Uploaded by freejutube 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)
Category:
Tags:
- Primitive
- computing
- boulier
- abacus
- counting
- rods
- счёты
- soroban
- mayan
- long
- count
- inuit
- japanese
- chinese
- aboriginal
- vigesimal
- sub-bases
- decimal
- sexagesimal
- quintal
- year
- 2010
- 12.19.17
- base
- 20
- 218
- 1431
- 5770
- 1388
- 2758
- 5110
- 1726
- 55240
- 4707
- 78
- cycles
- Geng-Yin
- 1.18.27
- 60
- 算筹
- 算木
- そろばん
- 算盘
- Абак
- Numeración
- con
- varillas
- Nepohualtzintzin
- Nepohualtzitzin
- quipu
- yupana
- shell
- as
- zero
- tepohuatzinzin
- nepohualzinzin
License:
Standard YouTube License
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