null


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Related to null: null space

null

1. Maths
a. quantitatively zero
b. relating to zero
c. (of a set) having no members
d. (of a sequence) having zero as a limit
2. Physics involving measurement in which an instrument has a zero reading, as with a Wheatstone bridge

null

[nəl]
(mathematics)
Indicating that an object is nonexistent or a quantity is zero.
(navigation)
The azimuth or elevation reading on a navigational device indicated by minimum signal output.
Any of the nodal points on the radiation patterns of some antennas.

null

(programming)
A special value used in several languages to represent the thing referred to by an uninitialised pointer.

<database> A special value that may be stored in some database columns to represent an unknown, missing, not applicable, or undefined value. Nulls are treated completely differently from ordinary values when evaluating SQL expressions and there are several SQL constructs for dealing with nulls.

null

A character that is all 0 bits. Also written as "NUL," it is the first character in the ASCII and EBCDIC data codes. In hex, it displays and prints as 00; in decimal, it may appear as a single zero in a chart of codes, but displays and prints as a blank space.

Nulls are naturally found in binary numbers when a byte contains all zeros, and they are used to pad fields (see padding). A null may function as a delimiter; for example, in C/C++, a null character is inserted at the end of a character string to mark the end of the text.


The Null Is the First
Note the first character at the top of this chart of ASCII characters. The 00 means 0000-0000 bits.
References in periodicals archive ?
Ball-park null allele frequencies were estimated from the number of apparent null allele carrying 'parents' and the total number of (non-excluded) parents in the database after correcting for ascertainment bias.
You should have zeros on the report where the nulls were previously, and the calculations should work.
The decision rules define the strength and type of evidence used to reject or fail to reject the null hypothesis.
Consequently, the position vector of the null osculating curve of the first and second kind satisfies respectively the equations
Curry also suggests that the desire to reverse the null hypothesis may have the goal of seeking to marginalize the climate skeptic movement, a vocal group that has challenged the scientific orthodoxy on climate change.
In this case, [kappa] can take only two values: [kappa] = 0 when [alpha] is a null straight line, or [kappa] = 1 in all other cases.
In the face of this problem, Jaeggli and Safir (1989) argued that null subjects are permitted in morphologically uniform languages, namely those with either only derived or only underived forms in their verb paradigms (like Chinese).
You could use a Null value in this field although it is recommended to use a true value such as "N/A" or "Not Applicable", making information clearer to the user.
At a recent trade show demonstration, Flying Null featured its EMID tags being applied to the inside of cartons, with the tags read from the outside of assembled cartons.
For example, such a null hypothesis might posit that the average amount and intensity of behavior problems in two groups of children occur independently of the presence or absence of marital distress in the youngsters' families.
Null Physics author Terence Witt will appear on The Quest radio show on October 22 to discuss Our Undiscovered Universe
Limited Tenders are invited for 1)Developer Powder Manual Qty: 30 Null 2)Fixer Powder Manual Qty: 30 Null 8)Null Qty: Null Null