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 ?
Also of note, because we have access to SF-1 immunostaining, which was unavailable in the 2007 German Pituitary Tumor Registry report, (21) it is not surprising that we found both fewer null cell adenomas and more gonadotroph adenomas.
0] is relatively small, erroneously rejecting at least one of the true null hypotheses is nearly certain: for example, if [alpha] = 0.
c) the family F may evolve into a totally geodesic null hypersurface (H,[gamma], l) only if [[lambda].
A sample of the apparent TPOX null allele carriers who were identified in the way described above were re-profiled using the COfiler or Identifiler kits, which use different primers to those employed in the Powerplex 16 kit.
When you run the queries in the macro, zeros will be entered into the fields instead of nulls.
2, that due to single element failure the radiation pattern is damaged in terms of sidelobe levels, null depth and displacement of the nulls from their original position.
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).
If you are entering the data for this record and fail to ask the client for the County name they live in the data will then be considered missing and the record will be shown including a null.