Alejandro Jenkins

Theoretical physicist (AB Harvard '01; PhD Caltech '06). Prof. at U. of Costa Rica. Ulam Fellow at U. of Gdańsk, 2020-21. Keepin' it sciency.

[Alejandro Jenkins @escalanatural]

Out today on the Arxiv: my work with Robert Alicki and Gabriela Barenboim on the "Quantum thermodynamics of de Sitter space". This longer paper is accompanied by another shorter paper on the consequences for cosmology. 1/2 https://t.co/nb1iYdKWk4

[Alejandro Jenkins @escalanatural]

“He felt himself at last beginning to be a teacher, which is simply a man to whom his book is true, to whom is given a dignity of art that has little to do with his foolishness or weakness or inadequacy as a man.” -John Williams, _Stoner_ (1965)

[Alejandro Jenkins @escalanatural]

„Nur durch eine fortgehende immer wiederholte Unterbrechung ist Leben möglich.“ -Schlegel

[Alejandro Jenkins @escalanatural]

@Riazi_Cafe_en It's f(x) = x * sin(1/x). If you also specify that f(0) = 0, you have a continuous function whose plot cannot be drawn without lifting the pencil. It was a great favorite of mine in middle school in the early 1990s, after I got my first graphing calculator.😃

[Alejandro Jenkins @escalanatural]

Ben Franklin's bells #electrostatics ⚡ 🇺🇸 🦅 🎆https://t.co/or66GcwGb7 via @YouTube

[Alejandro Jenkins @escalanatural]

Valveless pulsejet engine demo https://t.co/4Eoaxtk2Rn via @YouTube

[Alejandro Jenkins @escalanatural]

This is a nice practical illustration of Bertrand's theorem in classical mechanics https://t.co/KYEJG3WfZR via @YouTube

[Alejandro Jenkins @escalanatural]

If you look closely, you can compute the thrust from the reading of the weighing scale. #PulseJet https://t.co/x2MxGcGKFZ via @YouTube

[Alejandro Jenkins @escalanatural]

My art history research came up this morning at the Royal Society...

[Alejandro Jenkins @escalanatural]

"I sing not, siren-like, to tempt; for I / Am harsh". - Donne

[Alejandro Jenkins @escalanatural]

The curator of collections at Trinity, Pola Durajska, will argue the same at a conference on "Scientific portraits and portraits for science" at the Royal Society on 20 March. https://t.co/WRGDp9nhlF

[Alejandro Jenkins @escalanatural]

In this preprint I argue that there's a portrait of a young Isaac Newton hiding in plain sight in the collection of Trinity College, Cambridge. #IsaacNewton #Historyofart https://t.co/aLur2V0w4T

[ShinyMcShine: Simpsons Quotes @ShinyMcShine_]

"Can we get rid of this ayatollah T-shirt? Khomeini died years ago."

"But, Marge, it works on any ayatollah-- Ayatollah Nakhbadeh, Ayatollah Zahedi. As we speak, Ayatollah Razmara and his cadre of fanatics are consolidating their power."

"I don't care who's consolidating their power."

[Alejandro Jenkins @escalanatural]

Newton's bucket experiment: I'm hoping to turn this into a science toy to rival 'Newton's cradle'. 😃 https://t.co/VGBB3jTQEM via @YouTube

[Alejandro Jenkins @escalanatural]

The simplest valveless pulse-jet engine: A Mason jar with a hole in the lid, with a bit of pure methanol at the bottom as fuel, and immersed in a bath of ice water to keep the heat from causing the jar to break apart. #JetPropulsion #ThermoAcoustic #SelfOscillation

[Alejandro Jenkins @escalanatural]

Richard Trevithick en Costa Rica https://t.co/CTRefHKl24 via @YouTube

[Alejandro Jenkins @escalanatural]

I still think of Carlos as a kid who'd aced my thermodynamics course and who'd stop by my office to talk about how the wind raises waves on the sea and the maintenance of the Chandler wobble. He's now a professor at Stanford. 🧐

[The Postdoctoral @thepostdoctoral]

Hard questions, soft materials | Stanford Doerr School of Sustainability - Carlos Diaz-Marin is assistant professor of energy science and engineering in the Stanford Doerr School of Sustainability. My research interests ... - https://t.co/xcYfSaPWpi

[Alejandro Jenkins @escalanatural]

Thermal self-oscillation! My favorite physical effect. 😄🥶🥵 @chen48721 https://t.co/VUrpkQZ3Ir

[Alejandro Jenkins @escalanatural]

During World War II, my grandfather single-handedly brought down ten German airplanes. After that the Luftwaffe got rid of him as a mechanic, due to his incompetence.

[Alejandro Jenkins @escalanatural]

Today's 'orthodox' Newtonmas (i.e., Isaac Newton's birthday in the Gregorian calendar). So here are some pictures of Newton's monument in the Trinity College chapel. Note how the sculptor worked to give the marble the visual texture of a wrinkled satin gown. #IsaacNewton

[Alejandro Jenkins @escalanatural]

A thermodynamic cycle for the X-ray corona in a black-hole binary system. Source: https://t.co/sg4aItsrYf