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In geometry, a circular section is a circle on a quadric surface (such as an ellipsoid or hyperboloid). It is a special plane section of the quadric, as
Circular_section
Production model to minimise wastage and emissions
Circular economy (CE), or circularity, is a model of resource production and consumption that involves sharing, leasing, reusing, repairing, refurbishing
Circular_economy
Area bounded by a circular arc and a straight line
as a secant, and the section inside the disk as a chord. More formally, a circular segment is a plane region bounded by a circular arc (of less than π
Circular_segment
Cone with an elliptical base
is a conic section of the same type (ellipse, parabola, etc.), any plane section of an elliptic cone is a conic section (see Circular section#Elliptic cone)
Elliptic_cone
Polarization state
In electrodynamics, circular polarization of an electromagnetic wave is a polarization state in which, at each point, the electromagnetic field of the
Circular_polarization
Unit of area
of a wire with a circular cross section. As the definition of the unit contains π, it is easy to calculate area values in circular mils when the diameter
Circular_mil
Three-dimensional solid
section of a cylinder is a circle then the cylinder is a circular cylinder. In more generality, if a right section of a cylinder is a conic section (parabola
Cylinder
Relation used in the field of fluid dynamics
and (b) Poiseuille's law describing laminar fluid flow in straight, circular section pipes. The equation is given as: Δ P L = 150 μ Φ s 2 d p 2 ( 1 − ε
Kozeny–Carman_equation
Connecting unit for fluid transfer
bar). The name stems from the shape of the fitting, having a large circular section connected to a thinner pipe, generally similar to the shape of a banjo
Banjo_fitting
US Treasury Department rules publication
Circular 230 refers to Treasury Department Circular No. 230. This publication establishes the rules governing those who practice before the U.S. Internal
Circular_230
Power tool
rotary motion but are different from a circular saw. Circular saw may also be loosely used for the blade itself. Circular saws were invented in the late 18th
Circular_saw
Type of metal profile
structural section (HSS) is a type of metal profile with a hollow cross section. These profiles can be circular, square, or rectangular sections, although
Hollow_structural_section
Quadric surface with one axis of symmetry and no center of symmetry
paraboloid contains circles. This is also true in the general case (see Circular section). From the point of view of projective geometry, an elliptic paraboloid
Paraboloid
Game of throwing ring-shaped objects over a spike
central pin or spike and two recessed sections: an inner circular section called the dish and a circular outer section. Five points are awarded for a quoit
Quoits
Belt drive using circular section ropes
used for mechanical power transmission. Rope drives use a number of circular section ropes, rather than a single flat or V-belt. The first multiple rope
Rope_drive
Surface of revolution with a hole in the middle
are given by the following equations, where r is the radius of the circular section, and R is the radius of the overall shape. V = 2 π 2 r 2 R {\displaystyle
Toroid
Architectural feature on domes
for a round building with a roof and a circular wall. Another architectural meaning of drum is a circular section of a column shaft. In the earlier Byzantine
Tholobate
Metro line in New Taipei City
The Circular line (Chinese: 環狀線; also known as Yellow line) is a medium-capacity rapid transit line on the Taipei Metro. The first section of this line
Circular line (Taipei metropolitan area)
Circular_line_(Taipei_metropolitan_area)
Twenty-first letter in the Greek alphabet
erroneously typeset as Φ. This symbol is used to indicate the diameter of a circular section; for example, "⌀14" means the diameter of the circle is 14 units. The
Phi
Ring road around Central London
single continuous road, it was formed from component sections, some of which are named North Circular Road while others retain their separate names, e.g
North_Circular_Road
Self-referential description of meaning
A circular definition is a type of definition that uses the term(s) being defined as part of the description or assumes that the term(s) being described
Circular_definition
Type of unit of measurement of area
A circular measure was used in comparing circular cross-sections, e.g., of wires, etc. A circular unit of the ares is the area of the circle whose diameter
Circular_measure
Phyllosilicate mineral in the apophyllite group
means its indicatrix has a prolate sphenoid shape with a circular section, principal section, and one optic axis. Fluorapophyllite is popular among many
Fluorapophyllite-(K)
Story whose beginning can follow its end
A circular tale or a circular song is a tale or song that can be repeated endlessly, because the last element of the narrative introduces the repetition
Circular_tale
Major road in south London, England
North Circular. As a result, it is frequently congested. Originally planned as a new-build route across South London, construction of the first section of
South_Circular_Road,_London
is executed on a lathe with attachments which convert that plain circular section to variants of outline; these range from a simple series of cuts taken
Ornamental_turning
Characteristic of conic sections
much a conic section deviates from being circular. In particular: The eccentricity of a circle is 0. The eccentricity of a non-circular ellipse is between
Eccentricity_(mathematics)
Kofun period burial mound in Yamaguchi, Japan
tumulus in the Yamaguchi City area). The southern side of the circular posterior section of the mound has been leveled, and an archaeological excavation
Ōuchihikami_Kofun
Locality in New South Wales, Australia
Circular Quay (/kiː/ kee) is a harbour, former shipping port and now passenger terminal, public piazza, heritage area and transport node in Sydney, New
Circular_Quay
Ancient lighthouse in Egypt
tapering tiers: a lower square section with a central core; a middle octagonal section; and, at the top, a circular section. Al-Masudi wrote in the 10th
Lighthouse_of_Alexandria
Road in Sri Lanka
a highway in Colombo, Sri Lanka. It was opened in sections. The 29 km (18 mi) long outer circular road network links the Colombo - Matara Expressway
E02_expressway_(Sri_Lanka)
Mountain in the American state of Utah
mountain shaped like an "L". The south, an east–west section is a massif, with a circular section attached to the southeast. The highpoint of Swasey Mountain
Swasey_Mountain
Plane curved by the intersection of an earth ellipsoid and a plane
York to Paris example the results are: Circular section Geographical distance#Altitude correction Normal-section azimuth Equatorial paths are geodesics
Earth_section_paths
Mathematical operation
Circular convolution, also known as cyclic convolution, is a special case of periodic convolution, which is the convolution of two periodic functions that
Circular_convolution
Quadric surface that looks like a deformed sphere
This is also true, but less obvious, for triaxial ellipsoids (see Circular section). Given: Ellipsoid x2/a2 + y2/b2 + z2/c2 = 1 and the plane with
Ellipsoid
Air pistol
appears to have a fixed circular barrel protruding from a receiver that is also of roughly circular section. When fired, an inner section of the barrel, previously
Gat_air_pistol
Term used in botany
cross section that is circular, or like a distorted circle, with a single surface wrapping around it. That is usually contrasted with cross-sections that
Terete
Geometric shape
to the axis. If the cone is right circular the intersection of a plane with the lateral surface is a conic section. In general, however, the base may
Cone
Kofun period keyhole-shaped burial mound in Yamanashi, Japan
east-west. The posterior circular portion has a diameter of 48 meters and height of 7.5 meters. The anterior rectangular section has a width of 41 meters
Oka_Chōshizuka_Kofun
U.S. presidential executive order
The Specie Circular is a United States presidential executive order issued by President Andrew Jackson on July 11, 1836, pursuant to the Coinage Act of
Specie_Circular
1959 reconnaissance aircraft prototype by Tsybin
turbofans. The RSR was primarily of aluminium construction, with a long circular-section fuselage, which housed a pressurized cabin for the pilot together with
Tsybin_RSR
Political party in France
The French Section of the Workers' International (French: Section française de l'Internationale ouvrière, SFIO) was a major social democratic political
French Section of the Workers' International
French_Section_of_the_Workers'_International
Circular expressway in the Greater Tokyo area
the first section over 11 km (6.8 mi) in length, was opened to traffic on 22 December 2007. From 2010, the tunnel extended the Central Circular Route south
Central_Circular_Route
Curve from a cone intersecting a plane
is a right circular cone for the purpose of easy description, but this is not required; any double cone with some circular cross-section will suffice
Conic_section
Measure of how closely the shape of an object approaches that of a circle
non-circular shapes. Compactness measure of a shape Eccentricity (mathematics), how much a conic section (e.g., ellipse) deviates from being circular Flattening
Roundness
United States government circular
works. The last revision is dated May 10, 2004. This circular is divided into ten sections: This section outlines the principles and policies that must be
OMB_Circular_A-21
Kofun period burial mound in Sōja, Okayama, Japan
and one circular end, when viewed from above. The rectangular anterior section is at a higher elevation than the circular posterior section, and the
Ezaki_Kofun
Cannon breech
larger radius and a gap step occupying each circular section. A three step breech block screw's circular area would nominally be divided into quarters
Welin_breech_block
Cylinder whose generatrices are perpendicular to the bases
A right circular cylinder is a cylinder whose generatrices are perpendicular to the bases. Thus, in a right circular cylinder, the generatrix and the height
Right_circular_cylinder
by Apollonius the subcontrary sections. If one looks at the triangles formed by the diameters of the circular sections (both families) and the vertex
Antiparallel_lines
Unbounded quadric surface
In geometry, a hyperboloid of revolution, sometimes called a circular hyperboloid, is the surface generated by rotating a hyperbola around one of its principal
Hyperboloid
Portion of a disk enclosed by two radii and an arc
A circular sector, also known as circle sector or disk sector or simply a sector (symbol: ⌔), is the portion of a disk (a closed region bounded by a circle)
Circular_sector
Repeating pattern of swirling vortices
body with circle sections such as circular cylinders or spheres, one usually chooses the diameter; for an airfoil, a generic non-circular cylinder or a bluff
Kármán_vortex_street
Lighthouse 5 km from Dunbar Scotland
it was described as a tall tower, slightly tapered with a circular section having a circular lantern which has triangular panes and a domed roof. The keepers'
Barns_Ness_Lighthouse
Line on the Delhi Metro system
The Pink Line (Line 7) or Pink Circular Line is a line of the Delhi Metro, a rapid transit system in Delhi, India. It consists of 46 stations out of which
Pink_Line_(Delhi_Metro)
distortion, forming a standard parallel which has true scale. Circular section Circular segment Spherical cap Tangent space "Map projection - types and
Secant_plane
Complex of wharves in Australia
Circular Quay ferry wharf is a complex of wharves at Circular Quay, on Sydney Cove, that serves as the hub for the Sydney Harbour ferry network. It is
Circular_Quay_ferry_wharf
Equation in fluid dynamics
{\displaystyle D_{H}} , the hydraulic diameter of the pipe (for a pipe of circular section, this equals D; otherwise DH = 4A/P for a pipe of cross-sectional area
Darcy–Weisbach_equation
Three Kofun period burial mounds in Japan
section on the left, front circular section on the right) Mound (rear circular section on the left rear, front circular section on the right front) Group
Hodota_Kofun_Cluster
Super-midsize American business jet first flown in 2016
now-canceled Cessna Citation Columbus. Its fuselage cross-section (83.25-inch [211.5 cm] circular section) is the same as the Cessna Citation Latitude. The aircraft
Cessna_Citation_Longitude
early papers rely on different simplifications: the first considers a circular section and treats the intersection with various possible shapes. The second
Cone_tracing
Trigonometric function defined as secant minus one
\operatorname {vers} \theta =1-\cos \theta } , for designing and measuring circular sections of railroad track. It was adopted by surveyors and civil engineers
Exsecant
Method for calculating average values
In mathematics and statistics, a circular mean or angular mean is a mean designed for angles and similar cyclic quantities, such as times of day, and fractional
Circular_mean
Method of crop irrigation
to as crop circles, not to be confused with those formed by circular flattening of a section of a crop in a field). Most center-pivot systems were water-powered;
Center-pivot_irrigation
Record of engagements by British royals
The Court Circular is the official record that lists the engagements carried out by the monarch of the United Kingdom and the other Commonwealth realms;
Court_Circular
Measure of a channel flow efficiency
in non-circular tubes and channels. Using this term, one can calculate many things in the same way as for a round tube. When the cross-section is uniform
Hydraulic_diameter
French STOL transport aircraft with 4 turboprop engines, 1959
Br 941, but were to be mated to a new 3.1 m (10 ft 2.0 in) diameter circular section fuselage, with airline seating for 40 first/business class or up to
Bréguet_941
Estonian state decoration
design as the fifth main class, but the badge itself is backed in a circular section of silver. The ribbon is red coloured, and is attached to all classes
Order_of_the_White_Star
Railway line in Kolkata
Kolkata Circular Railway, also known as the Kolkata Chakra Rail (Bengali: কলকাতা চক্র রেল), is a 36.20 km (22.49 mi) long railway loop line operated by
Kolkata_Circular_Railway
Geometric property of a structural member
solid mechanics and structural engineering, section modulus is a geometric property of a given cross-section used in the design of beams or flexural members
Section_modulus
Species of flowering plant
and 50 cm tall and has variegated leaves. Its branched stems have a circular section towards the base and quadrangular towards the summit. They present
Alternanthera_bettzickiana
Species of jumping spider
the female has a heart-shaped epigyne that contains a spade-like or circular section and longer insemination ducts than Pachyballus mombasensis. A member
Pachyballus_miniscutulus
Series of anti-tank mines
a prominent circular section at one end that contains the clearing charge and Misnay–Schardin effect warhead, and a rectangular section that contains
HPD_series_of_mines
Twisting of an object due to an applied torque
square inch (psi). In a circular shaft, the shear stress is tangent to circles centred on the shaft axis. In non-circular cross-sections, twisting is accompanied
Torsion_(mechanics)
Topics referred to by the same term
Circle Line or Circular line may refer to: Baku suburban railway Baku Metro (partly in operation) Chittagong Circular Railway Line 2 (Beijing Subway) Line
Circle_Line
Seat of the Storting, the parliament of Norway
Stortingsbygningen is the way the plenary chamber is located in the semi-circular section in the front of the building, as opposed to the building's centre.
Storting_building
Mechanical, toroid gasket that seals an interface
seal for the pistons of power conveying cylinders." He describes "a circular section ring ... made of solid rubber or rubber composition", and explains
O-ring
Soviet transport aircraft
in-house designation for a projected airliner version with a pressurised circular section cabin accommodating up to 57 passengers. An-8 The initial production
Antonov_An-8
the two-photon absorption (TPA) cross-sections obtained using left circular polarized light and right circular polarized light (see Figure 1). Typically
Two-photon_circular_dichroism
Type of probability distribution
following sections show some relevant circular distributions. The von Mises distribution is a circular distribution which, like any other circular distribution
Circular_distribution
Type of cutting tool
with a drill to remove material and create holes, typically with a circular cross-section. Drill bits are available in various sizes and shapes, designed
Drill_bit
Optical filter device
linear polarizer section of the circular polarizer it would clearly pass through given its orientation. Now imagine the circularly polarized light which
Polarizer
Lighthouse on the Firth of Clyde, Scotland
as stores and the more recent having crow-stepped gables. The short circular-section tower has a corbelled walkway and triangular windows. The foghorns
Cloch
OMB Circular A-126, revised May 22, 1992, is a Government circular that introduces standards and policies to minimize the cost and improve the management
OMB_Circular_A-126
Lighthouse
and Landscape Design Awards. The lighthouse is composed of a short circular-section tower with a triangular-paned domed-top standard lantern. The buildings
Todhead_Lighthouse
Soviet prototype lightweight supersonic fighter
submitted for State acceptance trials in March 1955. The fighter had a circular-section semi-monocoque fuselage with a nose air intake. A range-only radar
Yakovlev_Yak-140
Railway station in Sydney, New South Wales, Australia
Circular Quay railway station is a heritage-listed elevated railway station that is located on the City Circle line, serving the Circular Quay precinct
Circular_Quay_railway_station
The Authors' Circular was a short-lived monthly publication of 16 pages running from January to April 1898. It was subtitled the Official Organ of the
The_Authors'_Circular
Expressway in the Tokyo area
of central Tokyo, the Inner Circular Route also serves as the origin of the radial routes of the Shuto Expressway. A section of the expressway is built
Inner_Circular_Route
Painting by William Holman Hunt
service" and duty. Richard, Stemp (2020). "The Mirror Crack'd". The semi-circular section beneath the vaulting is decorated as a stylised sky, with [...] a globe
The Lady of Shalott (William Holman Hunt)
The_Lady_of_Shalott_(William_Holman_Hunt)
Lamppost in Cambridge, UK
It stands on a square-section plinth with waterleaf decoration on the top edges. The base of the shaft of the circular section is encircled with four
Reality_Checkpoint
Isle of Man motorcycle road race
tubing used for the construction of the frame may be of a circular or non-circular section, and the outside diameter shall not exceed 101.6mm. Minimum
Sidecar_TT
French astronomer, mathematician, and engineer
Impériale, 1853). He is the eponym of Villarceau circles, which are two circular sections of a torus other than the two trivial ones. A short street in the
Yvon_Villarceau
In projective geometry, the circular points at infinity (also called cyclic points or isotropic points) are two special points at infinity in the complex
Circular_points_at_infinity
WWII British naval strike-fighter
an oval-shaped stressed-skin semi-monocoque, but forward it had a circular-section, tubular-steel frame that housed the 169-imperial-gallon (770 L; 203 US gal)
Blackburn_Firebrand
Extinct genus of mammal
resembled that of a typical goat or sheep. It horns were short, with a circular section at the base. The horns curved upwards and slightly back. Its dentition
Megalovis
Railway Gun
tension rods extended to the carriage's trail which rested against a circular section of rail. The gun was traversed by means of a gear that engaged pins
17 cm SK L/40 i.R.L. auf Eisenbahnwagen
17_cm_SK_L/40_i.R.L._auf_Eisenbahnwagen
Former entertainment venue in Berlin, Germany
part of the Park Kolonnaden ensemble, was given a semi-circular façade in homage to the round section of the building which had once stood there. Haus Vaterland
Haus_Vaterland
Ship hull appendage to modify propeller inflow
upstream of the propeller within the wake. It may be made of a single circular section duct directly ahead of the propeller, with fixed internal and/or external
Wake-equalising_duct
Unofficial symbol
to result in a design, as of 2015. Namık İsmail's proposed design A circular section of the red flag of Turkey containing the white crescent and star is
Emblems_of_Turkey
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