Dennis V. Perepelitsa 🇺🇦🇺🇲

Experimental nuclear physicist at @BrookhavenLab RHIC & @CERN LHC. Tenured prof @CUBoulder, now having fun with it. Prev @MIT @Columbia. Soviet émigré, Papa 🐻

[Dennis V. Perepelitsa 🇺🇦🇺🇲 @profdvp]

Folks, I'm pleased to be promoted to Associate Professor with Tenure at @CUBoulder, just days before my 36th birthday!

An immeasurable thank you to my colleague Jamie Nagle, and to our post-docs, grad students, and undergrads for taking a chance on a new junior faculty!

[Dennis V. Perepelitsa 🇺🇦🇺🇲 @profdvp]

Wish me luck mogging the neighborhood dads

[Dennis V. Perepelitsa 🇺🇦🇺🇲 @profdvp]

@andre_quentin Yeah it’s a very fragile peace (we have a 5 and a 0 year old). When it works, it just barely works. But when somebody is sick or whatever else, it can collapse very quickly. 😂

[Dennis V. Perepelitsa 🇺🇦🇺🇲 @profdvp]

When you are young and somebody tells you that marriage is the foundation for human civilization - it sounds goofy or grandiose. But for me, after nine years of marriage today, this has been an understatement.

Marriage is a commitment to a shared vision of the future. It is a mighty foundry, a laboratory, a busy and sprawling shipyard - from which you can build so much that has meaning and value. Happy anniversary to my wife. 🎃

[Dennis V. Perepelitsa 🇺🇦🇺🇲 @profdvp]

@rothkopfAK @SeoulNatlUni @SejongUniKR Looking forward to your local recommendations come March! 😁🇰🇷

[Dennis V. Perepelitsa 🇺🇦🇺🇲 @profdvp]

I unironically believe that Ukrainians will save the free world, and that my family's homeland in the Donbas is the rock against which the global forces of authoritarianism will shatter and exhaust themselves.

But I also wish it did not have to be them. A reminder that many heroes don't get to choose their moment.

[laugh&pain 🗿 @laugh_in_pain]

Чим далі тим більше переконаний, що ми своїм спротивом поламали глобальні плани про переформатуванню світового порядку.
Рашка повинна була захопити нас, деморалізувати захід, який би мовчки спостерігав, якби ми самі за себе не воювали
Потім по інерції Китай - Тайвань, КНДР - Південна Корея
А потім приходить Трамп, посилаючись на безлад у світі і необхідність посилення Америки як "гаранта світової демократії" робити те що ті дуани і почали робити, не розуміючи що для цього немає підстав. Тобто анексія Канади, Гренландія. В цей час Росія розширює або політично, гібридно або і воєнно експансію на Європу. І в результаті розділити світ на трьох.
Але все коту під хвіст, бо don't fuck with Ukraine

[Dennis V. Perepelitsa 🇺🇦🇺🇲 @profdvp]

My review of INCIDENTS AROUND THE HOUSE

[Dennis V. Perepelitsa 🇺🇦🇺🇲 @profdvp]

Seems bad

[The Nobel Prize @NobelPrize]

BREAKING NEWS
The Royal Swedish Academy of Sciences has decided to award the 2026 #NobelPrize in Physics to Francis Halzen “for decisive contributions to the IceCube Neutrino Observatory and the discovery of high-energy neutrinos of astrophysical origin.”

[Dennis V. Perepelitsa 🇺🇦🇺🇲 @profdvp]

@elanbechor @Noahpinion Any chance to separate into the imperial core (Moscow & St. Petersburg) vs. the rest?

[Dennis V. Perepelitsa 🇺🇦🇺🇲 @profdvp]

Working on it. 🛠️

[David Sawyer @davidsawyer1]

Pretty pathetic that Colorado can’t even muster one university in the top 50 despite being the state with the second most highly-educated population.

[Dennis V. Perepelitsa 🇺🇦🇺🇲 @profdvp]

A targeted strike on the National Academy of Sciences.

The Russian invaders will deface and ruin every blessing of civilization. They are willing to burn it all down if it means they can rule over the poisoned ashes. Vandals and murderers.

[Volodymyr Zelenskyy / Володимир Зеленський @ZelenskyyUa]

A Russian strike against the building of the National Academy of Sciences of Ukraine. A rescue operation is underway: crews are putting out the fire and searching for people who may have been trapped inside. All services are deployed. Today in Kyiv, a pharmaceutical company and gas stations were also attacked; in Dnipro, a business center; and in other cities and regions, civilian facilities, businesses, and communications infrastructure were targeted as well. Sadly, people have been killed… My condolences to their families and loved ones. Russia will definitely face a response to this. And every one of Ukraine’s partners must see from this terror, from these strikes, that supporting Ukraine means truly supporting people’s lives – supporting the principle that terror must never be normalized, anywhere. Russia must be held accountable for all of this and face real consequences. I thank everyone who helps Ukraine!

[Dennis V. Perepelitsa 🇺🇦🇺🇲 @profdvp]

My dog, whenever he hears the special word

[Dennis V. Perepelitsa 🇺🇦🇺🇲 @profdvp]

Folks, I’m getting very credible information from industry sources that ASI (All-night Sleeping Intelligence) is close to being achieved internally in the nursery.

We must reject all calls to pace the frontier — think of the parent-sleep-hours at stake!!!

[Dennis V. Perepelitsa 🇺🇦🇺🇲 @profdvp]

I was in high school when 9/11 happened.

In the weeks that followed, two facts became very clear to me: (1) Evil exists — not “blowback”, not “chickens coming home to roost”. Evil. (2) Open, liberal Western civilization has enemies who want very badly to pervert and dismember it.

And later, over a period of years: (3) there are people whose political philosophies prevent them processing (1) and (2).

[2001 Live @25YearsAgoLive]

Donna Spera, who has made it down from the South Tower’s 78th-floor Sky Lobby, describes the scene as a “gore floor.”

Over 200 people were gathered in the Sky Lobby when the second plane crashed into the South Tower, dousing almost everyone in jet fuel as the ceiling and walls caved in. The room is a “sea of dismembered limbs and heads.”

One other survivor describes seeing people burning alive, unable to move, begging for death, as he made his way downstairs.

Spera is covered in burns and is carried from the building.

[Dennis V. Perepelitsa 🇺🇦🇺🇲 @profdvp]

4 year old: 🎵 I’m bringing home a baby bumble bee / won’t my mama be so proud of me 🎵

me: aw what a nice song, I wonder how the rest of it goes

[Dennis V. Perepelitsa 🇺🇦🇺🇲 @profdvp]

Very funny to me how baby bottle design has essentially been Solved.

There is the end result of all technological innovation. We have found the deep global minimum and are now Done.

[Dennis V. Perepelitsa 🇺🇦🇺🇲 @profdvp]

Extremely interesting data here on possible trajectories in public higher education (where I'm tenured faculty).

The research flagship (UIUC) and the university located in the big dynamic city (UIC) prosper, and another 3-4 can muddle through. But the bottom half are all headed to zero.

The question is how much will this generalize (i.e. how strong are the IL-specific factors?)

[Ryan Burge 📊 @ryanburge]

There are a dozen public universities in the state of Illinois.

Just two of them have recorded any significant growth.

The University of Illinois, Urbana-Champaign (+41%)
The University of Illinois - Chicago (+37%)

8 of the 12 have recorded double digit enrollment losses.