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Topics referred to by the same term
up torsion in Wiktionary, the free dictionary. Torsion may refer to: Torsion (mechanics), the twisting of an object due to an applied torque Torsion of
Torsion
Medical condition
Testicular torsion occurs when the spermatic cord (from which the testicle is suspended) twists, cutting off the blood supply to the testicle. The most
Testicular_torsion
Type of spring
A torsion spring is a spring that works by twisting its end along its axis; that is, a flexible elastic object that stores mechanical energy when it is
Torsion_spring
Vehicle suspension that uses a torsion bar
A torsion bar suspension, also known as a torsion spring suspension, is any vehicle suspension that uses a torsion bar as its main weight-bearing spring
Torsion_bar_suspension
Novel characteristic of larval gastropods
up torsion in Wiktionary, the free dictionary. Torsion is a gastropod synapomorphy which occurs in all gastropods during larval development. Torsion is
Torsion_(gastropod)
Topological invariant of manifolds that can distinguish homotopy-equivalent manifolds
In mathematics, Reidemeister torsion (or R-torsion, or Reidemeister–Franz torsion) is a topological invariant of manifolds introduced by Kurt Reidemeister
Analytic_torsion
Module over a ring
In algebra, a torsion-free module is a module over a ring such that zero is the only element annihilated by a regular element (non zero-divisor) of the
Torsion-free_module
In mathematics, a torsion sheaf is a sheaf of abelian groups F {\displaystyle {\mathcal {F}}} on a site for which, for every object U, the space of sections
Torsion_sheaf
Class of beam in structural engineering
A torsion box consists of two thin layers of material (skins) on either side of a lightweight core, usually a grid of beams. It is designed to resist
Torsion_box
Twisting of an object due to an applied torque
In solid mechanics, torsion is the twisting of an object caused by an applied torque. It may be described as an angular deformation, measured by the rotation
Torsion_(mechanics)
Type of dihedral angle
In stereochemistry, a torsion angle is defined as a particular example of a dihedral angle, describing the geometric relation of two parts of a molecule
Torsion_angle
Twisting of an ovary such that blood flow is decreased
Ovarian torsion (OT) or adnexal torsion is an abnormal condition where an ovary twists on its attachment to other structures, such that blood flow is
Ovarian_torsion
Penile torsion is a fairly common congenital condition with male infants. It occurs up to about 1 in 80 newborn males. With this condition, the penis
Penile_torsion
Geometrical property of a bar's cross-section
The torsion constant or torsion coefficient is a geometrical property of a bar's cross-section. It is involved in the relationship between angle of twist
Torsion_constant
Topics referred to by the same term
domain where zero is the only torsion element Torsion-free abelian group, an abelian group which is a torsion-free group Torsion-free rank, the cardinality
Torsion-free
Conjecture in number theory
theory, the torsion conjecture or uniform boundedness conjecture for torsion points for abelian varieties states that the order of the torsion group of an
Torsion_conjecture
Topics referred to by the same term
Torsion field can refer to: A torsion tensor in differential geometry. The field used in Einstein–Cartan theory and other alternatives to general relativity
Torsion_field
Clock that uses a torsion pendulum to keep time
Kundo reverts here. For other use, see Kundo (disambiguation) A torsion pendulum clock, more commonly known as an anniversary clock or 400-day clock,
Torsion_pendulum_clock
torsion abelian group is an abelian group in which every element has finite order. For example, the torsion subgroup of an abelian group is a torsion
Torsion_abelian_group
Zero divisors in a module
ring theory, a torsion element is an element of a module that yields zero when multiplied by some non-zero-divisor of the ring. The torsion submodule of
Torsion_(algebra)
Object in differential geometry
In differential geometry, the torsion tensor is a tensor that is associated to any affine connection. The torsion tensor is a bilinear map of two input
Torsion_tensor
Experiment measuring the force of gravity (1797–1798)
sometime before 1783 by the English geologist John Michell, who constructed a torsion balance apparatus for it. However, Michell died in 1793 without completing
Cavendish_experiment
Mathematical measure of how much a curve twists
kinematics, the torsion of a curve measures how sharply it is twisting out of the osculating plane. Taken together, the curvature and the torsion of a space
Torsion_of_a_curve
Abelian group with no non-trivial torsion elements
specifically in abstract algebra, a torsion-free abelian group is an abelian group which has no non-trivial torsion elements; that is, a group in which
Torsion-free_abelian_group
Type of artillery relying on a twisting force to launch projectiles
A torsion siege engine is a type of siege engine that utilizes torsion to launch projectiles. They were initially developed by the ancient Macedonians
Torsion_siege_engine
Unsupported hypothesis about effects of quantum spin
A torsion field (also called axion field, spin field, spinor field, and microlepton field) is a reoccurring feature of many pseudoscientific proposals
Torsion_field_(pseudoscience)
Oscillation of a spinning object along its rotation axis
Torsional vibration is the angular vibration of an object—commonly a shaft—along its axis of rotation. Torsional vibration is often a concern in power
Torsional_vibration
Subgroup of an abelian group consisting of all elements of finite order
In the theory of abelian groups, the torsion subgroup A T {\displaystyle A_{T}} of an abelian group A {\displaystyle A} is the subgroup of A {\displaystyle
Torsion_subgroup
Fountain by Naum Gabo in London
Revolving Torsion is a 1972–73 kinetic sculpture and fountain by the Russian-born Constructivist artist Naum Gabo. It was commissioned for the Tate Gallery
Revolving_Torsion
Hereditary disease
Torsion dystonia, also known as dystonia musculorum deformans, is a disease characterized by painful muscle contractions resulting in uncontrollable distortions
Torsion_dystonia
Topics referred to by the same term
Torsional strain may refer to: Deformation (mechanics) Strain (chemistry)#Torsional strain This disambiguation page lists articles associated with the
Torsional_strain
Historical misconception
The torsion mangonel myth, or simply the myth of the mangonel, is the belief that the mangonel (or traction trebuchet) was a torsion siege engine which
Torsion_mangonel_myth
Topics referred to by the same term
Gonadal torsion refers to torsion of the gonads. It may refer to: Testicular torsion Ovarian torsion This disambiguation page lists articles associated
Gonadal_torsion
Large door on a garage that accommodates vehicles entering and exiting
of the door may be 400 lb (180 kg) or more, but is balanced by either a torsion spring system or a pair of extension springs, to make the door seem light
Garage_door
Type of automobile suspension
The twist-beam rear suspension (also torsion-beam axle, deformable torsion beam, or compound crank) is a type of automobile suspension based on a large
Twist-beam_rear_suspension
Medical sign for testicular pain
epididymitis or from testicular torsion. Although elevation of the scrotum when differentiating epididymitis from testicular torsion is of clinical value, Prehn's
Prehn's_sign
Roman catapult-style torsion siege engine
The onager (UK: /ˈɒnədʒə/, /ˈɒnəɡə/; US: /ˈɑːnədʒər/) was a Roman torsion-powered siege engine. It is a type of catapult commonly depicted with a bowl
Onager_(weapon)
Number of elements in a subset of a commutative group
In mathematics, the rank, Prüfer rank, or torsion-free rank of an abelian group A is the cardinality of a maximal linearly independent subset. The rank
Rank_of_an_abelian_group
Topics referred to by the same term
Digging bar, a tool Rebar, steel reinforcement, used in construction Torsion bar or torsion spring, a device that stores mechanical energy through twisting
Bar
Neurological movement disorder
PH, Davis MB, Ferraris A, et al. (March 2001). "DYT13, a novel primary torsion dystonia locus, maps to chromosome 1p36.13--36.32 in an Italian family
Dystonia
Commutative group (mathematics)
T(A)} is its torsion subgroup, then the factor group A / T ( A ) {\displaystyle A/T(A)} is torsion-free. However, in general the torsion subgroup is not
Abelian_group
Type of weight scale
diseases. Alternative types of torsional balances include: Quartz fibre torsion ultramicrobalance Torsion ultramicrobalance Torsion nanobalance Ultramicrobalance
Microbalance
Medical condition
problems to emergency conditions such as Fournier gangrene and testicular torsion. The diagnostic approach involves making sure no serious conditions are
Testicular_pain
Part of the testis
serious differential diagnosis of testicular torsion, a surgical exploration of the scrotum is warranted. Torsion of the appendix of testis occurs at ages
Appendix_of_testis
Cosmological model in which the observable universe is the interior of a black hole
extremely high densities, much greater than the density of nuclear matter, torsion or another mechanism limiting curvature might prevent the matter from compressing
Black_hole_cosmology
Topics referred to by the same term
Hahn–Banach separation theorem in functional analysis Mazur's torsion theorem, a proof of the torsion conjecture for elliptic curves over the rationals Mazur's
Mazur's_theorem
Left-right asymmetry of the spine's curvature
Scoliosis (pl.: scolioses) is a medical condition in which the spine has an irregular curve in the coronal plane, associated with a rotational component
Scoliosis
Group in which each element has finite order
In group theory, a branch of mathematics, a torsion group or a periodic group is a group in which every element has finite order. The exponent of such
Torsion_group
Classical theory of gravitation
removing the zero torsion constraint from the Palatini action, which results in the additional set of equations for spin and torsion, as well as the addition
Einstein–Cartan_theory
Mechanical device that stores energy
spring undergoes torsion. The spring characteristics therefore depend on the shear modulus. A coil spring may also be used as a torsion spring: in this
Coil_spring
finite CW-complexes being a simple homotopy equivalence is its Whitehead torsion τ ( f ) {\displaystyle \tau (f)} which is an element in the Whitehead group
Whitehead_torsion
Surgery to fix a testicle into the scrotum
correct an undescended testicle, it is also used to resolve testicular torsion. Undescended testicles affect 1% of males and present bilaterally in 10%
Orchiopexy
Human reflex affecting the testicles
of cryptorchidism. The cremasteric reflex may be absent with testicular torsion, upper and lower motor neuron disorders, as well as a spine injury of L1-L2
Cremasteric_reflex
Formulas in differential geometry
and τ is the torsion of the space curve. (Intuitively, curvature measures the failure of a curve to be a straight line, while torsion measures the failure
Frenet–Serret_formulas
Object in differential geometry
differential geometry is the difference between a connection with and without torsion in it. It commonly appears in the study of spin connections. Thus, for
Contorsion_tensor
Medical condition affecting the feet
excessive anteversion (femoral head is more than 15° from the angle of torsion) resulting in the twisting of the thigh bone when the front part of a person's
Pigeon_toe
Roughly, the number of k-dimensional holes on a topological surface
finite components of the homology groups are their torsion subgroups, and they are denoted by torsion coefficients. The term "Betti number" was coined by
Betti_number
Metal processing method
torsion (HPT) is a severe plastic deformation technique used to refine the microstructure of materials by applying both high pressure and torsional strain
High-pressure_torsion
Manipulating the components of a lock to unlock it without a key
above the shear line allowing you to open the lock. The tension wrench or torsion wrench, is generally used when picking a pin tumbler or wafer lock. It
Lock_picking
Interruption in blood supply to the greater omentum
Omental infarction, or omental torsion, is an acute vascular disorder which compromises tissue of the greater omentum—the largest peritoneal fold in the
Omental_infarction
Medieval artillery device
A springald, or espringal, was a torsion siege engine device for throwing bolts in medieval times. It is depicted in a diagram in an 11th-century Byzantine
Springald
Medical condition in dogs
volvulus (GDV), also known as gastric dilation, twisted stomach, or gastric torsion, is a medical condition that affects dogs and rarely cats and guinea pigs
Gastric_dilatation_volvulus
Resistance to deformation in response to force
ratio of applied shear force to shear deformation torsional stiffness - the ratio of applied torsion moment to the angle of twist The elastic modulus of
Stiffness
Space curve that winds around a line
e. one with constant radius) has constant band curvature and constant torsion. The slope of a circular helix is commonly defined as the ratio of the
Helix
Tool used to provide grip and mechanical advantage
A wrench or spanner is a tool used to provide grip and mechanical advantage in applying torque to turn objects—usually rotary fasteners, such as nuts and
Wrench
American medical television drama series
ovary syndrome, whose worsening pain leads to the discovery of ovarian torsion requiring surgery. McKay has a tender moment with Roxie. Abbot returns
The_Pitt
Topics referred to by the same term
Serre twist on a graded module or projective scheme Twist (mechanics), the torsion of an object Twist (differential geometry), a geometric quantity associated
Twist
Construction in homological algebra
The name comes from a relation between the first Tor group Tor1 and the torsion subgroup of an abelian group. In the special case of abelian groups, Tor
Tor_functor
Ancient ranged weapon
Greek weapons, it relied upon different mechanics, using two levers with torsion springs instead of a tension prod (the bow part of a modern crossbow).
Ballista
Type of bone fracture
A spiral fracture (a.k.a. torsion fracture) is a bone fracture occurring when torque (a rotating force) is applied along the axis of a bone. Spiral fractures
Spiral_fracture
Angle between two planes in space
Martin (7 Dec 1998). "New formulation for derivatives of torsion angles and improper torsion angles in molecular mechanics: Elimination of singularities"
Dihedral_angle
PREDITOR (PREDIction of TORsion angles) is a freely available web-server for the prediction of protein torsion angles from chemical shifts. For many years
PREDITOR
Surgical removal of one or both testicles
for advanced prostate cancer to remove damaged testes after testicular torsion. after a trauma or complex rupture of the tunica albuginea. as a treatment
Orchiectomy
Human-powered trebuchet
men to function, it was also less complex and faster to reload than the torsion-powered onager which it replaced in early Medieval Europe. It was replaced
Mangonel
Connects homology and cohomology groups for oriented closed manifolds
boundaryless, and orientable, let τ H i M {\displaystyle \tau H_{i}M} denote the torsion subgroup of H i M {\displaystyle H_{i}M} and let f H i M = H i M / τ H
Poincaré_duality
Mechanical phenomenon where twisting forces cause sudden structural deformation
Torsional instability is a mechanical phenomenon where a structural element subjected to twisting (torsional) forces undergoes sudden deformation or failure
Torsional_instability
American comedy-drama anthology television series
club's billionaire new owner. Ashley is diagnosed with an ovarian cyst and torsion after suffering abdominal pain at work. She tells Austin, who suggests
Beef_(TV_series)
German-born theoretical physicist (1879–1955)
needed to be generalized to include an antisymmetric part, called the torsion. This modification was made by Einstein and Cartan in the 1920s. In general
Albert_Einstein
Polish physicist (born 1975)
antisymmetric part, the torsion tensor, must be a variable in Hamilton's principle of stationary action which gives the field equations. Torsion gives the correct
Nikodem_Popławski
Sculpture by Richard Serra
(Torsión espiral (cerrada abierta cerrada abierta cerrada) (2003–04); Torqued Ellipse (Torsión elíptica) (2003–04); Double Torqued Ellipse (Torsión elíptica
The_Matter_of_Time
Roman ballista-like torsion siege engine
The scorpio or scorpion was a type of Roman torsion siege engine and field artillery piece. It was described in detail by the early-imperial Roman architect
Scorpio_(weapon)
1955 racing car
with the streamlined Type Monza Formula one car. To reduce crankshaft torsion, power takeoff was from the centre of the engine via a gear rather than
Mercedes-Benz_300_SLR
Physical constant for the strength of gravity induced by a mass
for G implicitly, using a torsion balance invented by the geologist Rev. John Michell (1753). He used a horizontal torsion beam with lead balls whose
Gravitational_constant
Element on a suspension machine
them to the spring or shock absorber. Torsion bar suspension commonly does this, with the outboard end of the torsion bar attached to the inboard bearing
Control_arm
Reduction in the size and function of the testicles
sexually transmitted infections, COVID-19, orchitis, varicoceles, or torsion of the testes. Shrinkage of the testicles is common with advanced age,
Testicular_atrophy
Vibration damping system in an engine
drive) end of the crankshaft of an internal combustion engine to counter torsional and resonance vibrations from the crankshaft. This device must be an interference
Harmonic_damper
Gravitational-wave detector
A torsion-bar antenna (TOBA) is a novel scheme for a gravitational wave detector, proposed by M. Ando, et al. in 2010. The proposed design is composed
Torsion-bar_antenna
Various molecular structures formed only by rotation about single bonds
either torsional or dihedral angles) between substituents around a single bond: a torsion angle between 0° and ±90° is called syn (s) a torsion angle between
Rotamer
Structure group sub-bundle on a tangent frame bundle
the torsion of the G-structure. A G-structure is said to be torsion-free if its torsion vanishes. This happens precisely when Q admits a torsion-free
G-structure_on_a_manifold
Unique existence of the Levi-Civita connection
pseudo-Riemannian manifold) there is a unique affine connection that is torsion-free and metric-compatible, called the Levi-Civita connection or (pseudo-)Riemannian
Fundamental theorem of Riemannian geometry
Fundamental_theorem_of_Riemannian_geometry
Bilateral functional ovarian cyst
Due to the enlargement of the ovaries, there is an increased risk for torsion. Surgical intervention may be required to remove ruptured or infarcted
Theca_lutein_cyst
Array of numbers describing a metric connection
given metric tensor; however, there is a unique connection that is free of torsion, the Levi-Civita connection. It is common in physics and general relativity
Christoffel_symbols
Hungarian physicist (1848–1919)
his work on gravitation and surface tension, and the invention of the torsion pendulum. In addition to Eötvös Loránd University and the Eötvös Loránd
Loránd_Eötvös
Type of germ cell tumor
present as a painless lump. Complications may include ovarian torsion, testicular torsion, or hydrops fetalis. They are a type of germ cell tumor (a tumor
Teratoma
Construction element
capacity in the transverse direction and is also inefficient in carrying torsion, for which hollow structural sections are often preferred. In 1849, the
I-beam
Construct allowing differentiation of tangent vector fields of manifolds
bundle. The main invariants of an affine connection are its torsion and its curvature. The torsion measures how closely the Lie bracket of vector fields can
Affine_connection
Regular 3-D curves are shape and size determined by their curvature and torsion
curvature and torsion. A curve can be described, and thereby defined, by a pair of scalar fields: curvature κ {\displaystyle \kappa } and torsion τ {\displaystyle
Fundamental_theorem_of_curves
Series of armored fighting vehicles designed by the United States
have 3 inch gun and torsion bar suspension but completed by Fisher with 76mm gun and designated T20E3. T20E3 76 mm gun and torsion bar suspension The T20
T20_medium_tank
Compact car built from 1961 to 1973
(with a backbone chassis integrated into the car's floorpan), as well as torsion bar front and rear suspension. Despite using the Beetle's 2.40 m (94 in)
Volkswagen_Type_3
Hypothesis that inertial and gravitational masses are equivalent
precision measurements. Loránd Eötvös's approach in 1908 used a very sensitive torsion balance to give precision approaching 1 in a billion. Modern experiments
Equivalence_principle
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