TERMIUM Plus®
The Government of Canada’s terminology and linguistic data bank.
ROTATION SYMMETRY [19 records]
Record 1 - internal organization data 2016-11-18
Record 1, English
Record 1, Subject field(s)
- Casting and Patternmaking (Metal Processing)
Record 1, Main entry term, English
- centrifugal casting
1, record 1, English, centrifugal%20casting
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, Textual support number: 1 DEF
A casting technique whereby molten metal is thrust into a mold by centrifugal force. 2, record 1, English, - centrifugal%20casting
Record number: 1, Textual support number: 1 CONT
The inertia forces of rotation distribute the molten metal into the mold cavities during the centrifugal casting, of which there are three categories : true centrifugal casting, semi-centrifugal casting, and centrifuging. The first two processes produce hollow cylindrical shapes and parts with rotational symmetry, respectively. In the third process the mold cavities are spun at a certain radius from the axis of rotation; the centrifugal force thus increases the pressure in the mold cavity. 3, record 1, English, - centrifugal%20casting
Record number: 1, Textual support number: 1 OBS
The most common method is by means of a spring-driven arm supporting a crucible and mold flask. 2, record 1, English, - centrifugal%20casting
Record 1, French
Record 1, Domaine(s)
- Moulage et modelage des métaux
Record 1, Main entry term, French
- moulage par centrifugation
1, record 1, French, moulage%20par%20centrifugation
correct, masculine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
- coulée par centrifugation 2, record 1, French, coul%C3%A9e%20par%20centrifugation
correct, feminine noun
- moulage centrifuge 3, record 1, French, moulage%20centrifuge
correct, masculine noun
- coulée centrifuge 4, record 1, French, coul%C3%A9e%20centrifuge
correct, feminine noun
Record 1, Textual support, French
Record 1, Spanish
Record 1, Campo(s) temático(s)
- Colada y modelaje de metales
Record 1, Main entry term, Spanish
- fundición centrífuga
1, record 1, Spanish, fundici%C3%B3n%20centr%C3%ADfuga
correct, feminine noun
Record 1, Abbreviations, Spanish
Record 1, Synonyms, Spanish
- fundición por colada centrífuga 1, record 1, Spanish, fundici%C3%B3n%20por%20colada%20centr%C3%ADfuga
correct, feminine noun
- moldeo por centrifugación 2, record 1, Spanish, moldeo%20por%20centrifugaci%C3%B3n
correct, masculine noun
- colada centrífuga 1, record 1, Spanish, colada%20centr%C3%ADfuga
correct, feminine noun
Record 1, Textual support, Spanish
Record number: 1, Textual support number: 1 DEF
[Proceso que] consiste en verter el material fundido en un molde (generalmente cilíndrico), donde la fuerza centrífuga hará su trabajo haciendo que el material fundido se acomode o tome la forma de las paredes del molde, teniendo así un acabado más uniforme y más denso que en otros tipos de coladas. 1, record 1, Spanish, - fundici%C3%B3n%20centr%C3%ADfuga
Record number: 1, Textual support number: 1 CONT
La fundición por colada centrífuga es un proceso que se utiliza para producir piezas cilíndricas simétricas respecto a un eje. [...] Como su nombre lo indica, este proceso utiliza las fuerzas de inercia (causadas por un movimiento de rotación) para distribuir el metal fundido en las cavidades del molde. [...] La colada centrífuga se clasifica ya sea por la configuración del proceso, es decir, colada centrífuga horizontal o colada centrífuga vertical y por el método utilizado en dicho proceso, los cuales son tres: centrífugo real, semi-centrífugo y centrífugo. 1, record 1, Spanish, - fundici%C3%B3n%20centr%C3%ADfuga
Record number: 1, Textual support number: 1 PHR
colada centrífuga horizontal, colada centrífuga vertical 1, record 1, Spanish, - fundici%C3%B3n%20centr%C3%ADfuga
Record 2 - internal organization data 2012-02-15
Record 2, English
Record 2, Subject field(s)
- Joining Elements (Mechanical Components)
Record 2, Main entry term, English
- screw axis 1, record 2, English, screw%20axis
Record 2, Abbreviations, English
Record 2, Synonyms, English
- screw-axis 2, record 2, English, screw%2Daxis
Record 2, Textual support, English
Record number: 2, Textual support number: 1 OBS
A type of symmetry element possessed by certain space groups, in which the lattice is unaltered after a rotation about the axis, and a simultaneous translation along it. 1, record 2, English, - screw%20axis
Record 2, French
Record 2, Domaine(s)
- Éléments d'assemblage (Composants mécaniques)
Record 2, Main entry term, French
- axe de rotation avec translation
1, record 2, French, axe%20de%20rotation%20avec%20translation
masculine noun
Record 2, Abbreviations, French
Record 2, Synonyms, French
- vis-axe 2, record 2, French, vis%2Daxe
masculine noun
Record 2, Textual support, French
Record 2, Spanish
Record 2, Textual support, Spanish
Record 3 - internal organization data 2011-08-05
Record 3, English
Record 3, Subject field(s)
- Chemistry
Record 3, Main entry term, English
- optical activity
1, record 3, English, optical%20activity
correct
Record 3, Abbreviations, English
Record 3, Synonyms, English
Record 3, Textual support, English
Record number: 3, Textual support number: 1 CONT
[Optical isomers] take their name from their effect of rotating the plane of polarization of a beam of polarized light that is directed through them : one member of each pair causes rotation in one direction, the other in the opposite direction. This phenomenon, called optical activity, arises from any of several kinds of imbalance in the three-dimensional structure of the molecule that cause it to have no point, line, or plane of symmetry. 2, record 3, English, - optical%20activity
Record 3, French
Record 3, Domaine(s)
- Chimie
Record 3, Main entry term, French
- activité optique
1, record 3, French, activit%C3%A9%20optique
correct, feminine noun
Record 3, Abbreviations, French
Record 3, Synonyms, French
Record 3, Textual support, French
Record number: 3, Textual support number: 1 DEF
Propriété qu'a une entité chimique ou physique chirale de faire tourner le plan de polarisation d'un faisceau de lumière polarisée plane. 2, record 3, French, - activit%C3%A9%20optique
Record number: 3, Textual support number: 1 CONT
On connaît un grand nombre de substances naturelles qui ne sont pas superposables à leur image dans un miroir et sont douées d'un pouvoir rotatoire dont le signe a justement une telle signification. Ces substances sont capables de faire tourner le plan de polarisation d'une lumière polarisée rectilignement soit vers la droite [...] soit vers la gauche [...] Elles sont douées d'activité optique [...] 3, record 3, French, - activit%C3%A9%20optique
Record number: 3, Textual support number: 1 OBS
Cette propriété se manifeste aussi par la dispersion rotatoire, le dichroïsme circulaire et la polarisation circulaire d'émission. 2, record 3, French, - activit%C3%A9%20optique
Record number: 3, Textual support number: 2 OBS
activité optique : terme et définition publiés au Journal officiel de la République française le 18 avril 2001. 4, record 3, French, - activit%C3%A9%20optique
Record 3, Spanish
Record 3, Campo(s) temático(s)
- Química
Record 3, Main entry term, Spanish
- actividad óptica
1, record 3, Spanish, actividad%20%C3%B3ptica
correct, feminine noun
Record 3, Abbreviations, Spanish
Record 3, Synonyms, Spanish
Record 3, Textual support, Spanish
Record number: 3, Textual support number: 1 DEF
Poder rotatorio de algunas sustancias sobre la luz polarizada. 1, record 3, Spanish, - actividad%20%C3%B3ptica
Record 4 - internal organization data 2003-11-26
Record 4, English
Record 4, Subject field(s)
- Mineralogy
Record 4, Main entry term, English
- symmetry axis
1, record 4, English, symmetry%20axis
correct
Record 4, Abbreviations, English
Record 4, Synonyms, English
- axis of symmetry 2, record 4, English, axis%20of%20symmetry
correct
- rotation axis 1, record 4, English, rotation%20axis
correct
- symmetry axis of rotation 1, record 4, English, symmetry%20axis%20of%20rotation
correct
Record 4, Textual support, English
Record number: 4, Textual support number: 1 DEF
In a crystal, an imaginary line about which the crystal may be rotated, during which there may be two, three, four, or six repetitions of its appearance (lines, angles, or faces); it is one of the symmetry elements. 1, record 4, English, - symmetry%20axis
Record 4, French
Record 4, Domaine(s)
- Minéralogie
Record 4, Main entry term, French
- axe de symétrie
1, record 4, French, axe%20de%20sym%C3%A9trie
correct, masculine noun
Record 4, Abbreviations, French
Record 4, Synonyms, French
Record 4, Textual support, French
Record number: 4, Textual support number: 1 CONT
Un axe de symétrie est une ligne telle une rotation du cristal autour de cette ligne, d'un angle défini, amène une superposition complète avec la figure primitive: si la rotation est de 180 degrés, l'axe est dit d'ordre 2. Il est d'ordre 4 pour une rotation de 90 degrés, d'ordre 6 pour une rotation de 60 degrés. 2, record 4, French, - axe%20de%20sym%C3%A9trie
Record 4, Spanish
Record 4, Campo(s) temático(s)
- Mineralogía
Record 4, Main entry term, Spanish
- eje de simetría
1, record 4, Spanish, eje%20de%20simetr%C3%ADa
correct, masculine noun
Record 4, Abbreviations, Spanish
Record 4, Synonyms, Spanish
Record 4, Textual support, Spanish
Record number: 4, Textual support number: 1 DEF
[Eje] que, adoptado para hacer girar un cristal sobre sí mismo, permite apreciar el número de simetrías que presenta en el curso de una vuelta. 1, record 4, Spanish, - eje%20de%20simetr%C3%ADa
Record 5 - internal organization data 2003-06-30
Record 5, English
Record 5, Subject field(s)
- Industrial Techniques and Processes
- Engineering Tests and Reliability
- Spacecraft
Record 5, Main entry term, English
- axisymmetric finite element
1, record 5, English, axisymmetric%20finite%20element
correct
Record 5, Abbreviations, English
Record 5, Synonyms, English
Record 5, Textual support, English
Record number: 5, Textual support number: 1 CONT
The x coordinates in an axisymmetric finite element mesh must, therefore, all be greater or equal to zero. 2, record 5, English, - axisymmetric%20finite%20element
Record number: 5, Textual support number: 1 OBS
An axisymmetric analysis can be used to simulate three-dimensional problems with symmetry about a vertical axis of rotation. The problem is defined in two dimensions but for analysis it is as if the section is rotated about a vertical central axis. 2, record 5, English, - axisymmetric%20finite%20element
Record 5, French
Record 5, Domaine(s)
- Techniques industrielles
- Fiabilité, contrôle et essais (Ingénierie)
- Engins spatiaux
Record 5, Main entry term, French
- élément fini axisymétrique
1, record 5, French, %C3%A9l%C3%A9ment%20fini%20axisym%C3%A9trique
masculine noun
Record 5, Abbreviations, French
Record 5, Synonyms, French
Record 5, Textual support, French
Record 5, Spanish
Record 5, Textual support, Spanish
Record 6 - internal organization data 2003-03-25
Record 6, English
Record 6, Subject field(s)
- Plane Geometry
- Mineralogy
Record 6, Main entry term, English
- -fold
1, record 6, English, %2Dfold
correct, suffix
Record 6, Abbreviations, English
Record 6, Synonyms, English
Record 6, Textual support, English
Record number: 6, Textual support number: 1 DEF
(suffix) Multiplied by ... 2, record 6, English, - %2Dfold
Record number: 6, Textual support number: 1 CONT
A twelvefold increase ... threefold aspect of a problem ... 2, record 6, English, - %2Dfold
Record number: 6, Textual support number: 2 CONT
symmetry : In general, a figure or expression is said to be symmetric if parts of it may be interchanged without changing the whole.... A right circular cone has an axis of symmetry. A geometric figure has n-fold rotational symmetry about an axis if a rotation of 360°/n is a symmetry of the figure. Thus an axis of symmetry can be a rotational axis. For example, an axis through the centre of a square perpendicular to the plane is a 4-fold axis since a rotation of 360°/4 produces an identical figure; a diagonal is a 2-fold axis. 3, record 6, English, - %2Dfold
Record number: 6, Textual support number: 3 CONT
The cube shows rotational symmetry with respect to 3 axes, 2-fold with respect to the center of an edge, 3-fold with respect to a vertex, 4-fold with respect to a face. 4, record 6, English, - %2Dfold
Record 6, Key term(s)
- fold
Record 6, French
Record 6, Domaine(s)
- Géométrie plane
- Minéralogie
Record 6, Main entry term, French
- d'ordre
1, record 6, French, d%27ordre
correct
Record 6, Abbreviations, French
Record 6, Synonyms, French
Record 6, Textual support, French
Record number: 6, Textual support number: 1 CONT
Système cubique : axes de rotation d'ordre 4 [...]; axes de rotation d'ordre 3 [...]; axes de rotation d'ordre 2 [...] 2, record 6, French, - d%27ordre
Record number: 6, Textual support number: 2 CONT
D. Schechtman et ses collaborateurs [...] ont obtenu un diagramme de diffraction icosaédrique présentant une symétrie d'ordre cinq. Qu'y a-t-il de si surprenant? Tout simplement, on sait depuis le XVIIIe siècle que la symétrie pentagonale - tout comme les symétries d'ordre égal ou supérieur à 7 - est interdite dans la structure tripériodique des cristaux. 3, record 6, French, - d%27ordre
Record 6, Spanish
Record 6, Textual support, Spanish
Record 7 - internal organization data 2002-07-16
Record 7, English
Record 7, Subject field(s)
- General Mechanics (Physics)
- Flight Instruments and Equipment (Aeroindustry)
- Navigation Instruments
Record 7, Main entry term, English
- commanded precession rate
1, record 7, English, commanded%20precession%20rate
correct
Record 7, Abbreviations, English
Record 7, Synonyms, English
Record 7, Textual support, English
Record number: 7, Textual support number: 1 CONT
Controlled pendulum. The gyro spinning wheel is running at constant speed. The precession drive, which lies in a plane symmetric with respect to the gimbal is controlled to create a precession rate of the spinning wheel. Measurement of the rotation angle around the horizontal axis perpendicular to the symmetry plane of the gimbal is used to perform the precession control. This control aims to keep the center of gravity of the gimbal assembly over the rotation axis. The commanded precession rate is such that the gyroscopic torque counterbalances the gravity torque and the disturbing torques... 1, record 7, English, - commanded%20precession%20rate
Record 7, French
Record 7, Domaine(s)
- Mécanique générale (Physique)
- Instruments et équipement de bord (Constructions aéronautiques)
- Instruments de navigation
Record 7, Main entry term, French
- vitesse de précession commandée
1, record 7, French, vitesse%20de%20pr%C3%A9cession%20command%C3%A9e
correct, feminine noun
Record 7, Abbreviations, French
Record 7, Synonyms, French
Record 7, Textual support, French
Record number: 7, Textual support number: 1 CONT
Pendule asservi. La toupie gyroscopique est entraînée à vitesse constante. Le moteur de précession qui est dans le plan de symétrie du berceau est commandé pour produire une vitesse de basculement de la toupie. La mesure de l'angle de rotation autour de l'axe horizontal perpendiculaire au plan de symétrie du berceau est utilisée pour réaliser la commande du moteur de précession. Cette commande a pour but de maintenir le centre de gravité de l'ensemble à la verticale de l'axe de rotation horizontal. La vitesse de précession commandée est telle que le couple gyroscopique produit contre-balance le couple de gravité et les couples perturbateurs [...] 1, record 7, French, - vitesse%20de%20pr%C3%A9cession%20command%C3%A9e
Record 7, Spanish
Record 7, Textual support, Spanish
Record 8 - internal organization data 2002-04-17
Record 8, English
Record 8, Subject field(s)
- Flight Instruments and Equipment (Aeroindustry)
- Aircraft Piloting and Navigation
- Navigation Instruments
Record 8, Main entry term, English
- controlled pendulum
1, record 8, English, controlled%20pendulum
correct
Record 8, Abbreviations, English
Record 8, Synonyms, English
Record 8, Textual support, English
Record number: 8, Textual support number: 1 CONT
Controlled pendulum. The gyro spinning wheel is running at constant speed. The precession drive, which lies in a plane symmetric with respect to the gimbal is controlled to create a precession rate of the spinning wheel. Measurement of the rotation angle around the horizontal axis perpendicular to the symmetry plane of the gimbal is used to perform the precession control. This control aims to keep the center of gravity of the gimbal assembly over the rotation axis. The commanded precession rate is such that the gyroscopic torque counterbalances the gravity torque and the disturbing torques... 1, record 8, English, - controlled%20pendulum
Record 8, French
Record 8, Domaine(s)
- Instruments et équipement de bord (Constructions aéronautiques)
- Pilotage et navigation aérienne
- Instruments de navigation
Record 8, Main entry term, French
- pendule asservi
1, record 8, French, pendule%20asservi
correct, masculine noun
Record 8, Abbreviations, French
Record 8, Synonyms, French
Record 8, Textual support, French
Record number: 8, Textual support number: 1 CONT
Pendule asservi. La toupie gyroscopique est entraînée à vitesse constante. Le moteur de précession qui est dans le plan de symétrie du berceau est commandé pour produire une vitesse de basculement de la toupie. La mesure de l'angle de rotation autour de l'axe horizontal perpendiculaire au plan de symétrie du berceau est utilisée pour réaliser la commande du moteur de précession. Cette commande a pour but de maintenir le centre de gravité de l'ensemble à la verticale de l'axe de rotation horizontal. La vitesse de précession commandée est telle que le couple gyroscopique produit contre-balance le couple de gravité et les couples perturbateurs [...] 1, record 8, French, - pendule%20asservi
Record 8, Spanish
Record 8, Textual support, Spanish
Record 9 - internal organization data 2001-09-14
Record 9, English
Record 9, Subject field(s)
- General Mechanics (Physics)
- Aircraft Piloting and Navigation
- Navigation Instruments
- Flight Instruments and Equipment (Aeroindustry)
Record 9, Main entry term, English
- instantaneous angular velocity
1, record 9, English, instantaneous%20angular%20velocity
correct
Record 9, Abbreviations, English
Record 9, Synonyms, English
Record 9, Textual support, English
Record number: 9, Textual support number: 1 CONT
Gyrometers and gyroscopes. Gyrometers measure the angular velocity. Such measurement is based on the measure of Coriolis forces for a mobile in linear motion, when an additional rotation occurs... Gyroscopes are made of a solid body with high angular velocity around an axis of symmetry... which induces a high angular stability in presence of perturbations. Such a device is used to preserve a fixed inertial orientation, while the rest of the system in in motion. It must be noted that both devices provide an information about angular velocity. The first device output is the instantaneous angular velocity, while the second device output is the integration of the angular velocity during a period of time. Angular position information can be computed from gyrometers output by integration, while angular velocity information can be computed from gyroscopes output by derivation. 2, record 9, English, - instantaneous%20angular%20velocity
Record 9, French
Record 9, Domaine(s)
- Mécanique générale (Physique)
- Pilotage et navigation aérienne
- Instruments de navigation
- Instruments et équipement de bord (Constructions aéronautiques)
Record 9, Main entry term, French
- vitesse angulaire instantanée
1, record 9, French, vitesse%20angulaire%20instantan%C3%A9e
correct, feminine noun
Record 9, Abbreviations, French
Record 9, Synonyms, French
Record 9, Textual support, French
Record number: 9, Textual support number: 1 CONT
Principe de fonctionnement des centrales inertielles à composants liés [...] La connaissance des vitesses angulaires instantanées permet par intégration de connaître en permanence la position angulaire du trièdre avion par rapport au repère géographique local. Les composantes du vecteur force spécifique, mesurées par les accéléromètres dans le trièdre avion peuvent alors être projetées dans le trièdre géographique local. 1, record 9, French, - vitesse%20angulaire%20instantan%C3%A9e
Record 9, Spanish
Record 9, Textual support, Spanish
Record 10 - internal organization data 2001-09-10
Record 10, English
Record 10, Subject field(s)
- General Mechanics (Physics)
- Flight Instruments and Equipment (Aeroindustry)
- Navigation Instruments
Record 10, Main entry term, English
- disturbing torque
1, record 10, English, disturbing%20torque
correct
Record 10, Abbreviations, English
Record 10, Synonyms, English
Record 10, Textual support, English
Record number: 10, Textual support number: 1 CONT
Controlled pendulum. The gyro spinning wheel is running at constant speed. The precession drive, which lies in a plane symmetric with respect to the gimbal is controlled to create a precession rate of the spinning wheel. Measurement of the rotation angle around the horizontal axis perpendicular to the symmetry plane of the gimbal is used to perform the precession control. This control aims to keep the center of gravity of the gimbal assembly over the rotation axis. The commanded precession rate is such that the gyroscopic torque counterbalances the gravity torque and the disturbing torques... 2, record 10, English, - disturbing%20torque
Record 10, French
Record 10, Domaine(s)
- Mécanique générale (Physique)
- Instruments et équipement de bord (Constructions aéronautiques)
- Instruments de navigation
Record 10, Main entry term, French
- couple perturbateur
1, record 10, French, couple%20perturbateur
correct, masculine noun
Record 10, Abbreviations, French
Record 10, Synonyms, French
Record 10, Textual support, French
Record number: 10, Textual support number: 1 CONT
Pendule asservi. La toupie gyroscopique est entraînée à vitesse constante. Le moteur de précession qui est dans le plan de symétrie du berceau est commandé pour produire une vitesse de basculement de la toupie. La mesure de l'angle de rotation autour de l'axe horizontal perpendiculaire au plan de symétrie du berceau est utilisée pour réaliser la commande du moteur de précession. Cette commande a pour but de maintenir le centre de gravité de l'ensemble à la verticale de l'axe de rotation horizontal. La vitesse de précession commandée est telle que le couple gyroscopique produit contre-balance le couple de gravité et les couples perturbateurs [...] 2, record 10, French, - couple%20perturbateur
Record 10, Spanish
Record 10, Textual support, Spanish
Record 11 - internal organization data 2001-09-10
Record 11, English
Record 11, Subject field(s)
- Gears and Friction Wheels
- Flight Instruments and Equipment (Aeroindustry)
Record 11, Main entry term, English
- gear of the precession drive
1, record 11, English, gear%20of%20the%20precession%20drive
correct
Record 11, Abbreviations, English
Record 11, Synonyms, English
Record 11, Textual support, English
Record number: 11, Textual support number: 1 CONT
Gyroscopic pendulum. Free pendulum. The gyro spinning wheel is running at constant speed. The precession drive, which lies in a plane symmetric with respect to the gimbal is not controlled. When the gimbal becomes free, the gravity torque drives it around the horizontal axis, perpendicular to the symmetry plane, until it falls on the top. This rate of rotation of the gimbal creates a gyroscopic torque that makes the spinner rotate around the precession axis in spite of the friction due to the gear of the precession drive. 1, record 11, English, - gear%20of%20the%20precession%20drive
Record 11, Key term(s)
- precession drive gear
Record 11, French
Record 11, Domaine(s)
- Engrenages et roues de friction
- Instruments et équipement de bord (Constructions aéronautiques)
Record 11, Main entry term, French
- réducteur du moteur de précession
1, record 11, French, r%C3%A9ducteur%20du%20moteur%20de%20pr%C3%A9cession
correct, masculine noun
Record 11, Abbreviations, French
Record 11, Synonyms, French
Record 11, Textual support, French
Record number: 11, Textual support number: 1 CONT
Pendule gyroscopique. Pendule libre. La toupie gyroscopique est entraînée à vitesse constante. Le moteur de précession qui est dans le plan de symétrie du berceau n'est pas commandé. Quand on lâche le berceau, le couple de gravité fait tourner le berceau autour de son axe horizontal perpendiculaire à son plan de symétrie jusqu'à tomber sur la butée. Cette vitesse de rotation induit un couple gyroscopique qui fait basculer la toupie autour de son axe de précession malgré la résistance du réducteur du moteur de précession. 1, record 11, French, - r%C3%A9ducteur%20du%20moteur%20de%20pr%C3%A9cession
Record 11, Spanish
Record 11, Textual support, Spanish
Record 12 - internal organization data 2001-08-24
Record 12, English
Record 12, Subject field(s)
- Measuring Instruments (Engineering)
- Navigation Instruments
- Flight Instruments and Equipment (Aeroindustry)
- River and Sea Navigation
Record 12, Main entry term, English
- gyrometer
1, record 12, English, gyrometer
correct
Record 12, Abbreviations, English
Record 12, Synonyms, English
- rate gyro 2, record 12, English, rate%20gyro
correct
- rate gyroscope 3, record 12, English, rate%20gyroscope
correct
- velocity gyroscope 4, record 12, English, velocity%20gyroscope
correct
Record 12, Textual support, English
Record number: 12, Textual support number: 1 DEF
A special kind of gyroscope that measures rotation rate around a fixed axis. 5, record 12, English, - gyrometer
Record number: 12, Textual support number: 2 DEF
A gyroscope that is suspended in just one gimbal whose bearings form its output axis and which is restrained by a spring; rotation of the gyroscope frame about an axis perpendicular to both spin and output axes produces precession of the gimbal within the bearings proportional to the rate of rotation. 6, record 12, English, - gyrometer
Record number: 12, Textual support number: 1 CONT
Gyrometers and gyroscopes. Gyrometers measure the angular velocity. Such measurement is based on the measure of Coriolis forces for a mobile in linear motion, when an additional rotation occurs... Gyroscopes are made of a solid body with high angular velocity around an axis of symmetry... which induces a high angular stability in presence of perturbations. Such a device is used to preserve a fixed inertial orientation, while the rest of the system in motion. It must be noted that both devices provide an information about angular velocity. The first device output is the instantaneous angular velocity, while the second device output is the integration of the angular velocity during a period of time. Angular position information can be computed from gyrometers output by integration, while angular velocity information can be computed from gyroscopes output by derivation. 7, record 12, English, - gyrometer
Record 12, French
Record 12, Domaine(s)
- Instruments de mesure (Ingénierie)
- Instruments de navigation
- Instruments et équipement de bord (Constructions aéronautiques)
- Navigation fluviale et maritime
Record 12, Main entry term, French
- gyromètre
1, record 12, French, gyrom%C3%A8tre
correct, masculine noun
Record 12, Abbreviations, French
Record 12, Synonyms, French
- mesureur de vitesse angulaire 2, record 12, French, mesureur%20de%20vitesse%20angulaire
correct, masculine noun
- gyromètre capteur de vitesse angulaire 3, record 12, French, gyrom%C3%A8tre%20capteur%20de%20vitesse%20angulaire
correct, masculine noun
Record 12, Textual support, French
Record number: 12, Textual support number: 1 DEF
Capteur gyroscopique à un ou plusieurs degrés de liberté, utilisé pour la mesure des vitesses angulaires. 4, record 12, French, - gyrom%C3%A8tre
Record number: 12, Textual support number: 1 CONT
Le gyroscope est un appareil capable de fournir une direction physique de référence et, corrélativement, une information de rotation angulaire, sous forme d'un écart angulaire, ou d'un angle total [...] compris entre 0 et 360 [degrés], vis-à-vis d'un référentiel absolu ou «inertiel». Le gyromètre est un appareil capable de fournir une information de vitesse angulaire, vis-à-vis d'un référentiel absolu (c'est-à-dire par rapport aux étoiles). 2, record 12, French, - gyrom%C3%A8tre
Record number: 12, Textual support number: 2 CONT
Tel qu'il vient d'être décrit, c'est-à-dire avec rappel élastique et amortissement visqueux [...] [le gyroscope à 1 axe] se comporte comme un gyromètre (rate gyro), c'est-à-dire un capteur de rotation instantanée absolue. 5, record 12, French, - gyrom%C3%A8tre
Record number: 12, Textual support number: 1 OBS
Dans un certain nombre de cas, un même appareil peut être capable de fonctionner en gyroscope ou en gyromètre. [...] Les gyroscopes et les gyromètres sont utilisés : pour la stabilisation d'une direction ou d'un référentiel mécanique, par exemple pour la stabilisation d'une caméra, d'une antenne ou d'un viseur infrarouge d'un autodirecteur de missile; pour piloter un missile ou une fusée sur sa trajectoire; en association avec des «accéléromètres» , pour déterminer la position, la vitesse et l'attitude d'un véhicule (avion, char, bateau, sous-marin, etc.). Dans ce cas, il s'agit d'un équipement appelé centrale inertielle. 2, record 12, French, - gyrom%C3%A8tre
Record 12, Spanish
Record 12, Textual support, Spanish
Record 13 - internal organization data 2000-09-11
Record 13, English
Record 13, Subject field(s)
- Mathematics
- Physics of Solids
Record 13, Main entry term, English
- rotational symmetry
1, record 13, English, rotational%20symmetry
correct
Record 13, Abbreviations, English
Record 13, Synonyms, English
- rotation symmetry 2, record 13, English, rotation%20symmetry
correct
Record 13, Textual support, English
Record number: 13, Textual support number: 1 CONT
Transposition, rotation, and mirror symmetries, acting together, shape crystals from diamonds to snowflakes. And the same three symmetries govern much of what we find pleasing in ornamental designs. 3, record 13, English, - rotational%20symmetry
Record 13, French
Record 13, Domaine(s)
- Mathématiques
- Physique des solides
Record 13, Main entry term, French
- symétrie de rotation
1, record 13, French, sym%C3%A9trie%20de%20rotation
correct, feminine noun
Record 13, Abbreviations, French
Record 13, Synonyms, French
- symétrie de révolution 2, record 13, French, sym%C3%A9trie%20de%20r%C3%A9volution
feminine noun
Record 13, Textual support, French
Record number: 13, Textual support number: 1 DEF
Invariance d'une figure par des rotations d'angle arbitraire. 3, record 13, French, - sym%C3%A9trie%20de%20rotation
Record number: 13, Textual support number: 1 PHR
Symétrie de rotation d'ordre 4, d'ordre 5, d'ordre 6. 4, record 13, French, - sym%C3%A9trie%20de%20rotation
Record 13, Spanish
Record 13, Textual support, Spanish
Record 14 - internal organization data 1998-08-18
Record 14, English
Record 14, Subject field(s)
- Plane Geometry
- Mineralogy
Record 14, Main entry term, English
- rotational symmetry
1, record 14, English, rotational%20symmetry
correct
Record 14, Abbreviations, English
Record 14, Synonyms, English
Record 14, Textual support, English
Record number: 14, Textual support number: 1 CONT
"symmetry" : In general, a figure or expression is said to be symmetric if parts of it may be interchanged without changing the whole.... A right circular cone has an axis of symmetry. A geometric figure has n-fold rotational symmetry about an axis if a rotation of 360°/n is a symmetry of the figure. Thus an axis of symmetry can be a rotational axis. For example, an axis through the centre of a square perpendicular to the plane is a 4-fold axis since a rotation of 360°/4 produces an identical figure; a diagonal is a 2-fold axis. 2, record 14, English, - rotational%20symmetry
Record number: 14, Textual support number: 2 CONT
The cube shows rotational symmetry with respect to 3 axes, 2-fold with respect to the center of an edge, 3-fold with respect to a vertex, 4-fold with respect to a face. 3, record 14, English, - rotational%20symmetry
Record 14, French
Record 14, Domaine(s)
- Géométrie plane
- Minéralogie
Record 14, Main entry term, French
- symétrie de révolution
1, record 14, French, sym%C3%A9trie%20de%20r%C3%A9volution
correct, feminine noun
Record 14, Abbreviations, French
Record 14, Synonyms, French
- autosymétrie de révolution 2, record 14, French, autosym%C3%A9trie%20de%20r%C3%A9volution
correct, feminine noun
Record 14, Textual support, French
Record number: 14, Textual support number: 1 DEF
invariance d'une figure par des rotations d'angle arbitraire. 2, record 14, French, - sym%C3%A9trie%20de%20r%C3%A9volution
Record number: 14, Textual support number: 1 OBS
"rotationally symmetrical": "à symétrie de révolution". 3, record 14, French, - sym%C3%A9trie%20de%20r%C3%A9volution
Record 14, Spanish
Record 14, Textual support, Spanish
Record 15 - internal organization data 1991-06-20
Record 15, English
Record 15, Subject field(s)
- Plane Geometry
- Mineralogy
Record 15, Main entry term, English
- n-fold axis
1, record 15, English, n%2Dfold%20axis
correct
Record 15, Abbreviations, English
Record 15, Synonyms, English
Record 15, Textual support, English
Record number: 15, Textual support number: 1 CONT
"Symmetry classes". Every crystal belongs to one of the 32 different classes of symmetry, or point groups. The standard notation for describing these classes is that of Schoenflies, who assigned symbols to the various possible symmetry elements according to the following rules: Symbol: Cn. Symmetry Element Possessed by Group: n-fold axis. ... Symbol: T (tetrahedral). Symmetry Element Possessed by Group: four three-fold axes towards vertices or regular tetrahedron. Symbol: O. Symmetry Element Possessed By Group: three mutually perpendicular four-fold axes (cubic group). 1, record 15, English, - n%2Dfold%20axis
Record number: 15, Textual support number: 1 OBS
symmetry" : In general, a figure or expression is said to be symmetric if parts of it may be interchanged without changing the whole.... A right circular cone has an axis of symmetry. A geometric figure has n-fold rotational symmetry about an axis if a rotation of 360°/n is a symmetry of the figure. Thus an axis of symmetry can be a rotational axis. For example, an axis through the centre of a square perpendicular to the plane is a 4-fold axis since a rotation of 360°/4 produces an identical figure; a diagonal is a 2-fold axis. 2, record 15, English, - n%2Dfold%20axis
Record 15, French
Record 15, Domaine(s)
- Géométrie plane
- Minéralogie
Record 15, Main entry term, French
- axe de symétrie d'ordre n
1, record 15, French, axe%20de%20sym%C3%A9trie%20d%27ordre%20n
correct, masculine noun
Record 15, Abbreviations, French
Record 15, Synonyms, French
- axe d'ordre n 1, record 15, French, axe%20d%27ordre%20n
correct, masculine noun
Record 15, Textual support, French
Record number: 15, Textual support number: 1 CONT
Un axe de symétrie est dit axe d'ordre n par rapport à une surface ou à un système de plan, et, en minéralogie, par rapport à une face, quand cet axe de symétrie est tel qu'en faisant tourner la figure de 2 [pi]/n, on retombe sur la surface primitive. 1, record 15, French, - axe%20de%20sym%C3%A9trie%20d%27ordre%20n
Record 15, Spanish
Record 15, Textual support, Spanish
Record 16 - internal organization data 1991-02-04
Record 16, English
Record 16, Subject field(s)
- Plane Geometry
- Mineralogy
Record 16, Main entry term, English
- n-fold rotational symmetry
1, record 16, English, n%2Dfold%20rotational%20symmetry
correct
Record 16, Abbreviations, English
Record 16, Synonyms, English
Record 16, Textual support, English
Record number: 16, Textual support number: 1 CONT
"symmetry" : In general, a figure or expression is said to be symmetric if parts of it may be interchanged without changing the whole.... A right circular cone has an axis of symmetry. A geometric figure has n-fold rotational symmetry about an axis if a rotation of 360°/n is a symmetry of the figure. Thus an axis of symmetry can be a rotational axis. For example, an axis through the centre of a square perpendicular to the plane is a 4-fold axis since a rotation of 360°/4 produces an identical figure; a diagonal is a 2-fold axis. 1, record 16, English, - n%2Dfold%20rotational%20symmetry
Record 16, French
Record 16, Domaine(s)
- Géométrie plane
- Minéralogie
Record 16, Main entry term, French
- symétrie de révolution d'ordre n
1, record 16, French, sym%C3%A9trie%20de%20r%C3%A9volution%20d%27ordre%20n
proposal, feminine noun
Record 16, Abbreviations, French
Record 16, Synonyms, French
Record 16, Textual support, French
Record number: 16, Textual support number: 1 OBS
Proposition de M. Jean-Marc TERRIER, professeur de mathématiques à l'Université de Montréal, après qu'il ait consulté un collègue cristallographe. 1, record 16, French, - sym%C3%A9trie%20de%20r%C3%A9volution%20d%27ordre%20n
Record 16, Spanish
Record 16, Textual support, Spanish
Record 17 - internal organization data 1979-07-13
Record 17, English
Record 17, Subject field(s)
- Mineralogy
- Scientific Measurements and Analyses
Record 17, Main entry term, English
- dispiration
1, record 17, English, dispiration
correct
Record 17, Abbreviations, English
Record 17, Synonyms, English
Record 17, Textual support, English
Record number: 17, Textual support number: 1 CONT
Screw symmetry can be interpreted as a combination of translation and rotation operations, and it might seem that the corresponding defect if merely a combination of a dislocation and a disclination. Actually it is a distinct kind of structural defect, which has been given the name dispiration. 1, record 17, English, - dispiration
Record 17, French
Record 17, Domaine(s)
- Minéralogie
- Mesures et analyse (Sciences)
Record 17, Main entry term, French
- déspiralisation 1, record 17, French, d%C3%A9spiralisation
Record 17, Abbreviations, French
Record 17, Synonyms, French
Record 17, Textual support, French
Record number: 17, Textual support number: 1 CONT
On peut interpréter [la symétrie hélicoïdale] comme la combinaison d'une translation et d'une rotation autour d'un axe parallèle à cette translation; on pourrait en déduire que le défaut résultant est la combinaison d'une dislocation et d'une désinclinaison. En fait, il s'agit d'un défaut structural d'un tout autre type, appelé une déspiralisation. 2, record 17, French, - d%C3%A9spiralisation
Record 17, Spanish
Record 17, Textual support, Spanish
Record 18 - internal organization data 1978-01-31
Record 18, English
Record 18, Subject field(s)
- Casting and Patternmaking (Metal Processing)
Record 18, Main entry term, English
- centrifuging
1, record 18, English, centrifuging
correct
Record 18, Abbreviations, English
Record 18, Synonyms, English
Record 18, Textual support, English
Record number: 18, Textual support number: 1 CONT
The inertia forces of rotation distribute the molten metal into the mold cavities during the centrifugal casting, of which there are three categories : true centrifugal casting, semi-centrifugal casting, and centrifuging. The first two processes produce hollow cylindrical shapes and parts with rotational symmetry, respectively. In the third process the mold cavities are spun at a certain radius from the axis of rotation; the centrifugal force thus increases the pressure in the mold cavity. 1, record 18, English, - centrifuging
Record 18, French
Record 18, Domaine(s)
- Moulage et modelage des métaux
Record 18, Main entry term, French
- coulée sous pression centrifuge
1, record 18, French, coul%C3%A9e%20sous%20pression%20centrifuge
correct
Record 18, Abbreviations, French
Record 18, Synonyms, French
Record 18, Textual support, French
Record number: 18, Textual support number: 1 CONT
La coulée par centrifugation consiste à couler l'alliage le long d'un axe autour duquel le moule est animé d'un mouvement de rotation. [La nature du moule] dépend du mode de centrifugation utilisé: centrifugation pure, (...) semi-centrifugation (...), coulée sous pression centrifuge: pour pièces en aciers, fontes ou bronzes ordinaires sans axe de symétrie ou de révolution, pouvant donc être de forme quelconque, creuses ou non, réparties avec équilibre dans le moule (...) 1, record 18, French, - coul%C3%A9e%20sous%20pression%20centrifuge
Record 18, Spanish
Record 18, Textual support, Spanish
Record 19 - internal organization data 1977-01-03
Record 19, English
Record 19, Subject field(s)
- Mineralogy
Record 19, Main entry term, English
- symmetry axis of rotary inversion
1, record 19, English, symmetry%20axis%20of%20rotary%20inversion
correct
Record 19, Abbreviations, English
Record 19, Synonyms, English
Record 19, Textual support, English
Record number: 19, Textual support number: 1 OBS
This composite symmetry element combines a rotation about an axis with inversion through the center. Both operations must be completed before the new position is obtained. 1, record 19, English, - symmetry%20axis%20of%20rotary%20inversion
Record 19, French
Record 19, Domaine(s)
- Minéralogie
Record 19, Main entry term, French
- axe de symétrie inverse
1, record 19, French, axe%20de%20sym%C3%A9trie%20inverse
correct
Record 19, Abbreviations, French
Record 19, Synonyms, French
Record 19, Textual support, French
Record number: 19, Textual support number: 1 OBS
On dit qu'une figure possède un axe de symétrie inverse si elle est superposable à elle-même par la transformation résultant d'un déplacement (rotation autour d'un axe de symétrie directe) suivi d'une symétrie par rapport à un point situé sur l'axe (inversion). 1, record 19, French, - axe%20de%20sym%C3%A9trie%20inverse
Record 19, Spanish
Record 19, Textual support, Spanish
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