in their currency quota, and returned home virtually rich, having sold these dollars on the black market for many times more.

Of course, this bonanza could not last forever and very quickly ended with a loud crash. Airlines quickly realized that their accounts were filled with millions of worthless-bolivars, which the government flatly refused to exchange for real currency. Planes flew half-empty, although all seats were officially bought out for currency quotas, and the government’s debts to carriers grew to billions of dollars, after which global giants simply began to massively leave the market.

But it worked for a while. I don’t remember exactly, somewhere between 2011 and 2014.

How such a breakdown between the official and unofficial rates lasted so long is beyond comprehension. The government could not quickly abolish the official rate because it supported imports of food and medicine. As soon as they acknowledged the real dollar rate, prices in stores would have skyrocketed immediately (which later happened). Flight tickets merely became a “collateral hole” in the system that everyone used while it was possible.

The Mysterious Early Morning Explosion in Leesburg: Unanswered Questions and the Hunt for Clues | December 06 2025, 16:58

Two months ago, there was a loud bang at four in the morning in the neighboring village. Firefighters, police, and medics arrived but found nothing at the scene except for several open manhole covers and the smell of burning. No fire, no casualties, no consequences (besides the displaced covers). Yesterday I read that the local fire marshal has offered a $10,000 reward for information that helps find and arrest four suspects who had the audacity to look suspicious in that village shortly before the bang. No faces, only the colors of their shorts and t-shirts.