anton repushko

инженер, шизоид, шуе

[dstack @dstackai]

Introducing Fleets: a new open-source tool to manage cloud and on-prem clusters for AI. No more Kubernetes, KubeFlow, Slurm, etc.

Fleets enable researchers and engineers to develop AI seamlessly, without friction with Ops teams. https://t.co/ZgrAKaOLGl

[ThePrimeagen @ThePrimeagen]

"It is practically impossible to teach good programming to students that have had a prior exposure to JavaScript: as potential programmers they are mentally mutilated beyond hope of regeneration." - Edsger Dijkstra

[anton repushko @repushko_ru]

@norpadon как же я заорал

[anton repushko @repushko_ru]

@jaltma Maybe that could be interesting

https://t.co/v1DyhZA22k

[Emmett Shear @eshear]

ceo any% 55:32 — new record???

[Минута в минуту @minutavminutu]

16-летняя 10-классница Марина Курышева выглядывает в окно и видит снайпера, засевшего на крыше соседнего дома. Он тоже видит Марину и стреляет.

В последний момент она пытается закрыться от выстрела рукой. Пуля пробивает и руку, и грудную клетку. Марина умирает от потери крови.

[Tom Ostafin | PIROFAUNA wishlist! @PetumsStudio]

New splashscreen for my game. #madewithunity

[Andrew Côté @Andercot]

First video of LK-99 Full Levitation, aka flux-pinning

This video was just posted to the Chinese video-sharing site BiliBili and claims to be a highly pure synthesized sample of LK-99.

What is the physical phenomenon behind this and what does it mean?

Levitation of superconducting materials is a phenomenon unique to what is called Type-II superconductors, and is an effect whereby magnetic field lines becomes 'trapped' as it passes through the material, providing the force needed to levitate. These are the popular images and videos of cryogenically-cooled discs floating above a magnet frequently seen online and in the pinned post on my profile.

You can think of this like strands of hair being caught in gum - the gum is suspended in mid-air by adhering strongly to the hair as the hair passes through it. The hair in this case is magnetic field lines and the gum is the Type-II superconductor. Just like hair comes in individual strands, or in other words hair is 'quantized' or 'discrete', so is the flux trapped at the 'pinning centers' quantized in what are called 'magnetic vortices' - the quantization of pinned flux lines is a key property and distinguishing characteristic of Type-II superconductors (although technically can occur in Type-I superconductors if the material thickness is smaller than the London penetration depth, which is indeed very small - specifics for the physics nerds out there).

Flux-pinning is entirely unique to superconductors and is also wholly distinct from the Meissner effect. It is not a property of diamagnets or diamagnetism.

At @TRIUMFLab I contributed to flux-pinning studies in Niobium crystal superconducting radio-frequency cavities used for particle acceleration. In that application, trapped flux poses an issue by increasing the remnant surface resistivity of the cavity, which has the effect of decreasing its effective quality factor or Q-factor, which is a measurement of a resonators efficiency. SRF cavities typically have Q-factors of 10E10 and trapped flux at pinning centers reduces the maximum effective accelerating electric field used to drive charged particle bunches close to the speed of light.

Flux pinning is thought to arise in some Type-II superconductors by small imperfections in the crystal, also called volume defects, that enable flux to penetrate the material. In SRF cavities an issue that arises is any magnetic field that is passing through the material, e.g. by the Earth's background field, can become pinned or trapped inside the cavity as it transitions into a superconducting state. See some attached plots in the comments from a study showing how the surface resistivity of SRF cavities increases the more there is a background field as the cavity transitions into superconducting state.

This is the first video I am aware of that claims to show the flux-pinned levitation of a LK-99 sample. If this is in fact what is happening, then it is a very unique and promising finding of this new materials properties and potential for future study.

If this is real then it is truly ground-breaking

[Everything Out Of Context @EverythingOOC]

The Simpsons can’t keep getting away with it 😭😭

[Benjamin Td @_benjamintd]

I'm turning Chronotrains into a trip planning tool. Think Google Flights, but for trains in Europe.

Because 🚆 are cooler than ✈️.

[anton repushko @repushko_ru]

@xmbshwll заводим в Воронеже уже регион (нет)

[Soren Iverson @soren_iverson]

Airbnb for toilets = Airbnp

[yurikrupenin.bsky.social @turbojedi]

После смерти Кормака Маккарти кто-то показывал его единственный опубликованный non-fiction piece; я добрался и рад сообщить, что он как начало Blood Meridian, только дрыном по голове получает не герой, а вы, уважаемый читатель.

https://t.co/9ABxMAEU2W

[anton repushko @repushko_ru]

@xmbshwll был там пару лет назад. Думаю, его поджог кто-то с клубникофобией

[The Insider @the_ins_ru]

В Курске с 2019-го года строят фитнес-центр, который к данному моменту приобрел форму... подводной лодки.

Предваряя комментарии — нет, это не ИА «Панорама».

[anton repushko @repushko_ru]

@vas3k @nikitonsky Ох уж эти рекомендации твиттера

[Denis Sharypin @denis_sharypin]

European country but the Internet is off on Sundays as well as shops

[anton repushko @repushko_ru]

@xmbshwll звучит по-менеджерски

[anton repushko @repushko_ru]

@xmbshwll ахуенно