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Mnemonic

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A mnemonic (pronounced [nəˈmɑnɪk] in American English, [nəˈmɒnɪk] in British English) is a memory aid. Mnemonics are often verbal, something such as a very short poem or a special word used to help a person remember something, particularly lists. Mnemonics rely not only on repetition to remember facts, but also on associations between easy-to-remember constructs and lists of data, based on the principle that the human mind much more easily remembers data attached to spatial, personal or otherwise meaningful information than that occurring in meaningless sequences. The sequences must make sense though. If a random mnemonic is made up, it is not necessarily a memory aid.

The word mnemonic is derived from the Ancient Greek word μνημονικός mnemonikos ("of memory") and is related to Mnemosyne ("remembrance"), the name of the Mother of the Muses in Greek mythology. Both of these words refer back to μνημα mnema ("remembrance"). The first known reference to mnemonics is the method of loci described in Cicero's De Oratore.

The major assumption is that there are two sorts of memory: the "natural" memory and the "artificial" memory. The former is inborn, and is the one that everyone uses every day. The artificial memory is one that is trained through learning and practicing a variety of mnemonic techniques. The latter can be used to perform feats of memory that are quite extraordinary, impossible to carry out using the natural memory alone.

Egg and spear or number shape system

This is another peg system, much like the number-rhyme system but more suitable for those with visual learning styles (a one looks like a candle; a two looks like a swan, and so on).

  1. Candle, spear
  2. Swan
  3. Bosom
  4. Sail
  5. Hook
  6. Club
  7. Cliff
  8. Hourglass
  9. Flag
  10. A candle next to an egg

Visual mnemonics

Visual mnemonics are very popular in medicine as well as other fields. In this technique, an image portrays characters or objects whose name sounds like the item that has to be memorized. This object then interacts with other similarly portrayed objects that in turn represent associated information.

Examples of simple first letter mnemonics

One common mnemonic device for remembering lists consists of an easily remembered word, phrase, or rhyme whose first letters are associated with the list items. The idea lends itself well to memorizing hard-to-break passwords as well. Though easy to derive, they are often not as powerful as the classical systems because they do not make use of visualization techniques.

Science and technology

Biology, medicine, and anatomy

Medical mnemonics are quite common, see [link]. Some of them are less politically correct than others, and some are profane (presumably because their shock value makes them easier to remember). The list below doesn't censor, but in some cases does provide "clean" alternatives.

An example of a visual mnemonic for the drug "hydralazine" could be represented as "lazy hydra" that is on strike holding a sign "NO more work". "NO" in the above case symbolizes Nitrous oxide, which is related to the drug's mechanism of action. For examples of this technique, see [link].[It should be noted that NO is actually the symbol for Nitric Oxide, which has a markedly different effect on the body...]

(Many variants exist. Mnemonics for the cranial nerves vary, because the auditory nerve is also known as the Vestibulocochlear nerve and the accessory nerve is also known as the Spinal accessory nerve.)

An example of simple yet effective medical mnemonic, often employed to assist first-year medical students of UNSW (Australia) is "CHINPIG". This outlines the 7 empirical causes of cell death, which are "Chemical, Hypoxia, Infection, Nutritional, Physical, Immunologic, Genetic".

Biological groupings in
(The letters stand for Kingdom, Phylum, Class, Order, Family, Genus, and Species.)
  • "Kings Play Cards On Fat Green Stools p. 155, ""Kings Play Cards On Fairly Green Stools ("Kingdom, Phylum, Class, Order, Family, Genus, Species) or "Kids Pour Catsup Over Green Spiders "Kingdom, Phylum, Class, Order, Genus, Species)"�UNIQ5b5164d93d38d469-HTMLCommentStrip2c72fe8c1a81ee0d00000001
  • "King Phillip Came Over For Good Spaghetti"
  • "Kinky Pat Came Over For Great Sex"

Chemistry

Electronics

The electronic color code is used to indicate numerical values or ratings of electronic components, with bands or spots of Black, Brown, Red, Orange, Yellow, Green, Blue, Violet, Grey, and White corresponding to the digits 0-9. To help remember the sequence of first letters, several mnemonics have been taught to generations of students and apprentices:

The latter is intriguing for its similarity to a mnemonic from less politically correct times (Bad Boys Rape Our Young Girls But Virgins Go Without), perhaps reflecting the changing culture of engineering in the western world as it moves to abandon sexism and to embrace female professionals.

Engineering

Geology

Mathematics

Now I defy a tenet gallantly
Of circle canon law: these integers
Importing circles' quotients are, we see,
Unwieldy long series of cockle burs
Put all together, get no clarity;
Mnemonics shan't describeth so reformed
Creating, with a grammercy plainly,
A sonnet liberated yet conformed.
Strangely, the queer'st rules I manipulate
Being followéd, do facilitate
Whimsical musings from geometric bard.
This poesy, unabashed as it's distressed,
Evolvéd coherent - a simple test,
Discov'ring poetry no numerals jarred. See ["Poe, E.: Near a Raven"] for an extreme example. SOH ... Sine = Opposite leg divided by the Hypotenuse
CAH ... Cosine = Adjacent leg divided by the Hypotenuse
TOA ... Tangent = Opposite leg divided by the Adjacent leg
Mnemonics for remembering SOH-CAH-TOA include:
On a lighter note if one can remember that Santa Claus says "Ho Ho" and then place the three (Sine Cosine and Tangent) in alphabetical order C S T with A at beginning and A at end we have: A HO HO A and C S T. Now simply read these in order and you have: C(theta)= A/H S(theta)=O/H T(theta)=O/A [ \frac \left( \frac \right) =\frac ] To remember which trig functions are positive in the different quadrants: "all students take calculus" or "all students try cheating"

ALL trig functions are positive in Q1 Sin and its inverse are positive in Q2 Tan and its inverse are positive in Q3 Cos and its inverse are positive in Q4

Physics

(Red, Orange, Yellow, Green, Blue, Indigo, Violet).

General knowledge

Sun, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto

Shirley McLane Vomits Every Morning, Jimmy Stewart Usually Never Pukes

My Very Eager Mother Just Served Us Nine Pizzas, which again represents the aforementioned planets, sans the sun.

My Very Easy Mnemonic Just Summed Up Nine Planets

Marks Very Excitable Melanie Just Sits Unmoved Never Playing

My Very Easy Method Just Speeds Up Naming Planets

My Very Energetic Mother Just Saw Uncle Ned Pass

Geography

Military

Music

There are various mnemonics for the bass cleff as well, the space notes ACEG can be remembered as All Cows Eat Grass, while the lines can be remembered as Good Boys Deserve Football (or Favour, or Fudge) Always or Good Boys Do Fine Always

One method for remembering the 6 main concepts of music that is particulary odd, but memorable is: Deranged Possums That Do Stupid Things. Standing for Duration, Pitch, Texture, Dynamics and Expressive Techniques, Structure and Tone Colour (or Timbre)

Another common mnemonic is Father Charles Goes Down And Ends Battle. This is the order of Sharps in a key signature. It also works in reverse for flats: Battle Ends And Down Goes Charles' Father.

The calendar

Knuckle mnemonic
  • The dominical letters for the years 1630, 1730, 1830, and 1930, taken in that order, spell "FACE". This can be remembered by the mnemonic "dirty face" (for "'30 FACE").
  • Anamonics (Scrabble)

    Many tournament Scrabble players employ anamonics, a form of initialization mnemonic, for the purposes of learning and quickly recalling sets of acceptable words. An anamonic consists of a "stem" (usually of six or seven letters), paired with a semantically related phrase, in which each letter of the phrase can be added to the stem and rearranged to form at least one acceptable word. For example, if a player has the tiles ACDEIRT on her rack, and recalls the anamonic "DICE-ART = casino math diploma", they will know precisely which letters may be played through to form 8-letter words, and will hopefully be aided in finding the words: ACCREDIT, RADICATE, ACRIDEST, RATICIDE, DICENTRA, CERATOID, TIMECARD, CITRATED/TETRACID/TETRADIC, TRACHEID, READDICT, PICRATED, and ARTICLED/LACERTID.

    Other mnemonic systems

    Arbitrariness of mnemonics

    A curious characteristic of many memory systems is that mnemonic devices work despite being (or possibly because of being) illogical, arbitrary, and artistically flawed. "Roy" is a legitimate first name, but there is no actual surname "Biv" and of course the middle initial "G" is arbitrary. Why is "Roy G. Biv" easy to remember? Medical students never forget the arbitrary nationalities of the Finn and German. Any two of the three months ending in -ember would fit just as euphoniously as September and November in "Thirty days hath...", yet most people can remember the rhyme correctly for a lifetime after having heard it once, and are never troubled by doubts as to which two of the -ember months have thirty days. A bizarre arbitrary association may stick in the mind better than a logical one.

    One reason for the effectiveness of seemingly arbitrary mnemonics is the grouping of information provided by the mnemonic. Just as US phone numbers group 10 digits into three groups, the name "Roy G. Biv" groups seven colors into two short names and an initial. Various studies (most notably The Magical Number Seven, Plus or Minus Two) have shown that the human brain is capable of remembering only a limited number of arbitrary items; grouping these items into chunks permits the brain to hold more of them in memory.

    Assembly mnemonics

    In assembly language a mnemonic is a code, usually from 1 to 5 letters, that represents an opcode, a number.

    Programming in machine code, by supplying the computer with the numbers of the operations it must perform, can be quite a burden, because for every operation the corresponding number must be looked up or remembered. Looking up all numbers takes a lot of time, and mis-remembering a number may introduce computer bugs.

    Therefore a set of mnemonics was devised. Each number was represented by an alphabetic code. So instead of entering the number corresponding to addition to add two numbers one can enter "add".

    Although mnemonics differ between different CPU designs some are common, for instance: "sub" (subtract), "div" (divide), "add" (add) and "mul" (multiply).

    This type of mnemonic is different from the ones listed above in that instead of a way to make remembering numbers easier, it is a way to make remembering numbers unnecessary (by relying on some external way to tie each mnemonic to a number).

    History of mnemonics

    See the method of loci.

    References

    External links

     


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