Business
More than 1.5 million people streamed through U.S. airport security checkpoints on Sunday, the largest number since the pandemic tightened its grip on the United States more than a year ago.
Mar 22, 2021
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4
Computer Sciences
Proposals to create a national gun registry have long been met with fierce opposition from gun rights advocates. While proponents say a registry would help in tracking guns used in crimes, opponents worry that it would compromise ...
Mar 15, 2021
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Business
The U.S. airline industry is pledging to expand the practice of asking passengers on flights to the United States for information that public health officials could use for contact tracing during the pandemic.
Feb 20, 2021
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Security
Police have arrested 10 people in the U.K., Belgium and Malta for allegedly hijacking mobile phones belonging to U.S. celebrities including internet influencers, sports stars and musicians to steal personal information and ...
Feb 10, 2021
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Business
Ahmed Sadiq thought he understood the extent of data breaches at big companies like Facebook. Then he started researching.
Dec 17, 2020
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Internet
Facebook Inc. said it labeled 167 million user posts this year for including information about COVID-19 that was "debunked" by the social network's fact-checkers.
Nov 23, 2020
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Business
When Google says some of its controversial tracking features are "opt-in" only, do you realize you've actually agreed to let them snoop on you? Take, for instance, Google's new Pay app.
Nov 23, 2020
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Energy & Green Tech
Alternative fuels originating either from renewable or circular-economy feedstock will not bring penalties in terms of number-based particle emissions in high- or medium-speed non-road engines. This is a conclusion of Teemu ...
Nov 13, 2020
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Computer Sciences
A pair of statisticians at the University of Waterloo has proposed a math process idea that might allow for teaching AI systems without the need for a large dataset. Ilia Sucholutsky and Matthias Schonlau have written a paper ...
Internet
Ireland's data protection agency is investigating Instagram following concerns over how the image-sharing social platform handles children's personal data, a spokesman said Monday.
Oct 19, 2020
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15
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.
This text uses material from Wikipedia, licensed under CC BY-SA
