Primitive computing - Rediscovering prehistoric numbering systems - 2

Loading...

Sign in or sign up now!
Alert icon
Upgrade to the latest Flash Player for improved playback performance. Upgrade now or more info.
779 views
Loading...
Alert icon
Sign in or sign up now!
Alert icon

Uploaded by on Feb 18, 2010

[2010-02-19]
Converting a number from vigesimal to sexagesimal, then to decimal using a prehistoric computer (freely inspired from roman abacus, soroban, or soroban-like reconstructions of the nepohualtzintzin enhanced to base 60) -

Converted number : Mayan long count for year 2010 : 12.19.17 (that is 12*400 + 19*20 + 17)

Finding 5197.

See info on ancient numbering systems and primitive computers :

http://www.fourmilab.ch/documents/calendar/
http://geocities.ws/abacosoroban/nepohualtzintzin.pdf
http://emr.cs.iit.edu/home/reingold/calendar-book/Calendrica.html

http://en.wikipedia.org/wiki/Mesoamerican_Long_Count_calendar

http://en.wikipedia.org/wiki/Inuit_numerals

http://en.wikipedia.org/wiki/Abacus

http://www.science.org.au/nova/073/073key.htm

http://www.tacomacc.edu/home/jkellermeier/Ethnomath/index.htm

http://www1.aiatsis.gov.au/exhibitions/e_access/serial/m0005975_v_a.pdf

http://jaie.asu.edu/v40/V40I2A1.pdf

http://www.sizes.com/time/cal_chinese.htm

Numbers I'll use in this video or others : number of the current year in various systems (source : see above).
Gregorian : 2010
Modified Julian Day : 55240 (days)
Islamic : 1431
Persian : 1388
Hebrew : 5770
Chinese : 78 cycles, year Gengyin
[78x60 + 27 = 4707 = 1x (60x60) + 18x60 + 27
= 1.18.27 base 60; or Huangdi 4708 (?!)]
Egyptian : 2758
Coptic : 1726
Hindu Lunar (old) :5110
French : 218
Mayan (long count) :12.19.17.0.0 (12*400 + 19*20 + 17 ~years of 360 days = 12.19.17 base 20)

  • likes, 0 dislikes

Link to this comment:

Share to:
see all

All Comments (0)

Sign In or Sign Up now to post a comment!
Loading...
Alert icon
0 / 00Unsaved Playlist Return to active list
    1. Your queue is empty. Add videos to your queue using this button:
      or sign in to load a different list.
    Loading...Loading...Saving...
    • Clear all videos from this list
    • Learn more