Víkendové surfovanie

Včera vo veku 40 rokov na rakovinu zomrela Maryam Mirzakhani, matematička iránskeho pôvodu, jediná žena, ktorá dostala Fieldsovu medailu (keď sa dávali naposledy, v roku 2014). Mala českého manžela a malú dcéru.

To her dismay, Mirzakhani did poorly in her mathematics class that year. Her math teacher didn’t think she was particularly talented, which undermined her confidence. At that age, “it’s so important what others see in you,” Mirzakhani said. “I lost my interest in math.” The following year, Mirzakhani had a more encouraging teacher, however, and her performance improved enormously. “Starting from the second year, she was a star,” Beheshti said.

A Path Less Taken to the Peak of the Math World

When you teach, you do something useful. When you do research, most days you don’t.

That Huh would achieve this status after starting mathematics so late is almost as improbable as if he had picked up a tennis racket at 18 and won Wimbledon at 20. It’s the kind of out-of-nowhere journey that simply doesn’t happen in mathematics today, where it usually takes years of specialized training even to be in a position to make new discoveries. Yet it would be a mistake to see Huh’s breakthroughs as having come in spite of his unorthodox beginning. In many ways they’re a product of his unique history — a direct result of his chance encounter, in his last year of college, with a legendary mathematician who somehow recognized a gift in Huh that Huh had never perceived himself.

Teaching to fail – vďaka Ondrovi za linku

The most common errors in undergraduate mathematics – aj táto je dobrá a tiež Ondrova

You Don’t Need Blue Apron to Teach You to Turn On Your Oven

Whenever I write a recipe for a magazine or newspaper my editors demand more measurements and cooking times. This phony precision undermines the heart, and joy, of cooking. Chefs sample their dishes multiple times as they cook because cooking happens by taste and by eye, not by time and temperature. Baking is the fussy one where you need measurements, while cooking is for slobs like me.

Does that look like enough pasta? Does this taste as salty as you like? That sauce looks thin — let’s throw in some more tomatoes. People become dependent on cooking times and temperatures because they don’t understand how cooking works, they know only how to follow a recipe.

Datascapes – atlas for the end of the world; somewhat related: Summary of Solutions by Overall Rank

The tragedy of men

The biggest problem with masculinity, Perry proffers, is that it’s based on a model that’s several thousands of years old, when survival depended on physical strength and male power. Or, as he puts it, “masculinity is to chase things and fight things and to fuck. Everything else is a bit of a mismatch.” This framework for men has remained remarkably persistent even as society has evolved past it, with modern jobs and relationships requiring a very different set of skills. Feminism, Perry observes, is forward-thinking, wondering how women can change themselves and their lives for the better. But masculinity is regressive, always “harking back to some mythical golden age (for men), when men were ‘men.’” The easiest thing in the world to sell to men who feel disenfranchised from modern life, he says, is nostalgia—a promise that the world can change to fit them rather than the other way around. That men can be great again.

s kým trávime čas – trochu smutné grafy; zaujímavé by bolo pozrieť, či/ako sa slovenské podobajú na tie americké

meet Ruby and her friends

Snow leopard

About me: I’m the most beautiful, polite and well-mannered Snow leopard I know. I often have fights with the robots. (Which is kind of pointless, since we are similar in the end.) 
Birthday: June 8th
Interests: Solitude, Zen, and pirates
Pet peeve: People think I’m tough, but I’m really cuddly. 
Favorite expression: Think different
Secret superpower: Boundless beauty

Mladá osobnosť vedy Tomáš Bertók: Ľuďom chýba súdnosť a kritické myslenie

what bullets do to bodies

Early in my medical training, I learned that it is not the bullet that kills you, but the path the bullet takes. A non-expanding (or full-metal-jacket) bullet often enters the body in a straight line. Like a knife, it damages the organs and tissues directly in its path, and then it either exits the body or, if it is traveling at a slower velocity, is stopped by bone, tissue or skin.

This is in contrast to expanding bullets, especially if shot from an assault rifle, which can discharge bullets much faster than a handgun. Once they enter the body, they fragment and explode, pulverizing bones, tearing blood vessels and liquefying organs…

Two years ago, a group of doctors wrote in the Annals of Internal Medicine: “It does not matter whether we believe that guns kill people or that people kill people with guns — the result is the same: a public health crisis.” In the war zone of the E.R., we don’t see partisanship or politics. We see the devastation that happens when our society normalizes tools of total bodily destruction.

este raz (dlhšie a ťažké čítanie)… a tu je to celé v dvoch vetách

She started talking about the 2012 murder of 20 schoolchildren and six adults at Sandy Hook Elementary School. Goldberg said that if people had been shown the autopsy photos of the kids, the gun debate would have been transformed. “The fact that not a single one of those kids was able to be transported to a hospital, tells me that they were not just dead, but really really really really dead.

akčné fotky a fotky spod mikroskopu

Sezamko v Rajeckej Lesnej

V zime bol Sezamko u nás na fakulte, teraz sme sa vybrali na víkendovku do Rajeckej Lesnej. Až na prehánkové počasie to bola paráda. Počítali sme príklady:

Rozmýšľali na prednáškach:


Túlali sa po lese:

Mokli v daždi:


Užívali si slniečko:

Bývali v chatkách:

Stretli rozprávkové bytosti (hádajte, kto som):

A bolo nám veľmi fajn:

Takže ak poznáte terajšie štvrtáčky, štvrtákov, piatakov a piatačky, tak im v septembri odporučte Sezamka, radi sa s nimi na podobnej akcii stretneme budúci rok. 

PS Krásne fotky nám opäť nafotil Martin Dubovský

Víkendové surfovanie

our mothers as we never saw them

The old photos of her are even more compelling than the stories because they’re a historical record, carrying the weight of fact, even if the truth there is slippery: the trick of an image, and so much left outside the frame. These photos serve as a visual accompaniment to the myths. Because any story about your mother is part myth, isn’t it?

Stephen Wolfram: A New Kind of Science (celá kniha, free)

Paul Lockhart: A Mathematician’s Lament 

In fact, if I had to design a mechanism for the express purpose of destroying a child’s natural curiosity and love of pattern-making, I couldn’t possibly do as good a job as is currently being done [by] contemporary mathematics education.

Neuralink (a venture to merge human brain with AI) and The Boring Company – Elon má nejako veľa voľného času…

Seeing theory – výborné, budem ukazovať budúci školský rok prvákom a prváčkam

British food, explained (sorta)

Unless it’s a pie that is a pudding, like a mince pie, which doesn’t involve mince, which is meat that’s been minced, but does involve mincemeat, which doesn’t involve meat. You could put what you think of as pudding on this type of pie, which is a pudding.

slovenské nemocnice nie sú Baby-Friendly (už ani formálne)

Study: Accomplished female scientists often overlooked

One, the composition of the organizing committee matters. I looked at all the neuroimmunology conferences held in 2016 worldwide, and I found that as you approach 50 percent women on the organizing committee, you approach 50 percent female invited speakers. So if you want gender parity in speakers, first you need to include more women in organizing and planning committees. Two, speaking out about gender balance makes a difference.

lyrebird – vytvoria imitáciu vášho hlasu z jednominútovej nahrávky

jahňatá narodené s použitím umelých materníc – fascinujúce, strašidelné, úžasné

kto sponzoruje (slovenské) konferencie pediatrov? Kto by mal? A kto by nemal?

Dievčatá sa o vedu a technológie začínajú zaujímať neskôr, ich záujem prudko klesá

Víkendové surfovanie

What It’s Like to Be Rihanna’s Personal Chef

So here’s a little story

Anyway I was getting sick of his shit when I noticed something. Thanks to our shared inbox, I’d been signing all communications as “Nicole”

‘London Bridge is down’: the secret plan for the days after the Queen’s death

“The King’s life is moving peacefully towards its close,” was the final notice issued by George V’s doctor, Lord Dawson, at 9.30pm on the night of 20 January 1936. Not long afterwards, Dawson injected the king with 750mg of morphine and a gram of cocaine – enough to kill him twice over – in order to ease the monarch’s suffering, and to have him expire in time for the printing presses of the Times, which rolled at midnight.

…three of the Queen’s last four prime ministers were born after she came to the throne.

nové nórske bankovky majú zaujímavé druhé strany (celé sú s morskou tematikou)

Why STEM Majors Need the Humanities

The common element in all of this is knowing how to tell a story. Contrary to popular misconceptions about science and technology, a good piece of technical work is not a disembodied sequence of formulas and calculations, but rather is part of a narrative that has a long plot line and a large cast of characters.

picturing math – výstava v Met; ak ste v New Yorku, choďte. Pre nás, ktorí to teraz máme ďaleko, sú niektoré obrázky a komentáre tu

11:57:30 – the doomsday clock

There have been moves from five to six minutes before, to which this is proportional.  Also, the clock was at 11:57; it’s only been at 11:58 once before, after the US and Soviet Union did thermonuclear tests in close temporal proximity in 1953.  So unless they want to say it is literally the worst it has ever been, two and a half minutes to midnight it is.


December bol rýchly, nabitý a zaujímavý.

Jednu sobotu sme strávili s Kikou, Kubom a deťmi, ktoré riešia korešpondenčný seminár Sezamko, na fakulte. Počítali sa príklady, hrali matematické hry, riešili zaujímavé problémy na prednáškach.

Tie krásne čiernobiele fotky nafotil Martin Dubovský, otec jedného účastníka.

Víkendové surfovanie

The Math Revolution (vďaka Ondrovi za linku)

The new outside-of-school math programs like the Russian School vary in their curricula and teaching methods, but they have key elements in common. Perhaps the most salient is the emphasis on teaching students to think about math conceptually and then use that conceptual knowledge as a tool to predict, explore, and explain the world around them. There is a dearth of rote learning and not much time spent applying a list of memorized formulas. Computational speed is not a virtue.

eduScrum (a ešte raz) – Mišo teraz kvôli novej práci študuje všetko možné o Scrum-e, stand-up meetingoch, … a ako to už chodí, podobné veci majú tendenciu sa zjavovať z rôznych smerov, a u nás na fakulte začali chodiť linky na eduScrum

učiteľ už nie je len postavička stojaca pred tabuľou a prednášajúca učivo apatickým deťom hrajúcim sa na mobiloch. Trieda je rozdelená do skupín a žiaci sa učia spoločne. Študujú novú teóriu, robia cvičenia, sú nútení spolupracovať a samostatne riešiť problémy. Dokonca si sami určujú, čo budú robiť na hodine a čo im ostane na domácu úlohu.

Chimamanda Ngozi Adichie: The danger of a single story – to je tá istá, ktorá rozprávala We should all be feminists (vďaka Zuzine za tip)

ako zarobiť na rodičoch

ako spraviť dieťaťu radosť

the scale of the universe

the life and death probability simulator

CRISPR’s Most Exciting Uses Have Nothing to Do With Gene-Editing

Now, instead of a precise and versatile set of scissors, which can cut any gene you want, you have a precise and versatile delivery system, which can control any gene you want. You don’t just have an editor. You have a stimulant, a muzzle, a dimmer switch, a tracker.

MiST 2016

Kým sa moje mláďatá potulovali pri vodopádoch, ja som bola pod Kľakom (a na Kľaku) na malej veľmi príjemnej konferencii Mathematics in Science and Technologies.

Bolo veľmi dobre a zaujímavo a dúfam, že aj na budúci rok sa nám podarí ju zorganizovať. Ak ste alebo poznáte nejakých doktorandov a doktorandky, ktorí robia niečo s matematikou, povedzte im nech nám o tom prídu začiatkom budúceho roku porozprávať. Tí tohtoroční odchádzali veľmi spokojní a s kopou nových nápadov.

Ako lákadlo ešte aj tohtoročné pozvané prednášky:
Hynek Bachratý (FRI UNIZA): Púpavy na Marse
Jan Foniok (Manchester Metropolitan University): Turingovy stroje a problém za milion dolarů
Michal Forišek (KI FMFI UK): Item Response Theory: ako lepšie hodnotiť, čo je ťažšie a kto je šikovnejší
Katarína Pišútová (UK): Dištančné vzdelávanie
Jozef Hanč (PF UPJŠ Košice): Kvantitatívna gramotnosť, jej atribúty a rozvoj
Peter Jacko (Lancaster University): Problems and solutions in the management of queueing systems
Frantisek Kardoš (Université Bordeaux): Hamiltonovské kružnice v planárnych kubických grafoch
Martin Mojžiš (KTFDF FMFI UK): Nakoľko rozumieme Mendelejevovej tabuľke?
Peter Tarábek (FRI UNIZA): Ako sa so študentmi hráme (Starcraft)
Margita Vajsáblová (KMaD SF STU): Aspekty tvorby kartografického zobrazenia
Sofia Villar (Cambridge Institute of Public Health): The statistics and optimisation behind the development of new medications and therapies

ps Konferencia je baby-friendly a medzi prednáškami sa dá lyžovať a hrať hokej.

Víkendové surfovanie

How Doctors Take Women’s Pain Less Seriously

“Female pain might be perceived as constructed or exaggerated”: We saw this from the moment we entered the hospital, as the staff downplayed Rachel’s pain, even plain ignored it. In her essay, Jamison refers back to “The Girl Who Cried Pain,” a study identifying ways gender bias tends to play out in clinical pain management. Women are  “more likely to be treated less aggressively in their initial encounters with the health-care system until they ‘prove that they are as sick as male patients,’” the study concludes—a phenomenon referred to in the medical community as “Yentl Syndrome.”

What It’s Like Living in the Coldest Town on Earth

The Importance of Recreational Math

In 1975, a San Diego woman named Marjorie Rice read in her son’s Scientific American magazine that there were only eight known pentagonal shapes that could entirely tile, or tessellate, a plane. Despite having had no math beyond high school, she resolved to find another. By 1977, she’d discovered not just one but four new tessellations — a result noteworthy enough to be published the following year in a mathematics journal.

How fast do living organisms move: Maximum speeds from bacteria to elephants and whales


…the maximum speed has rarely attracted the interest of physicists, despite its remarkable scaling property; it is roughly proportional to length throughout nearly the whole range of running and swimming organisms. We propose a simple order-of-magnitude interpretation of this ubiquitous relationship, based on physical properties shared by life forms of very different body structure and varying by more than 20 orders of magnitude in body mass.

dobrá fotka z ISS – vysvietené Times Square… a zaujímavé, ako viac svieti Hoboken (tam sme pár rokov bývali) oproti ostatným mestečkám v New Jersey

Head to head (Nájdu sa aj ženské alebo zmiešané dvojice?)

Turner and Constable are not alone in the pantheon of epic rivalries between creative giants. Isaac Newton and Gottfried Leibniz, two of the most brilliant mathematicians and thinkers of the 17th century, laid claim to the development of calculus, the mathematical study of change. Thomas Edison and Nikola Tesla both invented electrical systems in the 1880s. Steve Jobs and Bill Gates went head-to-head as pioneers of the computer age. If you Google almost any famous figure along with ‘rivalry’, you’ll find some interesting results.

London Police ‘Super Recognizer’ Walks Beat With a Facebook of the Mind

Friends call Constable Collins Rain Man or Yoda or simply The Oracle. But to Scotland Yard, London’s metropolitan police force, he is known as a “super recognizer.” He has a special gift of facial recall powers that enables him to match even low-quality and partial imagery to a face he has seen before, on the street or in a database and possibly years earlier. The last time he had come face to face with Mr. Prince was during a fleeting encounter in 2005.

Marťan alebo streetfighting physics

Pri príležitosti včerajšieho sviatku som si prečítala knihu The Martian (napísal Andy Weir). Dobré, rýchle, miestami vtipné čítanie o astronautovi, ktorého omylom nechali na Marse.

I’ve been thinking about laws on Mars. Yeah, I know, it’s a stupid thing to think about, but I have a lot of free time.

There’s an international treaty saying no country can lay claim to anything that’s not on Earth. And by another treaty, if you’re not in any country’s territory, maritime law applies. So Mars is “international waters.” NASA is an American non-military organization, and it owns the Hab. So while I’m in the Hab, American law applies. As soon as I step outside, I’m in international waters. Then when I get in the Rover, I’m back to American law.

Here’s the cool part: I will eventually go to Schiaparelli crater and commandeer the Ares 4 lander. Nobody explicitly gave me permission to do this, and they can’t until I’m aboard Ares 4 and operating the comm system. After I board Ares 4, before talking to NASA, I will take control of a craft in international waters without permission. That makes me a pirate! A Space Pirate!

Onedlho bude aj film:

Čo na tej knihe bolo najviac cool, bola všetka tá improvizácia, ktorú Mark musel robiť. Veľmi mi to pripomínalo jednu matematickú prednášku, ktorú som videla, inšpirovanú touto prácou: Street-fighting mathematics, The Art of Educated Guessing and Opportunistic Problem Solving.

In problem solving, as in street fighting, rules are for fools: do whatever works—don’t just stand there! Yet we often fear an unjustified leap even though it may land us on a correct result. Traditional mathematics teaching is largely about solving exactly stated problems exactly, yet life often hands us partly defined problems needing only moderately accurate solutions. This engaging book is an antidote to the rigor mortis brought on by too much mathematical rigor, teaching us how to guess answers without needing a proof or an exact calculation.

Ako ste Deň neprečítaných kníh oslavovali vy?


the really big one

Compressional waves are fast-moving, high-frequency waves, audible to dogs and certain other animals but experienced by humans only as a sudden jolt. They are not very harmful, but they are potentially very useful, since they travel fast enough to be detected by sensors thirty to ninety seconds ahead of other seismic waves. That is enough time for earthquake early-warning systems, such as those in use throughout Japan, to automatically perform a variety of lifesaving functions: shutting down railways and power plants, opening elevators and firehouse doors, alerting hospitals to halt surgeries, and triggering alarms so that the general public can take cover. The Pacific Northwest has no early-warning system. When the Cascadia earthquake begins, there will be, instead, a cacophony of barking dogs and a long, suspended, what-was-that moment before the surface waves arrive.

Misty Copeland – opäť raz jedna žena, ktorej povedali, že jej telo nevyzerá tak, “ako by malo vyzerať”

myslíte si, že viete, ako funguje bicykel?

básnička o Fibonacciho postupnosti

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