cross section
Let an agent explain cross sections in geometry and engineering, relay their use in design and analysis, explain the physics sense of scattering and radar cross section, and separate the concept from unrelated aliases.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent explain cross sections in geometry and engineering, relay their use in design and analysis, explain the physics sense of scattering and radar cross section, and separate the concept from unrelated aliases.
In geometry and engineering, the shape or surface obtained by cutting a solid body with a plane, such as the cross section of a beam, pipe, river channel or road, used to show internal structure and to compute properties such as area and second moment of area; the term extends to physics, where a scattering or radar cross section measures the effective area of interaction, and the registry entry also gathers unrelated aliases such as video frames.
What it is for: Showing and analysing the internal shape of bodies; measuring interaction in physics.
It can be explain the geometric concept; relay engineering uses and properties; explain the physics sense; separate unrelated aliases.
Distinguishing features
Plane cut
Reveals internal structure
Basis for section properties
Physics analogue as effective area
What it looks like
A drawing or view of a body as if cut by a plane, showing internal shape.
How it is recognised
Shape from a plane cut through a body
Engineering sections of beams, channels and roads
A longitudinal section, a plan and an elevation are other views; a video frame is unrelated
Related models
is a kind of - in registry terms, of a plane and a solid
is a kind of - in registry terms
is used to compute - in structural design
is related to - the physics sense
In practice
Families and kinds
cross sections of structural members
river and channel cross sections
road and railway cross sections
anatomical and geological cross sections
scattering and radar cross sections in physics
average and reference sections in survey and design
Standards and regulation
Technical drawing standards such as ISO 128 for sections
Structural design codes using section properties
Survey standards for channel and road sections
Failure modes and hazards
Confusing cross sections with other views
Sense confusion between geometry and physics
Errors in section property calculation
Also called
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Concept What a cross section is.
Definition.
Definition
Definition and views.
Definition
Definition.
- What is a cross section, and how does it differ from other sections and views? definition
- Is the question about the geometric, engineering or physics sense? boundary
Drawing
Drawing conventions.
Drawing
Drawing.
- How are cross sections drawn and labelled in technical drawing? provenance
- Which entry fits technical drawing? action
Compute Section properties.
Computation.
Properties
Properties.
Properties
Properties.
- How are area, centroid and second moment of area computed from a cross section? action
- What are the values for the section in question? measurement
Shapes
Standard shapes.
Shapes
Shapes.
- What standard section shapes are used in construction, and where are their properties tabulated? provenance
- Which references are standard? provenance
Fields Uses across fields.
Application.
Civil
Rivers and roads.
Civil
Civil.
- How are channel and road cross sections surveyed and used in design? provenance
- Which entry fits hydraulic engineering? action
Science
Anatomy and geology.
Science
Science.
- How are cross sections used in anatomy, geology and imaging? provenance
- Which entry fits the specific field? action
Physics The physics sense.
Science.
Scattering
Scattering cross section.
Scattering
Scattering.
- What is a scattering cross section, and how is it measured? provenance
- Which entry fits cross section in physics? action
Radar
Radar cross section.
Radar
Radar.
- What is radar cross section, and how does it depend on shape and material, in general terms? provenance
- Which sources are cited? provenance
What the second pass must settle
- Should radar cross section be a separate primary entry?
- How should drawing standards be linked?
- The registry entry has merged aliases for unrelated concepts such as video frames; should they be removed?