RF Cafe Software
About RF Cafe
1996 - 2016
BSEE - KB3UON
RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...
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Zero: The Biography of a Dangerous Idea, by Edition] Charles Seife on the history of 'zero' - very interesting.
Excedrin Headache #24 Commercial
Even if you are are familiar with the Roman numeral system, did you realize that there is no character to represent zero (0) or that negative Roman numerals do not exist, formally, either? Zero was considered sacrilegious back in the day because it was considered an affront to a Creator who, it was reasoned, could never create nothing so there was no need for a number to represent what didn't exist. Yeah, it's sort of circular reasoning. Some writers say there is no zero because the Greeks and Romans, being manically efficient in mathematics, did not care to waste a place holder in any decade column simply to hold nothing. Negative numbers never were received well by the haute thinkers even though we now routinely equate subtraction with adding a negative number.
Table of Roman Numerals
One of the crazier rules of Roman numbers is that when you approach one number unit symbol less than the next symbol, the lower symbol is placed to the left of the next higher place unit symbol to indicate a subtraction. For example rather than writing 9 as VIIII, you write IX, or 10-1 = 9; XL is the same as 50-10 = 40. Hence XLIX is (50-10) + (10-1) = 40+9 = 49, et voila, Super Bowl 49.
If you don't really want to learn how to translate Roman numbers into standard form, you can always use one of the many online converters, like this one from Roman-Numerals.org. They have a lot of other good info there about the counting system.
Enjoy the game... or at least the Carl's Jr. and other such commercials.
Posted on January 28, 2015