tatzelbrumm @tatzelbrumm@qoto.org

@freemo @Science
I only used the "DeOldify" feature in MyHeritage to re-colorize a photograph of my farewell party when I (temporarily?) bailed from Trumpland in late 2017.
From left to right: Jason Antic, me, Lyndi Antic, Emily Burke.

Only as I read fashion magazines reporting what Amanda Gorman et al. wore at the inauguration, e.g.,
https://www.thecut.com/2021/01/amanda-gorman-inauguration-poem-prada.html
and
https://www.cosmopolitan.com/uk/fashion/style/a35275340/amanda-gorman-red-prada-headband/
I fully understand and appreciate the absolute brilliance of Bernie Sanders's fashion statement.
No wonder it went viral.

Infinite Diversity in Infinite Combinations
https://youtu.be/9_8nY_LQL3w

"Ihr aber lernet, wie man sieht, statt stiert
Und handelt, statt zu reden noch und noch.
So was hätt' einmal fast die Welt regiert!
Die Völker wurden seiner Herr, jedoch
Dass keiner uns zu früh da triumphiert –
Der Schoß ist fruchtbar noch, aus dem das kroch."

A truly impressive statement by Conan the Austrian.
https://youtu.be/mz3zFsTp2Pk

https://youtu.be/fEj1h7BC2b4
#contextfree

A necessary defeat for a judicial system whose integrity is characterized by Michael Conahan and Mark Ciavarella.
https://www.zeit.de/gesellschaft/zeitgeschehen/2021-01/julian-assange-soll-nicht-an-die-usa-ausgeliefert-werden
https://www.theguardian.com/media/2021/jan/04/julian-assange-cannot-be-extradited-to-us-british-judge-rules

Instead of "been there, done that, got the t-shirt" at #37c3,
"stay at home, got the t-shirt, doing what I'm best at" #rC3
— auch wenn andere vielleicht mal wieder nur Bahnhof verstehen.
#trollpolitik

is missing live #37C3 and recreating https://eisenbahnerwelt.de.tl/Museumsfahrzeuge-von-Leipzig.htm in 1:87 scale at home.
#rC3

... and I learn about https://youtu.be/gwK10jkI2K0 mere hours before the beginning of #rC3
^%$#@!

is shamelessly culturally misappropriating the rainbow flag from the LGBTQIA&^%$#@ community. https://www.flickr.com/photos/89067995@N00/albums/72157717358175956

@freemo
Looks like you're concerned about your or my image,
while I'm concerned about the defining properties of a resonator,
namely, that a resonator stores energy in two different forms, and converts this energy from one form to the other TWICE per oscillation cycle, as described by a second-order differential equation.

I don't care what you think.
Physics is NOT a Social Construct!!!

By the way, RF engineers' use of decibels, with 10dB corresponding to a factor of about three, confused the hell out of me until I understood that the important quantity that matters in information transmission is energy (or its disorganized form, entropy), not amplitude.

Turns out that textbooks are extremely bad at conveying first physical principles, but
Chetvorno - Own work, CC0, https://commons.wikimedia.org/w/index.php?curid=27408348
did a surprisingly good job, see picture.
@Science

@freemo
So I suggested that you read a textbook on Theoretical MECHANICS,
because I'm all too aware of the blind spots of electical engineers without a first physical principles perspective.

I'm not being pompous here, I'm just right. That's a subtle difference not immediately apparent to most.
@Science

@freemo
In case it matters, I have a Diplom in physics
AND a PhD in Electrical Engineering,
without ever having attended a regular EE program in college.

@Science

@freemo
Which part of "Shut up and calculate!" [https://events.cornell.edu/event/three_cheers_for_shut_up_and_calculate_in_fundamental_physics]
did you not understand?
@Science

@freemo
You asked me, a physicist, and as such, I'm giving you the universal definition that does not depend on what other people think.
A crystal oscillator has a lot of energy stored in mechanical vibrations, even though the coupling of that energy to the electric circuit, via the piezoelectric effect, is weak.
As for "twice the resonant frequency":
Shut up and calculate!
(specifically, the energies in the electric field of a capacitor and the magnetic energy as functions of time in an inductor of an undamped LC tank circuit in resonance).
You may then proceed to grab a textbook in Theoretical Mechanics and do all the exercises about pits and pendulums, and the periodic transfer of kinetic to potential energy and back.
@Science

@freemo @Science
That's just the outside view of a resonator. An actual resonator moves energy back and forth between the reactances at twice the resonant frequency. A pure resistance only dissipates energy, but doesn't store any.

I'd say matched, but not resonant. You need to have two non-vanishing (usually frequency dependent) complex reactances to cancel each other out.
I lack the imagination to consider a strictly real resistance "resonant".
@freemo @Science

Public servants like Gabriel Sterling may yet save the Republic
and make sure that government of the people, by the people, for the people, shall not perish from Georgia and the United States of America.