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  2. Thermoelectric generator - Wikipedia

    en.wikipedia.org/wiki/Thermoelectric_generator

    The typical efficiency of TEGs is around 5–8%, although it can be higher. Older devices used bimetallic junctions and were bulky. More recent devices use highly doped semiconductors made from bismuth telluride (Bi 2 Te 3), lead telluride (PbTe), [10] calcium manganese oxide (Ca 2 Mn 3 O 8), [11] [12] or combinations thereof, [13] depending on application temperature.

  3. Deseret (Unicode block) - Wikipedia

    en.wikipedia.org/wiki/Deseret_(Unicode_block)

    Deseret (/ ˌ d ɛ z ə ˈ r ɛ t / ⓘ) is a Unicode block containing characters in the Deseret alphabet, which were invented by the Church of Jesus Christ of Latter-day Saints (LDS Church) to write English.

  4. Musical cryptogram - Wikipedia

    en.wikipedia.org/wiki/Musical_cryptogram

    The methods used historically by composers were either too incomplete (i.e., did not include all of the letters of the alphabet) or too simplistic to meaningfully encrypt long text messages. There is a separate history of music ciphers utilizing music notation to encode messages for reasons of espionage or personal security that involved ...

  5. Phoneword - Wikipedia

    en.wikipedia.org/wiki/Phoneword

    One brief practice was when the successive toll-free area codes were introduced (888, 877, 866, etc.), a business word or phrase would actually use one or more of the numbers in the area code. Examples of this were Rent-A-Wreck (1-87-RENT-A-WRECK or 1-US-RENT-A-WRECK), Speedpass (1-87-SPEEDPASS), and one of the first Vonage numbers (1-VONAGE ...

  6. Cistercian numerals - Wikipedia

    en.wikipedia.org/wiki/Cistercian_numerals

    Uses the Private Use Area, since Unicode has declined to assign character codes. Font characters are segments, to be combined into the complete numerals. Cistercian number generator at dCode. Uses digit shapes similar to the astrolabe (vertical stave, triangular 5). L2/20-290 Background for Unicode consideration of Cistercian numerals

  7. Atbash - Wikipedia

    en.wikipedia.org/wiki/Atbash

    Under the standard affine convention, an alphabet of m letters is mapped to the numbers 0, 1, ... , m − 1. (The Hebrew alphabet has m = 22, and the standard Latin alphabet has m = 26). The Atbash cipher may then be enciphered and deciphered using the encryption function for an affine cipher by setting a = b = ( m − 1):

  8. Huffman coding - Wikipedia

    en.wikipedia.org/wiki/Huffman_coding

    Huffman tree generated from the exact frequencies of the text "this is an example of a huffman tree". Encoding the sentence with this code requires 135 (or 147) bits, as opposed to 288 (or 180) bits if 36 characters of 8 (or 5) bits were used (This assumes that the code tree structure is known to the decoder and thus does not need to be counted as part of the transmitted information).

  9. Caesar cipher - Wikipedia

    en.wikipedia.org/wiki/Caesar_cipher

    The transformation can be represented by aligning two alphabets; the cipher alphabet is the plain alphabet rotated left or right by some number of positions. For instance, here is a Caesar cipher using a left rotation of three places, equivalent to a right shift of 23 (the shift parameter is used as the key):