Noël Carroll is an influential American philosopher and film scholar known for his work in aesthetics, philosophy of art, and film theory. He has written extensively about the nature of art, the emotional responses evoked by films, and the ways in which audiences interact with various forms of media. Carroll is particularly recognized for his contributions to the philosophical understanding of the horror genre, the narrative structures of films, and the concept of artistic experience.

"On Certainty" is a philosophical work by Ludwig Wittgenstein, composed in the latter part of his life and published posthumously in 1969. It consists of a series of remarks that explore the nature of certainty, belief, doubt, and the foundations of knowledge. The text responds to a variety of issues related to epistemology, particularly the question of how we can possess certain kinds of knowledge without needing further justification or evidence.

The Ocean Tracking Network (OTN) is a global initiative focused on studying and monitoring the movement and behavior of marine animals in the ocean. Established to enhance our understanding of marine ecosystems and the implications of human activities on these habitats, OTN employs a network of acoustic receivers and satellite tracking technologies to gather data on various marine species, including fish, sharks, and marine mammals.

Whichever problem you present a German, they will look for a mechanical solution to it!

The Kibble balance is so precise and reproducible that it was responsible for the 2019 redefinition of the Kilogram.

It relies rely on not one, but three macroscopic quantum mechanical effects:How cool is that! As usual, the advantage of those effects is that they are discrete, and have very fixed values that don't depend either:One downside of using some quantum mechanical effects is that you have to cool everything down to 5K. But that's OK, we've got liquid helium!

The operating principle is something along:Then, based on all this, you can determine how much the object weights.

Bibliography:

Uses the frequency of the hyperfine structure of caesium-133 ground state, i.e spin up vs spin down of its valence electron $6s^1$, to define the second.

International System of Units definition of the second since 1967, because this is what atomic clocks use.

TODO why does this have more energy than the hyperfine split of the hydrogen line given that it is further from the nucleus?

Why caesium hyperfine structure is used:

Currently an informal name for the Standard Model

Chronological outline of the key theories:

In the standard formulation of Maxwell's equations, the electric current is a convient but magic input.

Would it be possible to use Maxwell's equations to solve a system of pointlike particles such as electrons instead?

The following suggest no, or only for certain subcases less general than Maxwell's equations:This is the type of thing where the probability aspect of quantum mechanics seems it could "help".

After the 2019 redefinition of the SI base units it is by definition exactly $1.60217663410^{-19}$ Joules.

Alternative to the Lorentz gauge, but less used in general as it is not as nice for relativity invariance.