Linguistics
No idea what these are:
- Montague grammar
- Universal grammar?
- Generative grammar
- Categorial grammar
- Some terms:
- Noun phrase
- Determiner
- Common noun
- Relative clause
- Transitive verb
Chemistry
- Moles: Avogadro number (
6.623*10²³) of molecules of a substance. - Ion: Atom/molecule with a net electrical charge
- Anion: Negatively charged ion
- Has more electrons than protons
- Cation: Positively charged ion
Molarity
A measure of concentration.
Number of moles of solute per litre of solvent.
Chirality
Chiral molecules are symmetric.
Electron orbitals
- σ-bond
- π-bond
Radioactivity
- Gray (gy):
SI unit of ionizing radiation dose
- Absorbed dose of radiation ʷ
- Absorption of 1J of radiation energy per kg of matter.
- 'measure of the energy deposited in matter by ionizing radiation per unit mass' ʷ
- Becquerel (Bq): SI unit of radiactivity
- 1Bq => one nucleus decays per second
- 1Bq = 1 per second = 1s⁻¹
Geneology
- Ahnentafel (German for 'ancestor table'): A chart of descent of a person from ancestors
- Pedigree chart: Family tree
- Proband: Subject being studied/probed.
Geneology chart symbols (probaby differs):
| Square | Male |
| Circle | Female |
| Diamond | Unknown gender |
| Diagonal from top-right | Deceased |
Source: https://www.genome.gov/Pages/Education/Modules/YourFamilyHealthHistory.pdf
Identical twins:
𐌡
/-\
/ \
□ □
Biology
- mtDNA: mitochondrial DNA
- Mitochondria: 'Powerhouse of the cell'
Civil engineering
Brick grades
- There are different grades of bricks.
- Depending on the amount of load it can withstand.
- Called 'classes' of bricks.
Electrical engineering
- Active and passive filters
- Ideal and real filters
Passive low pass filter
Allow signals of 0Hz to cut-off frequency to pass. ¹
+-----R1-----+
| 1k | ---+
+| | |
Vin ∿ C1 Vout
-| | |
| | ---+
+------+-----+
⏚ Ground
Example values:
Vin is AC voltage SINE(0 10 1K)
- Amplitude of V1 = 10
- C1 = 10μ
- R1 = 1000Ω
Graphs of some (ideal) filters:
Low-pass High-pass Band-pass Band-stop
A A A A
∧ ∧ ∧ ∧
| | | |
|----+ | +------ | +---+ |----+ +----
| P | S | S | P | S | P | S | P | S | P
| a | t | t | a | t | a | t | a | t | a
| s | o | o | s | o | s | o | s | o | s
| s | p | p | s | p | s | p | s | p | s
+----------> ν +----------> ν +----------> ν +--------------> ν
0 fc 0 fc 0 fl fh 0 0 fl fh
History
- A guess:
- Gregarian calendar = 825 + കൊല്ലവര്ഷം