Molecule by Ciro Santilli 35 Updated +Created
Carl Zeiss SMT by Ciro Santilli 35 Updated +Created
Subsidiary of Carl Zeiss AG and also part owned by ASML, sole optics vendor of ASML as of 2020.
Focal length by Ciro Santilli 35 Updated +Created
If you pass parallel light.
For a biconvex spherical lens, it is given by:
where:
  • n: f nidnex
Electron configuration by Ciro Santilli 35 Updated +Created
Term symbol by Ciro Santilli 35 Updated +Created
This notation is so confusing! People often don't manage to explain the intuition behind it, why this is an useful notation. When you see Indian university entry exam level memorization classes about this, it makes you want to cry.
The key reason why term symbols matter are Hund's rules, which allow us to predict with some accuracy which electron configurations of those states has more energy than the other.
web.chem.ucsb.edu/~devries/chem218/Term%20symbols.pdf puts it well: electron configuration notation is not specific enough, as each such notation e.g. 1s2 2s2 2p2 contains several options of spins and z angular momentum. And those affect energy.
This is why those symbols are often used when talking about energy differences: they specify more precisely which levels you are talking about.
Basically, each term symbol appears to represent a group of possible electron configurations with a given quantum angular momentum.
We first fix the energy level by saying at which orbital each electron can be (hyperfine structure is ignored). It doesn't even have to be the ground state: we can make some electrons excited at will.
The best thing to learn this is likely to draw out all the possible configurations explicitly, and then understand what is the term symbol for each possible configuration, see e.g. term symbols for carbon ground state.
It also confusing how uppercase letters S, P and D are used, when they do not refer to orbitals s, p and d, but rather to states which have the same angular momentum as individual electrons in those states.
It is also very confusing how extremelly close it looks to spectroscopic notation!
The form of the term symbol is:
The can be understood directly as the degeneracy, how many configurations we have in that state.
Video 1.
Atomic Term Symbols by TMP Chem (2015)
Source.
Video 2.
Atomic Term Symbols by T. Daniel Crawford (2016)
Source.
Radeon by Ciro Santilli 35 Updated +Created
Basic TLB operation by Ciro Santilli 35 Updated +Created
After a translation between linear and physical address happens, it is stored on the TLB. For example, a 4 entry TLB starts in the following state:
  valid  linear  physical
  -----  ------  --------
> 0      00000   00000
  0      00000   00000
  0      00000   00000
  0      00000   00000
The > indicates the current entry to be replaced.
And after a page linear address 00003 is translated to a physical address 00005, the TLB becomes:
  valid  linear  physical
  -----  ------  --------
  1      00003   00005
> 0      00000   00000
  0      00000   00000
  0      00000   00000
and after a second translation of 00007 to 00009 it becomes:
  valid  linear  physical
  -----  ------  --------
  1      00003   00005
  1      00007   00009
> 0      00000   00000
  0      00000   00000
Now if 00003 needs to be translated again, hardware first looks up the TLB and finds out its address with a single RAM access 00003 --> 00005.
Of course, 00000 is not on the TLB since no valid entry contains 00000 as a key.
Janelia Research Campus by Ciro Santilli 35 Updated +Created
The art of programming by Ciro Santilli 35 Updated +Created
Just art:
  • useless mathy stuff
  • incredibly nifty little tools that are just so satisfying to use it is mind blowing:
  • media related stuff
Parenteral nutrition by Ciro Santilli 35 Updated +Created
For some reason, this is one of the things that makes Ciro Santilli want to puke the most. More than surgery or blood.
Markov chain by Ciro Santilli 35 Updated +Created
A directed weighted graph where the sum of weights of all outgoing edges equals 1.
Fallacy by Ciro Santilli 35 Updated +Created
Video sharing website by Ciro Santilli 35 Updated +Created
Human Genome Project by Ciro Santilli 35 Updated +Created
As mentioned by Craig Venter in 100 Greatest Discoveries by the Discovery Channel (2004-2005), the main outcomes of the project were:
  • it established the ballpark number of human genes
  • showed that human genomes are very similar across individuals.
Important predecessors:
ABO blood group system by Ciro Santilli 35 Updated +Created
Human genetic variation by Ciro Santilli 35 Updated +Created
Genetically modified mouse by Ciro Santilli 35 Updated +Created
Human immortalised cell line by Ciro Santilli 35 Updated +Created

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