first quadrant


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first quadrant

[¦fərst ′kwäd·rənt]
(mathematics)
The range of angles from 0 to 90°.
In a plane with a system of cartesian coordinates, the region in which the x and y coordinates are both positive.
References in periodicals archive ?
As the Hyperbolic Law in the Periodic Table has been proved for hyperbolas of the first quadrant, there arises an idea to apply it also to the second quadrant.
The [u.sub.r] results for the three single dipoles cases (radial, axial and tangential) and the three simultaneous dipoles (dilatation) (with source positions on the axis to 90[degrees] line) are best demonstrated in figure 11 using the CWD results for first quadrant signals (at 90 mm) with all the source centers off axis at 1 mm.
We first investigated the positivity and boundedness of the solution of deterministic model (1); we show that the solution of deterministic model (1) with the initial condition from the first quadrant is positive and bounded.
Spontaneous recovery was assessed using two different measurements during the test phase: a) reinforced quadrant preference; and, b) the first quadrant chosen.
In the proposed method, after launching a ray, firstly, it performs the intersection test between the ray and two surfaces (if the ray travels into first quadrant, then it will choose either left or bottom surface; for the second quadrant, it will choose either right or bottom surface; for the third quadrant, it will choose either top or right surface; and for the fourth quadrant, it will choose the top or left surface) of each object in a particular cell (stored in the Red-Black tree).
The [Kp.sub.i] are positive constants which make the update laws always happen in the first quadrant.
Caption: Construction of the Westlane Shopping Complex is proceeding at a brisk pace and the first quadrant of the main slab is expected to be cast before the builders' holiday starts.
To achieve this aim, measurements realized in the first quadrant were superimposed on measurements realized in the second quadrant and mean vignetting values were calculated for each target.
The other four elements from the first quadrant provide the basis for the main elements of the representation.
The inclusion of the club element to the representation on football's first quadrant, for the internet questionnaire group, corroborates that view: participants that are more interested in football or involved with the sport usually support a club, and their team is an important element on their representation, for it is through the club supporter group membership that they live in contact with the world of football.
The assemblage that enables imaging the posterior teeth for one quadrant will also enable imaging of the posterior teeth of the quadrant that is diagonally opposite the first quadrant. For example, the posterior XCP assemblage for the maxillary left posterior is also the same for the mandibular right posterior.
Thus the observer's intrinsic frame (-[phi][??]*, -[phi]c[phi][??]*) containing negative intrinsic relativistic mass, -[phi]m* = -[gamma] [phi][m.sup.*.sub.0], in the intrinsic affine space coordinate -pXt*, will automatically appear in the negative universe, upon the particle's intrinsic frame ([phi][??]', [phi]c[phi][??]') containing positive intrinsic rest mass pm0 of the particle in the first quadrant making transition into the second quadrant.