cross section

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cross section

1. Maths a plane surface formed by cutting across a solid, esp perpendicular to its longest axis
2. a section cut off in this way
3. Physics a measure of the probability that a collision process will result in a particular reaction. It is expressed by the effective area that one participant presents as a target for the other

Cross Section

 

in hydraulics, the cross section of a liquid stream (in a pipeline, channel, or river) perpendicular to the direction of the flow velocity. If the liquid motion is continuously changing, the cross section is taken as flat and equal to the cross section area of the flow.

cross section

[′krȯs ‚sek·shən]
(geology)
A diagram or drawing that shows the downward projection of surficial geology along a vertical plane, for example, a portion of a stream bed drawn at right angles to the mean direction of the flow of the stream.
An actual exposure or cut which reveals geological features.
(graphic arts)
A diagram or drawing representing a cut at right angles to an axis.
(mapping)
A horizontal grid system that is laid out on the ground for determining contours, quantities of earthwork, and so on, by means of elevations of the grid points.
(mathematics)
The intersection of an n-dimensional geometric figure in some euclidean space with a lower dimensional hyperplane.
A right inverse for the projection of a fiber bundle.
(physics)
An area characteristic of a collision reaction between atomic or nuclear particles or systems, such that the number of reactions which occur equals the product of the number of target particles or systems and the number of incident particles or systems which would pass through this area if their velocities were perpendicular to it. Also known as collision cross section.

cross section

A representation of a building, or portion thereof, drawn as if it were cut vertically to show its interior; often taken at right angles to the longitudinal axis of the building.
References in periodicals archive ?
copper is used, take advantage of the fact that for the same cross-sectional area, thinner copper has more surface area and is therefore better at dissipating heat.
For quality control applications, cross-sectional scanning uses both proprietary, patented software called Spec.
SG, MOE, and MOR calibrations all gave strong relationships regardless of whether the cross-sectional or radial surface was very rough, rough, or sanded (Table 3).
Our observed increases in stipe breaking force, cross-sectional area, and material strength with increasing drag stand in contrast to previously published results.
In addition to the soil cross-sectional SWV model and the soil properties, the DSRA requires the determination of the water table and bedrock depths (when the bedrock depth is < 30 m).
First, the bounds for the cross section are much tighter than those for the fixed-effects estimates, clearly demonstrating the extraordinary impact of measurement error on "within" estimators: The cross-sectional estimates are much less biased by measurement error.
The copper ribbon was added to provide extra stability for the LTS specimen, and to provide a cooling surface, a total cross-sectional area, and a [J.
This cross-sectional study was conducted to investigate the association between serum 25 (OH) D levels and percent VBD among asymptomatic pre-menopausal women.
In three of the studies reported in this issue, researchers used a cross-sectional survey design to collect quantitative data (Fennessey, 2016; Vicensi et al.
14] tried to improve the BTB SB technique, creating a rectangular tunnel and bony part of the graft, neglecting the importance of the cross-sectional area of the classic BTB graft, with a width of 10 mm and the thickness of 3-5 mm, which ultimately depends on the individual patient's characteristics [15-17].
5] S/m) and thermal (~10 W/m K) conductivity [11], while having a circular or nearly circular cross-sectional shape.