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Topic: Positional system


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In the News (Mon 28 Dec 09)

  
  Numeral system - Wikipedia, the free encyclopedia
Numeral systems are sometimes called number systems, but that name is misleading: different systems of numbers, such as the system of real numbers, the system of complex numbers, the system of p-adic numbers, etc., are not the topic of this article.
The sign-value system does not need arithmetic numerals because they are made by repetition (except for Ionic system), and the positional system does not need geometric numerals because they are made by position.
Sexagesimal numerals were a Mixed radix system that retained the alternating base 10 and base 6 in a sequence of cuneiform vertical wedges and chevrons and was by 1950 BC a positional notation system.
en.wikipedia.org /wiki/Numeral_system   (3590 words)

  
 Positional notation - Wikipedia, the free encyclopedia
Positional notation or place-value notation is a numeral system in which each position is related to the next by a constant multiplier, a common ratio, called the base (or radix) of that numeral system.
The idea of indicating magnitude by means of position was embodied long ago by the use of the abacus in all its various forms.
The sexagesimal or base sixty system was used for the integral and fractional portions of Babylonian numerals, by Hellenistic astronomers using Greek numerals for the fractional portion only, and is still used for modern time and angles, but only for minutes and seconds.
en.wikipedia.org /wiki/Positional_notation   (1124 words)

  
 Positional notation
Positional notation or place-value notation is a numeral system in which each position is related to the next by a constant multiplier called the base (or radix) of that numeral system.
With an abacus to perform arithmetic operations, the writing of the starting, intermediate and final values of a calculation could easily be done with a simple additive system such as Roman Numerals.
A hypothetical Roman numeral positional system would separate each position with punctuation marks but would not necessarily require a symbol for zero.
www.algebra.com /algebra/about/history/Positional-notation.wikipedia   (1068 words)

  
 Wikinfo | Numeral system   (Site not responding. Last check: 2007-10-31)
The simplest numeral system is the unary system, in which every natural number is represented by a corresponding number of symbols.
More elegant is a positional notation: again working in base 10, we use ten different digits 0,...,9 and use the position of a digit to signify the power of ten that the digit is to be multiplied with, as in 304 = 3*100 + 0*10 + 4.
Arithmetic is much easier in positional systems than in the earlier additive ones; furthermore, additive systems have a need for a potentially infinite number of different symbols for the different powers of 10; positional systems need only 10 different symbols.
www.wikinfo.org /wiki.php?title=Numeral_system   (1480 words)

  
 Positional feedback system for medical mattress systems - Patent 5611096
The apparatus comprises an angular position sensor and a rotation sensor which are housed together in an enclosure having a top surface in the form of a circular plate.
With flexible mattresses, to position any foreign devices in closer proximity to a patient, because a patient might be injured by contact with the device would be steadfastly avoided, mounting a sensor to a rigid base board helps shield a patient from contact with the sensor.
The angular position and rotation sensors measure the angular position of the mattress's surface in relation to the horizontal and vertical planes, respectively.
www.freepatentsonline.com /5611096.html   (9297 words)

  
 Positional control method and system utilizing same - Patent 4727303
The system comprises first generating means for generating a position feedback signal related to the position of the shaft, second generating means for generating a function related to the velocity of the shaft and first combining means for combining the position command signal and the position feedback signal to obtain a position error signal.
The system further comprises calculating means for calculating a first control signal related to the position error signal and integrating means for integrating the position error signal multiplied by a function of the velocity signal to obtain a second control signal.
The actual position of the output shaft is stored in a buffer register 34 which may be used to increment or decrement an up-down counter or register 36 of the control 28.
www.freepatentsonline.com /4727303.html   (3583 words)

  
 Numeral verses Number
In a positional system no multiplier is needed, the value of the symbol is understood by its position in the number.
The Hindu-Arabic System (the one we use) is a positional system.
To represent a number in a positional system you simply put the numeral in the appropriate place in the number, and its value is determined by its location.
www1.broward.edu /~amatthew/Num1.htm   (409 words)

  
 PlanetMath: digital number system
written number systems are built upon the concept of a digital system (or positional system) for their functioning and conveying of quantitative meaning.
Intuitively this makes sense: when we try to represent the number which follows “9” in the decimal system, we know it must be “10”, since there is no symbol after “9.” Hence, position as well as symbol conveys the meaning, and base tells us how much a unit in each position is worth.
This is version 6 of digital number system, born on 2002-08-18, modified 2005-12-10.
planetmath.org /encyclopedia/NumericalBase.html   (325 words)

  
 Zero
The path that leads to the discovery of "0" lies only in the most advanced type of number system, which is called "positional" because the value of a character depends on its position.
Another feature of positional number systems is that they lack special symbols for numbers which are orders of magnitude of the base number.
This is necessary in an additive system, for simplicity of notation and record-keeping, but it is incompatible with a positional system.
www.etymonline.com /zero.php   (724 words)

  
 A Logical Alternative to the Existing Positional Number System
The advantages of this alternative system over the existing one are discussed, and an illustration of the use of the system to re-interpret apparent errors in ancient archaeological documents is presented.
Notice that, with the exception of integers that have digits equal to zero in the existing system, all other numbers remain the same as in the alternative system as long as the digits lie between 1 and (b-1) inclusive.
However, the alternative system, with its inherent simplicity, illustrates that the introduction of zero may have unnecessarily complicated the use of integers, and numbers in general.
my.tbaytel.net /forslund/rrf01.html   (1418 words)

  
 Math Lair - Babylonian Mathematics   (Site not responding. Last check: 2007-10-31)
The Hindu-Arabic number system that we use today is also a positional system.
In a positional (or place value) number system, the position of the number indicates the value attached to it.
Still, the invention of a positional system was a great achievement in mathematics, Considering that millennia later the Greeks still used cumbersome number systems like the Attic and Ionic numerals.
www.stormloader.com /ajy/babylonian.html   (471 words)

  
 Binary System
The Binary System of numeration is the simplest of all positional number systems.
We might say thousand to indicate a 1 in the fourth position from the right regardless of the base of the system in use, but this would conflict with the etymology of the word thousand, and the same is true of the word hundred.
Naming them according to a positional system of numeration was probably a single most important mathematical achievement over the space of some 1000 years.
www.cut-the-knot.org /do_you_know/BinaryHistory.shtml   (1590 words)

  
 Teaching Models: Grade 1
The Hindu-Arabic system of enumeration we use is described as a base-ten positional number system.
The importance and power of a positional numeration system cannot be understated.
The fact that there are unique word names for 11 and 12 may indicate that at one time 11 and 12 were used as bases in a positional number system instead of 10.
www.eduplace.com /math/mw/models/overview/1_10_2.html   (466 words)

  
 The Enneagram - History of the Decimal System
A noteworthy characteristic of the Chinese system, and one that represented a substantial advantage over the Mediterranean systems, was its predilection for a decimal notation, as demonstrated by foot rulers dating back as far as the 6th century BC.
Because the Chinese Hua Ma system (see Chinese numerals) is also a positional base-10 system, Hau Ma numerals—or some numeral system similar to it—may have been the inspiration for the base-10 positional numeral system that evolved in India.
Muslim scientists used the Babylonian numeral system, and merchants used a numeral system similar to the Greek numeral system and the Hebrew numeral system.
www.endlesssearch.co.uk /philo_enneagram_dec.htm   (796 words)

  
 Indian numerals
The word-numeral system, later replaced by an alphabetic notation, was the logical outcome of proceeding by multiples of ten.
The decimal place-value system developed when a decimal scale came to be associated with the value of the places of the numbers arranged left to right or right to left.
All that we know is that the place-value system of the Indians, however it arose, was transmitted to the Arabs and later into Europe to have, in the words of Laplace, profound importance on the development of mathematics.
www-groups.dcs.st-andrews.ac.uk /~history/HistTopics/Indian_numerals.html   (2571 words)

  
 Mathematics Magazine
Yet neither the Sumerian nor the Akkadian system was a positional system and this advance by the Babylonians was undoubtedly their greatest achievement in terms of developing the number system.
Now of course this comment is based on knowledge of our own decimal system which is a positional system with nine special symbols and a zero symbol to denote an empty place.
Now although the Babylonian system was a positional base 60 system, it had some vestiges of a base 10 system within it.
www.mathematicsmagazine.com /NumberSystems/BabylonianNumerals.htm   (343 words)

  
 Base-n Concepts
The decimal number system (called arabic numerals) is a positional number system.
Thus in the decimal number, 3257, the 3 is multiplied by a thousand, the 2 is multiplied by a hundred, the 5 is multiplied by ten, and the 7 is multiplied by 1 (namely not changed at all).
All these notations use the same system based on the value of n - which is called the radix of the number notation.
core.ecu.edu /csci/wirthj/Basen/basen-c.html   (2813 words)

  
 Positional frames of reference in motor control: Origin and use
Another possibility is that the system may ignore limb geometry and specify constant rates of R commands to shift the limb endpoint in the desired direction (m).
B: Tonic level of EMG in positions b and c may be the same demonstrating a similar problem as in A. C, D: Shading in rectangles represents the levels of descending facilitation to ` MNs in an initial (b) and a final (c) position (as in B).
The system arrives at position c in which the tonic level of MN activity is the same as in position b.
www.bbsonline.org /Preprints/OldArchive/bbs.feldman.html   (20830 words)

  
 Binary, Octal, Hexadecimal Systems, Base Convertion
B stands for the decimal 11 in any number system with base greater than 11, and so on.
Representation of a number in a system with base (radix) N may only consist of digits that are less than N. (The converter works this way: first type a number in the base you wish to convert from.
Once you know how to do that in the decimal system, you are supposed to know how to handle the same thing in other bases.
www.cut-the-knot.org /binary.shtml   (604 words)

  
 Number System Conversion - Explanation
Our decimal number system is known as a positional number system, because the value of the number depends on the position of the digits.
In a positional number system, the value of each digit is determined by which place it appears in the full number.
The lowest place value is the rightmost position, and each successive position to the left has a higher place value.
www.cstc.org /data/resources/60/convexp.html   (398 words)

  
 The binary system
We say that the decimal system is a positional system because the meaning of these sym You already know that in the number 232, the first 2 stands for 200 because of its position on the left, while the second 2 stands for just 2 because of its position on the right.
We use 10 symbols (1, 2, 3,..., 8, 9 and 0) and their position matters: the decimal system, also called "base 10", is a positional system.
The binary system is a positional system where we are allowed just two symbols, 0 and 1.
brooklyngoclub.org /openetwork/binary.html   (210 words)

  
 Number Systems
Positional notation means that the value of a digit in a number depends on its location in the number.
In the decimal number system the positional value is a power of the base 10.
Octal number system positional value is a power of the base 8.
www.bucks.edu /~cornelld/numbersystem.htm   (486 words)

  
 Bergman's number system   (Site not responding. Last check: 2007-10-31)
However at the dawn of the computer era the new original discovery in the number system theory was made.
This one was directed on the overcoming the second essential lack of the binary number system, the problem of the "zero" redundancy.
Although Bergman's paper contained the result of great importance for the number system theory, however in that period it simply was not noted either by mathematicians or engineers.
www.goldenmuseum.com /1405Bergman_engl.html   (432 words)

  
 Positional Scarcity
The systems that we have seen generally say that you take a scarce position and increase the value of players there because they are hard to come by.
Thus, a system that allocates 200 at bats to the 60th outfielder and 200 at-bats to the 24th catcher is not mirroring reality.
Whenever anyone in your league espouses positional scarcity, praise them for their insight and knowledge and don’t laugh until you are out of earshot.
www.stallvalue.com /sveps.htm   (1431 words)

  
 Binary code, Hexidecimal code and Positional Number Systems
This is numbering system seems natural to us but is arbitrarilly based on the fact that humans have ten fingers.
If we were to keep counting to 100 we would then have a 1 in then hundreds position, a 0 in the tens position and a 0 in the ones position.
Just as explained above, when a 1 is in the ones position, it is equal to 1, when it is in the tens position, it is equal to 10.
home.att.net /~gobruen/progs/binhex.html   (966 words)

  
 Bit,s, Bytes and Number Systems- Decimal, Binary, Hexadecimal, Octal. ASCII Codes. Reference for programmers   (Site not responding. Last check: 2007-10-31)
But we also use other number systems, think of time (base 60, and base 10 within it), imperial distance yards and feet (base 3), there are many others, dates probably being the hardest number system to do calculations with.
The every day number system we use is the denary system, sometimes called the decimal system.
Because you are so used to the denary system and because it is very easy to multiply by 10, 100, or a 1000 etc you calculate the number in your head.
members.aol.com /M206ou/m206/M206_Smalltalk_tutorial_ascii.htm   (1165 words)

  
 Hexadecmial (HEX) number system
A number in the hex system is the symbol used to represent a unit or quantity.
The base, or radix, of this system is 16, which represents the number of symbols used in the system.
You can see from the positional values that usually fewer symbol positions are required to express a number in hex than in decimal.
www.tpub.com /neets/book13/53g.htm   (660 words)

  
 [No title]
The number of digits is equal to the base or radix of the numbering system, decimal is base 10, binary is base 2.
A numbering system can have any base, some common bases used with computers are: Common Bases BaseDigits Radixbinary0, 1 2octal0,1,2,3,4,5,6,7 8decimal0,1,2,3,4,5,6,7,8,9 10hexadecimal0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F 16 There are two basic types of number systems; non-positional and positional.
The decimal and binary systems are positional, the digits place in the number is assigned a power of the base.
www.wiu.edu /users/mubmt1/binary.doc   (381 words)

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