Annus Mirabilis papers Updated 2025-07-16
Anti-cancer mechanism Updated 2025-07-16
Antipodal point Updated 2025-07-16
Antoine de Saint-Exupéry Updated 2025-07-16
Ising model Updated 2025-07-16
Toy model of matter that exhibits phase transition in dimension 2 and greater. It does not provide numerically exact results by itself, but can serve as a tool to theorize existing and new phase transitions.
As mentioned at: stanford.edu/~jeffjar/statmech/intro4.html some systems which can be seen as modelled by it include:
- the spins direction (up or down) of atoms in a magnet, which can undergo phase transitions depending on temperature as that characterized by the Curie temperature and an externally applied magnetic fieldNeighboring spins like to align, which lowers the total system energy.
- the type of atom at a lattice point in a 2-metal alloy, e.g. Fe-C (e.g. steel). TODO: intuition for the neighbor interaction? What likes to be with what? And aren't different phases in different crystal structures?
Also has some funky relations to renormalization TODO.
Bibliography:
The Ising Model in Python by Mr. P Solver
. Source. The dude is crushing it on a Jupyter Notebook. Islamic sect Updated 2025-07-16
Isolation (database systems) Updated 2025-07-16
Determines what can or cannot happen when multiple queries are running in parallel.
See Section "SQL transaction isolation level" for the most common context under which this is discussed: SQL.
Isometry group Updated 2025-07-16
The group of all transformations that preserve some bilinear form, notable examples:
- orthogonal group preserves the inner product
- unitary group preserves a Hermitian form
- Lorentz group preserves the Minkowski inner product
Apostle not in the Twelve Updated 2025-07-16
Application of matrix multiplication Updated 2025-07-16
Application of the Maxwell-Boltzmann distribution Updated 2025-07-16
edisciplinas.usp.br/pluginfile.php/48089/course/section/16461/qsp_chapter7-boltzman.pdf mentions
- sedimentation
- reaction rate as it calculates how likely it is for particles to overcome the activation energy
Isomorphism Updated 2025-07-16
Something analogous to a group isomorphism, but that preserves whatever properties the given algebraic object has. E.g. for a field, we also have to preserve multiplication in addition to addition.
Other common examples include isomorphisms of vector spaces and field. But since both of those two are much simpler than groups in classification, as they are both determined by number of elements/dimension alone, see:
we tend to not talk about isomorphisms so much in those contexts.
Cancer is natural selection gone wrong Updated 2025-07-16
A cool thought about cancer expressed at Power, Sex, Suicide by Nick Lane (2006) is that cancer it is the direct product of natural selection gone wrong!
Cancer cells are obviously selected against anti-cancer mechanism, which when they manage to evade, they reproduce uncontrollably, gaining more and more momentum.
ISO SQL TRIGGER syntax Updated 2025-07-16
PostgreSQL requires you to define a SQL stored procedure: stackoverflow.com/questions/28149494/is-it-possible-to-create-trigger-without-execute-procedure-in-postgresql Their syntax may be standard compliant, not sure about the
EXECUTE part. Their docs: www.postgresql.org/docs/current/sql-createtrigger.htmlSQLite does not support SQL stored procedures at all, so maybe that's why they can't be standard compliant here: stackoverflow.com/questions/3335162/creating-stored-procedure-in-sqlite
SQL:1999 11.38 covers "Trigger definition". The Abstract syntax tree starts with the
CREATE TRIGGER and ends in:<triggered SQL statement> ::=
<SQL procedure statement>This is defined at 13.5 "SQL procedure statement", but that is humongous and I'm not sure what it is at all.
Application-specific integrated circuit Updated 2025-07-16
Isothermal DNA amplification techniques Updated 2025-07-16
Isothermal means "at fixed temperature".
This is to contrast with the more well established polymerase chain reaction, which requires heating and cooling the sample several times.
Italy Updated 2025-07-16
Arago spot Updated 2025-07-16
Cantor's diagonal argument Updated 2025-07-16
Ciro Santilli's hardware 2019-12 Bikehut bicycle repair stand Updated 2025-07-16
Maybe I'm an idiot and should have bought a much smaller rear wheel stand, only thought of that later, e.g.: www.amazon.co.uk/dp/B00G7ZO3GE or www.amazon.co.uk/dp/B00SD7NL44
Rope attached to rear rack + door knob: www.youtube.com/watch?v=teUsJt1WL1g
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