Error message
- Deprecated function: TYPO3\PharStreamWrapper\Manager::initialize(): Implicitly marking parameter $resolver as nullable is deprecated, the explicit nullable type must be used instead in include_once() (line 19 of includes/file.phar.inc).
- Deprecated function: TYPO3\PharStreamWrapper\Manager::initialize(): Implicitly marking parameter $collection as nullable is deprecated, the explicit nullable type must be used instead in include_once() (line 19 of includes/file.phar.inc).
- Deprecated function: TYPO3\PharStreamWrapper\Manager::__construct(): Implicitly marking parameter $resolver as nullable is deprecated, the explicit nullable type must be used instead in include_once() (line 19 of includes/file.phar.inc).
- Deprecated function: TYPO3\PharStreamWrapper\Manager::__construct(): Implicitly marking parameter $collection as nullable is deprecated, the explicit nullable type must be used instead in include_once() (line 19 of includes/file.phar.inc).
- Deprecated function: UpdateQuery::expression(): Implicitly marking parameter $arguments as nullable is deprecated, the explicit nullable type must be used instead in require_once() (line 1884 of includes/database/database.inc).
- Deprecated function: MergeQuery::expression(): Implicitly marking parameter $arguments as nullable is deprecated, the explicit nullable type must be used instead in require_once() (line 1884 of includes/database/database.inc).
- Deprecated function: SelectQueryInterface::getArguments(): Implicitly marking parameter $queryPlaceholder as nullable is deprecated, the explicit nullable type must be used instead in require_once() (line 1884 of includes/database/database.inc).
- Deprecated function: SelectQueryInterface::preExecute(): Implicitly marking parameter $query as nullable is deprecated, the explicit nullable type must be used instead in require_once() (line 1884 of includes/database/database.inc).
- Deprecated function: SelectQueryExtender::getArguments(): Implicitly marking parameter $queryPlaceholder as nullable is deprecated, the explicit nullable type must be used instead in require_once() (line 1884 of includes/database/database.inc).
- Deprecated function: SelectQueryExtender::preExecute(): Implicitly marking parameter $query as nullable is deprecated, the explicit nullable type must be used instead in require_once() (line 1884 of includes/database/database.inc).
- Deprecated function: SelectQuery::getArguments(): Implicitly marking parameter $queryPlaceholder as nullable is deprecated, the explicit nullable type must be used instead in require_once() (line 1884 of includes/database/database.inc).
- Deprecated function: SelectQuery::preExecute(): Implicitly marking parameter $query as nullable is deprecated, the explicit nullable type must be used instead in require_once() (line 1884 of includes/database/database.inc).
A bit is a binary digit, taking a value of either 0
or 1. For example, the number 10010111 is 8 bits long, or in most cases,
one modern PC byte. Binary digits are a basic unit of
information and communication in digital computing and digital
information theory. Information theory also often uses the natural
digit, called either a nit or a nat. Quantum computing
also uses
qubits,
a single piece of information with a probability of being true.
The bit is also a unit of measurement, the information capacity of
one binary digit. It has the symbol bit, or
b (see discussion below). The unit is also known as the
shannon, with symbol Sh.
Histrorical background
Claude E. Shannon first used the word bit in his 1948 paper A
Mathematical Theory of Communication. He attributed its origin to
John W. Tukey, who had written a Bell Labs memo on 9 January 1947 in
which he contracted "binary digit" to simply "bit". Interestingly,
Vannevar Bush had written in 1936 of "bits of information" that could be
stored on the punch cards used in the mechanical computers of that
time.
A bit of storage is like a light switch; it can be either on (1) or
off (0). A single bit is a one or a zero, a true or a false, a "flag"
which is "on" or "off", or in general, the quantity of information
required to distinguish two mutually exclusive equally probable states
from each other. Gregory Bateson defined a bit as "a difference that
makes a difference"
Category:Quantum
Information Theory
category:Handbook
of Quantum Information
Last modified:
Monday, October 26, 2015 - 17:56
