News tagged with number
Pasta-shaped radio waves beamed across Venice
A group of Italian and Swedish researchers appears to have solved the problem of radio congestion by cleverly twisting radio waves into the shape of fusilli pasta, allowing a potentially infinite number of channels to be ...
Mar 02, 2012 |
4.8 / 5 (36) |
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A classic model for ecological stability revised, 40 years later
A famous mathematical formula which shook the world of ecology 40 years ago has been revisited and refined by two University of Chicago researchers in the current issue of Nature.
Feb 19, 2012 |
4.1 / 5 (8) |
4
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Neural network learns to identify group sizes without knowledge of numbers
(PhysOrg.com) -- A cognitive sciences research duo out of Università di Padova, in Italy, have succeeded in building an artificial intelligence network that has through repetition, learned to identify relative group ...
Technology / Computer Sciences
Jan 23, 2012 |
5 / 5 (6) |
1
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Internet address expansion set despite ".worries." (Update)
Bidding will begin this week for words and brand names such as ".sport," ".NYC" and ".bank" to join ".com" as online monikers.
Jan 10, 2012 |
3.5 / 5 (4) |
10
CNT paper-based wireless sensor could help detect explosive devices
(PhysOrg.com) -- Researchers at the Georgia Institute of Technology have developed a prototype wireless sensor capable of detecting trace amounts of a key ingredient found in many explosives.
Nanotechnology / Nanomaterials
Oct 27, 2011 |
5 / 5 (3) |
1
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Facial recognition software could reveal your social security number
According to a new study which will be presented August 4 at the Black Hat security conference in Las Vegas, technology has made it possible to identify and gain the personal information of strangers by using facial recognition ...
Aug 02, 2011 |
5 / 5 (7) |
6
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New algorithm provides new insights into evolutionary exodus out of Africa
Researchers have probed deeper into human evolution by developing an elegant new technique to analyse whole genomes from different populations. One key finding from the Wellcome Trust Sanger Institute's study is that African ...
Jul 13, 2011 |
4.3 / 5 (14) |
5
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Words help people form mathematical concepts (w/ Video)
(PhysOrg.com) -- Language may play an important role in learning the meanings of numbers, scholars at the University of Chicago report.
Medicine & Health / Psychology & Psychiatry
Feb 07, 2011 |
4.8 / 5 (13) |
9
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Scientists find first evidence that many universes exist
(PhysOrg.com) -- By looking far out into space and observing what’s going on there, scientists have been led to theorize that it all started with a Big Bang, immediately followed by a brief period of ...
Dec 17, 2010 |
4.4 / 5 (94) |
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Time likely to end within 5 billion years, physicists calculate
(PhysOrg.com) -- As far as astrophysicists can tell, the universe is expanding at an accelerating rate, and will likely continue to do so indefinitely. But now some physicists are saying that this theory, ...
Oct 01, 2010 |
3 / 5 (59) |
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Random numbers game with quantum dice
(PhysOrg.com) -- A simple device measures the quantum noise of vacuum fluctuations and generates true random numbers.
Sep 09, 2010 |
4.9 / 5 (19) |
17
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The 'Magic' of Tin
(PhysOrg.com) -- The metal tin lacks the value and prestige of gold, silver, and platinum -- but to nuclear physicists, tin is magic.
Aug 06, 2010 |
4.1 / 5 (27) |
10
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Attacking the edges of secure Internet traffic
(AP) -- Researchers have uncovered new ways that criminals can spy on Internet users even if they're using secure connections to banks, online retailers or other sensitive Web sites.
Jul 30, 2010 |
4.9 / 5 (9) |
0
Researchers show how to use mobiles to spy on people
(PhysOrg.com) -- Researchers have demonstrated how it is possible to use GSM (Global System for Mobile communications) data along with a few tools to track down a person’s mobile phone number and their location, ...
Apr 22, 2010 |
4.8 / 5 (16) |
9
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Random, but not by chance: A quantum random-number generator for encryption, security
Researchers have devised a new kind of random number generator, for encrypted communications and other uses, that is cryptographically secure, inherently private and - most importantly - certified random by ...
Apr 14, 2010 |
5 / 5 (21) |
0
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Number
A number is a mathematical object used to count and measure. In mathematics, the definition of number has been extended over the years to include such numbers as zero, negative numbers, rational numbers, irrational numbers, and complex numbers.
Mathematical operations are certain procedures that take one or more numbers as input and produce a number as output. Unary operations take a single input number and produce a single output number. For example, the successor operation adds one to an integer, thus the successor of 4 is 5. Binary operations take two input numbers and produce a single output number. Examples of binary operations include addition, subtraction, multiplication, division, and exponentiation. The study of numerical operations is called arithmetic.
A notational symbol that represents a number is called a numeral. In addition to their use in counting and measuring, numerals are often used for labels (telephone numbers), for ordering (serial numbers), and for codes (e.g., ISBNs).
In common use, the word number can mean the abstract object, the symbol, or the word for the number.
For more information about Number, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
