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DISTANCE RATE [64 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2023-10-17

English

Subject field(s)
  • Electronic Devices
  • Scientific Measurements and Analyses
CONT

How do analog sampling oscilloscopes achieve [their] accuracy... The trigger event occurs several dozen nanoseconds ahead of the sample point and initiates a variable monostable that causes successive sample points to occur at an increasing distance from the trigger event. Thus the analog sampling oscilloscope can build up a stable display of a waveform, which is many times faster than the sample rate.

French

Domaine(s)
  • Dispositifs électroniques
  • Mesures et analyse (Sciences)

Spanish

Save record 1

Record 2 2022-03-18

English

Subject field(s)
  • Astrophysics and Cosmography
  • Space Physics
CONT

[The] steady-state theory, in cosmology, [is] a view that the universe is always expanding but maintaining a constant average density, with matter being continuously created to form new stars and galaxies at the same rate that old ones become unobservable as a consequence of their increasing distance and velocity of recession.

French

Domaine(s)
  • Astrophysique et cosmographie
  • Physique spatiale

Spanish

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Record 3 2021-02-15

English

Subject field(s)
  • Aircraft Piloting and Navigation
  • Special-Language Phraseology
CONT

When [the] distance exceeds two miles, the maximum difference between the procedure turn completion altitude and the MDA [minimum descent altitude] shall be reduced at the rate of 25 feet for each one tenth of a mile in excess of two miles.

French

Domaine(s)
  • Pilotage et navigation aérienne
  • Phraséologie des langues de spécialité
CONT

Si [la] distance est supérieure à deux [milles], la différence maximale entre l'altitude à la fin du virage conventionnel et [l'altitude minimale de descente] doit être réduite de 25 pieds pour chaque dixième de mille dépassant deux [milles].

Spanish

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Record 4 2017-06-09

English

Subject field(s)
  • Materials Handling
CONT

... an exclusive loader system that has doubled our loading rate, due to dual quadrant ship loaders and the shortest distance from railcar to ship available.

OBS

Valley Camp’s new potash facility at Thunder Bay, Ontario. (CN)

French

Domaine(s)
  • Manutention
OBS

Le chargeur en cales a pour objet le chargement des cales de navires en produits en vrac, la desserte s'effectuant dans les meilleures conditions grâce au réglage de l'angle de projection et à la manœuvre des systèmes de pivotement et de relevage.

OBS

Système de chargement en cales.

OBS

chargeurs en cales jumelés : terme uniformisé par le CN.

Spanish

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Record 5 2016-03-07

English

Subject field(s)
  • Diagnostic Procedures (Medicine)
  • Blood
DEF

The rate at which erythrocytes sediment from a well-mixed specimen of venous blood, as measured by the distance that the top of the column of erythrocytes falls in a specified time interval under specified conditions.

French

Domaine(s)
  • Méthodes diagnostiques (Médecine)
  • Sang
DEF

Analyse de sang mesurant la hauteur de plasma en millimètre, calculée au bout d'une heure de sédimentation de sang total prélevé sur anticoagulant.

Spanish

Campo(s) temático(s)
  • Procedimientos diagnósticos (Medicina)
  • Sangre
DEF

Análisis de sangre en el que se utiliza un tubo especial para medir la extensión y velocidad de sedimentación de los glóbulos rojos en una columna de sangre citratada, que varían en distintos estados fisiológicos y patológicos.

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Record 6 2015-09-25

English

Subject field(s)
  • Telephone Services
  • Telecommunications
DEF

A wireline-based telephone service that provides customers with unlimited local calling within a defined area at a flat monthly rate, as well as access to a long distance network of the customer's choice.

French

Domaine(s)
  • Services téléphoniques
  • Télécommunications
DEF

Service de téléphonie filaire qui permet aux clients d’effectuer un nombre illimité d’appels locaux dans une zone définie à un tarif mensuel fixe et leur offre l’accès au réseau interurbain de leur choix.

Spanish

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Record 7 2015-04-29

English

Subject field(s)
  • Atomic Physics
DEF

The product of exposure rate at a given distance from a point source of gamma-radiation-emitting nuclide and the square of that distance divided by the activity of the source, neglecting attenuation.

OBS

specific gamma-ray constant: term and definition standardized by ISO.

French

Domaine(s)
  • Physique atomique
DEF

Produit du débit d'exposition à une distance donnée d'une source ponctuelle de ce nucléide émetteur gamma par le carré de cette distance divisé par l'activité de cette source, l'atténuation étant négligée.

OBS

constante spécifique de rayonnement gamma : terme et définition normalisés par l'ISO.

Spanish

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Record 8 2014-08-20

English

Subject field(s)
  • Road Traffic
  • Highway Code
CONT

The radar detected up to 20 objects that were located within 150 m in the forward scene. For each of these objects, the range(distance between the object and the host vehicle), range rate(relative speed) and angle were measured.

French

Domaine(s)
  • Circulation routière
  • Code de la route
CONT

L’utilisation du [radar mobile] dans le flot de la circulation implique également de la part des agents le respect d’une différence de vitesse minimum entre le véhicule hôte et le véhicule cible d’au moins 20 km/h.

Spanish

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Record 9 2012-11-01

English

Subject field(s)
  • Military Equipment Maintenance
DEF

The recurring interval between scheduled maintenance actions expressed in units of time, distance or rate of usage.

French

Domaine(s)
  • Maintenance du matériel militaire
DEF

Intervalle régulier entre les actes d'entretien planifiés, exprimé en unités de temps, de distance ou de fréquence d'utilisation.

Spanish

Save record 9

Record 10 - external organization data 2011-10-03

English

Subject field(s)
  • Nuclear Waste Materials
  • Compartment - Canadian Nuclear Safety Commission
DEF

... wastes that are only slightly contaminated and can normally be transported without special precautions such as shielded containers. (This definition of low level waste is commonly used in Canada for classifying beta-gamma emitters...)

CONT

Low-level radioactive waste (LLW) is composed of a variety of substances that are generated by a large number of processes. Due to this heterogenous mixture, there is no universally accepted classification scheme. The following is used in this report: - Low-Level Waste (LLW) - requires no shielding and does not generate significant heat. - Intermediate-Level Waste (ILW); High-Level Waste (HLW).

CONT

The Task Force’s assessment of this problem led it to develop its own definition and classification system, based primarily on the specific activity and half-life of the materials involved. First, it defined low-level radioactive waste as being: all those radioactive wastes, other than spent fuel, arising from the mining, milling, refining or use of materials containing radionuclides. Second, it divided low-level wastes into four categories or classes ... based on the concentration of radioactivity ... of the waste material ...

OBS

Such wastes produce a dose rate of less than 100 millirem/hour at a distance of 30 cm from the waste.

Key term(s)
  • low activity waste

French

Domaine(s)
  • Déchets nucléaires
  • Tiroir - Commission canadienne de sûreté nucléaire
DEF

[...] déchets [...] de 0 à 200 mCi/m³ [...]

CONT

Les déchets peuvent présenter des activités très diverses; on les classe en déchets de haute, de moyenne ou de faible activité, mais il faut noter que les distinctions ne sont pas toujours nettes : si, par haute activité, on désigne des concentrations de centaines ou de milliers de Ci/l, (curies par litre; 1 Ci = 3,7 X 1010 désintégrations par seconde) et par faible activité des concentrations de l'ordre du mCi/l, on trouve entre ces cas extrêmes toute une gamme de déchets d'activités intermédiaires.

CONT

Les déchets radioactifs de faible activité. Il s'agit de la catégorie 2 des effluents liquides et de la catégorie 1 des résidus solides.

OBS

Dans la classification normalisée établie par l'AIEA, la catégorie 2 des effluents liquides représente les effluents ayant un niveau d'activité compris entre 10 exposant moins 6 et 10 exposant moins 3 Ci/me; la catégorie 1 des résidus solides représente les déchets ayant un débit d'exposition au contact égal ou inférieur à 0,2 R/h.

Spanish

Campo(s) temático(s)
  • Desechos nucleares
  • Compartimiento - Comisión Canadiense de Seguridad Nuclear
Save record 10

Record 11 2011-09-07

English

Subject field(s)
  • Mass Transit
CONT

Flat rate fares favour riders who make long trips by charging them the same amount as riders who travel only a short distance.

OBS

flat-rate fare: term recommended by the Terminology Committee and standardized by the Validation Committee of the Sustainable Mobility Glossary.

French

Domaine(s)
  • Transports en commun
DEF

Tarif indépendant de la distance parcourue ou du nombre de zones traversées.

OBS

tarif unique : terme recommandé par le Comité de terminologie et normalisé par le Comité de validation du Lexique de la mobilité durable.

Spanish

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Record 12 2011-09-01

English

Subject field(s)
  • Atmospheric Physics
  • Air Pollution
DEF

Rate of decrease of temperature with increasing height.

CONT

Lapse Temperature Gradient. This condition normally exists on a clear day when the middle and low clouds cover less than 30 percent of the sky and when the wind speed is less than 5 km/h. It is the least favorable condition for the enemy to employ chemical or biological agents. When a lapse condition exists, area coverage without diffusion will be enhanced with a steady low wind speed of 3 to 7 km/h.

OBS

In common usage, the term "temperature gradient" is reserved for temperature change with horizontal distance and "temperature lapse rate" for change of temperature with height.

OBS

The term "lapse" may also signify, as in "humidity lapse rate", the rate of decrease with height of certain meteorological variables other than temperature.

French

Domaine(s)
  • Physique de l'atmosphère
  • Pollution de l'air
DEF

Taux de décroissance de la température en fonction de la distance, selon la verticale ascendante.

OBS

On considère habituellement un taux moyen sur une distance, par exemple de 100 mètres.

OBS

«gradient vertical» (lapse rate) : Variation décroissante d'un phénomène avec l'élévation, ce phénomène étant généralement la température.

Spanish

Campo(s) temático(s)
  • Física de la atmósfera
  • Contaminación del aire
DEF

Disminución de la temperatura del aire, en grados Celsius por cada 100 m de aumento de altura.

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Record 13 2011-09-01

English

Subject field(s)
  • Metrology and Units of Measure
  • Thermodynamics
  • Meteorological Forecasting, Data Measurement and Analysis
CONT

gradient: In meteorology, the change in the value of an atmospheric variable per unit of horizontal distance, as temperature gradient or air pressure gradient.

OBS

In common usage, the term "temperature gradient" is reserved for temperature change with horizontal distance and the term "temperature lapse rate", for change of temperature with height.

OBS

temperature gradient: term standardized by ISO.

French

Domaine(s)
  • Unités de mesure et métrologie
  • Thermodynamique
  • Prévisions météorologiques et mesure et analyse des données
CONT

gradient : Taux de variation d'un élément météorologique en fonction de la distance. Dans le sens vertical, le gradient de température (gradient thermique) s'exprime en degrés C par 100 m [...] Dans le sens horizontal, le gradient de pression s'exprime en millibars par 100 km ou par degré géographique (111 km).

OBS

gradient de température; gradient thermique : termes normalisés par l'ISO; gradient de température : terme uniformisé par le Comité d'uniformisation de la terminologie aéronautique (CUTA) - Opérations aériennes.

Spanish

Save record 13

Record 14 2011-06-07

English

Subject field(s)
  • Site Development
  • Landscape Architecture
DEF

(grade) A degree of inclination, or a rate of ascent or descent, with respect to the horizontal, of a road, railroad, embankment, conduit, or other engineering structure; it is expressed as a ratio(vertical to horizontal), a fraction(such as m/km or ft/mi), or a percentage(of horizontal distance).

DEF

(gradient) The degree of slope of a pipe invert or road or land surface. Often expressed as a ratio (3:1, 6:1) in feet or meters, or as a percentage (2%, 30%). The gradient is a measurement of the slope height as related to its base.

CONT

Slopes or gradients are expressed as a ratio of the length of rise to the length of run; for example, 1:10 is the same as 10 per cent and 1:50 is the same as 2 per cent.

French

Domaine(s)
  • Aménagement du terrain
  • Architecture paysagère
DEF

Rapport exprimant la variation de la hauteur, ou de la profondeur, en fonction de la distance.

CONT

Pentes. Ces «sols construits» peuvent être relativement perméables [...] ou bien ils sont totalement réfractaires à la pénétration de l'eau [...] Même pour ceux qui sont capables d'absorber une petite pluie, il est bon de prévoir qu'ils ne pourront évacuer rapidement une pluie d'orage ou des précipitations prolongées. Il est donc indispensable de leur donner une pente minimum pour faciliter le ruissellement; il suffira de 1 à 2 cm par mètre.

CONT

L'inclinaison des talus dépend de la cohésion des sols [...] Pour les terrains rencontrés en France dans la majorité des cas, on prend : pour les talus de déblai, [...] la pente est de 50 grades (45 degrés). On désigne cette inclinaison par la fraction 1/1 signifiant 1 de base pour 1 de hauteur.

CONT

La pente d'une allée [...] Une entrée de garage en sous-sol ne peut excéder 20 % de pente [...] Une allée de piéton ne doit pas dépasser 10 % de pente.

OBS

pente : terme uniformisé par le Groupe de travail de terminologie du génie.

Spanish

Campo(s) temático(s)
  • Preparación del terreno
  • Arquitectura paisajista
DEF

Superficie inclinada. La pendiente es la relación entre el desnivel vertical y la distancia horizontal.

OBS

Se expresa generalmente en porcentajes.

Save record 14

Record 15 2010-11-15

English

Subject field(s)
  • Conductors and Resistors
  • Traction (Rail)
OBS

When two electrical conductors are connected, an electrical resistance forms at the transition point between the two conductors. This resistance depends on the contact size and state of the surface. Since surfaces are never flat in microscopic measure, contact only takes place at the highest point. If one considers that the contact point is made by conductor metal on conductor metal, it is valid, as for all resistance, that the value is determined by specific resistance, the surface through which the current rate flows and the height of the "contact peaks. "The greater the amount of contact point surfaces there are, the lower the resulting resistance and consequently the greater is the capacity which the contact points can transmit. The conductors must be firmly pressed together so that the distance, the height of the "contact peaks" is as small as possible and the contact area as large as possible.

French

Domaine(s)
  • Conducteurs et résistances
  • Traction (Chemins de fer)

Spanish

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Record 16 2010-09-15

English

Subject field(s)
  • Biological Sciences
CONT

Triggered conformational changes... are the motions of groups of atoms(i. e. individual side-chains) or whole sections of a protein(i. e. loops of chain, domains of secondary and tertiary structure, or subunit), which occur as a response to a specific stimulus. The distance moved can be as much as 10 [angstrom unit] or more. The time scale can be estimated by studies of the rate of binding or turnover reactions. The energy for triggered conformational change comes from specific interactions, such as electrostatic attractions or hydrogen bonding interactions. The best-known example of a triggered conformational change is the transition in tertiary structure that occurs when ligands bind to the iron atoms of hemoglobin.

OBS

The types of substances whose binding can trigger a specific conformational change include substrates (dihydroxyacetone phosphate in triose phosphate isomerase), coenzymes (NAD binding to lactate dehydrogenase), allosteric effectors (CTP and ATP in aspartic transcarbamylase), inhibitors (statine-containing polypeptide inhibitors of acid proteases) and even protons (the Bohr effect in hemoglobin; pH-dependent conformational changes in adenylate kinase).

French

Domaine(s)
  • Sciences biologiques
DEF

Modification de la conformation des protéines provoquée par la fixation de ligands à leur surface. Parmi ces ligands, notons les substrats, activateurs, inhibiteurs et coenzymes.

Spanish

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Record 17 2010-06-07

English

Subject field(s)
  • Spacecraft
  • Orbital Stations
DEF

[A device that] generates power by converting solar light into electricity.

CONT

Meanwhile, solar cell is very popular as an energy source in space, and you can easily take a look at the huge solar cell panel on the ISS [International Space Station]. But the generation ability of the solar cell decreases in inversely proportional with the rate of 1. 5 power to the distance from the Sun.(The intensity of Sun ray decreases in inversely proportional with 2. 0 power to the distance from the Sun, while the generation efficiency of the solar cell increases with lowering temperature.) Therefore, if we send spacecraft to the planet farther than the Asteroid Belt(numerous small planets existing at the orbit between Mars and Jupiter) and conduct many observational work, solar cell is no longer effective. There, the Sun ray is too weak and a simulation indicates we need huge solar cell panels.

OBS

solar cell: term officially approved by the International Space Station Terminology Approval Group (ISSTAG).

PHR

Solar cell power supply.

French

Domaine(s)
  • Engins spatiaux
  • Stations orbitales
DEF

Dispositif qui convertit directement la lumière solaire en électricité.

OBS

photopile : terme uniformisé par le Groupe de travail de la terminologie de la Station spatiale internationale (GTTSSI).

PHR

Alimentation par piles solaires.

Spanish

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Record 18 2009-10-26

English

Subject field(s)
  • Mathematical Geography
  • Remote Sensing
DEF

A set of parameters which describe the location of satellites with respect to time, and which are transmitted (broadcasted) from the satellites

CONT

The broadcast ephemeris is decoded by all GPS [Global Positioning System] receivers. It contains information that allow the GPS receivers to compute the Earth-Centered Earth-Fixed(ECEF) coordinates of each of the satellites relative to the WGS84 datum. The Keplerian elements consist of positional information at a single reference time, and parameters related to the predicted rate of change in order to account for solar radiation and gravity perturbations. Periodic terms are added for argument of perigee, geocentric distance and inclination. The broadcast ephemeris is transmitted daily to the satellites via the Control Segment for future rebroadcast by the satellites.

OBS

broadcast ephemeris; broadcast ephemerides: terms used at Natural Resources Canada - Earth Sciences Sector.

French

Domaine(s)
  • Géographie mathématique
  • Télédétection
DEF

Ensemble de paramètres décrivant la position des satellites en fonction du temps qui sont émis (diffusés) par les satellites.

CONT

Le Système géodésique mondial (World Geodetic System 1984, WGS84) est le système de référence à l'échelle planétaire du GPS [Global Positioning System], dans lequel sont exprimées les éphémérides des satellites, ceux-ci les retransmettant vers la Terre (éphémérides radiodiffusées ou «broadcast ephemerides»).

OBS

éphémérides diffusées : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

Spanish

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Record 19 2009-08-28

English

Subject field(s)
  • Optical Telecommunications
DEF

A technology that uses light propagating in free space to transmit data between two points.

CONT

Free-Space Optics (also known as FSO, Wireless Optics or Optical Wireless) is an optical data, voice and video transmission system. Like fiber optic cable, wireless optics communication systems use laser light to transmit a digital signal between two transceivers. However, unlike fiber, the laser like is transtmited through the air (free-space) instead of through a glass strand. In order for the digital signal to be transmitted and received, there must be clear line of site between each wireless optics unit. In other words, there should be no obstructions such as trees or buildings between the transceiver units.

CONT

The technology is useful where the physical connection of the transmit and receive locations is difficult, for example in cities where the laying of fibre optic cables is expensive. Free Space Optics is also used to communicate between space-craft, since outside of the atmosphere there is little to distort the signal. The optical links usually use infrared laser light, although low-data-rate communication over short distances is possible using LEDs [Light Emitting Diode]. IrDA [Infrared Data Association] is a very simple form of free-space optical communications. Distances up to the order of 10 km are possible, but the distance and data rate of connection is highly dependent on atmospheric conditions.

OBS

In Information Technology and Communications, IrDA refers to Infrared Data Association, a standard for communication between devices (such as computers, PDAs and mobile phones) over short distances using infrared signals.

Key term(s)
  • free space photonics

French

Domaine(s)
  • Télécommunications optiques
CONT

L'optique sans fil et la radio sont deux technologies foncièrement différentes qui ont longtemps été considérées comme concurrentes. [...] Avec l'optique sans fil, on obtient de très hauts débits garantis jusqu'à 10 Gb [gigabits] se propageant sur de courtes ou de moyennes distances (entre 100 m et 2 km), en «full duplex».

Spanish

Save record 19

Record 20 2009-06-22

English

Subject field(s)
  • Geomorphology and Geomorphogeny
DEF

Cross stratification dominated by concave-up strata deposited in swales ...

CONT

Depending mainly on the relative importance of bed-form shifting vs. rate of aggradation, sets may be very restricted in lateral extent and show mainly concave-up laminae(most workers would probably call this swaly cross stratification), or they may be continuous over a greater lateral distance and show more convex-up laminae.

CONT

... the presence of occasional swaly cross-stratification suggests deposition above storm wave base, and pebbles again indicate the offshore transport of coarser foreshore sediment during storms.

OBS

[This is] similar to hummocky cross stratification, which is dominated by concave-up strata.

OBS

swaly bedding: term used at Natural Resources Canada - Earth Sciences Sector.

Key term(s)
  • swaly crossbedding

French

Domaine(s)
  • Géomorphologie et géomorphogénie
CONT

La partie supérieure [du lithofaciès de Sindou] est franchement grossière et comporte de nombreuses stratifications obliques en gouttières à feuillets soulignés par des galets millimétriques à centimétriques de quartz et disposés en «graded-beding».

CONT

D'une épaisseur maximale à l'affleurement d'environ 150 m, le membre Wa est représenté par des conglomérats, des brèches, des grès moyens à grossiers à litages obliques plans ou en auges avec des blocs de quartzites, à rares galets d'argilites et de gneiss et granitoïdes provenant du démantèlement d'anciens reliefs panafricains avoisinants [...]

OBS

stratification oblique en gouttière : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

Key term(s)
  • litage oblique en gouttières
  • stratification oblique en auges
  • litage oblique en cuillère
  • stratification oblique en cuillères

Spanish

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Record 21 2009-05-21

English

Subject field(s)
  • Scientific Measurements and Analyses
  • General Mechanics (Physics)
DEF

Distance traveled divided by the time of travel.

CONT

Velocity is the rate of movement, or more specifically, the distance traveled per unit of time.

OBS

Rate of motion in a straight line is called linear speed, whereas change of direction per unit time is called angular speed. Speed and velocity are often used interchangeably although some authorities maintain that velocity should be used only for the vector quantity.

OBS

rate of motion: term used at Natural Resources Canada - Earth Sciences Sector.

Key term(s)
  • motion rate
  • movement rate

French

Domaine(s)
  • Mesures et analyse (Sciences)
  • Mécanique générale (Physique)
OBS

vitesse de mouvement : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

Spanish

Save record 21

Record 22 2007-11-07

English

Subject field(s)
  • Electronics
  • Telecommunications
CONT

... distance tracking rate at a reply efficiency of 60% or greater.

French

Domaine(s)
  • Électronique
  • Télécommunications

Spanish

Save record 22

Record 23 2006-02-14

English

Subject field(s)
  • Information Processing (Informatics)
  • Internet and Telematics
DEF

A service that will be offered by the long distance companies at the rate T-1(1. 544 megabits per second) and higher.

French

Domaine(s)
  • Traitement de l'information (Informatique)
  • Internet et télématique
DEF

Service de commutation offert par les sociétés téléphoniques de transport longue distance, à partir de 1,544 Mbps(T1).

Spanish

Save record 23

Record 24 2005-05-18

English

Subject field(s)
  • Thread Spinning (Textiles)
DEF

[A] process that produces a highly impermeable, nonwoven fabric of submicron fibres by pushing a millimeter diameter liquid jet through a nozzle with an electric field.

OBS

The thickness of the electrospun fibres differs depending on the fluid properties, such as viscosity, conductivity, dielectric constant, surface tension, etc. and the molecular weight and process operating parameters of the polymer, such as flow rate of the solution, jet current, applied electrical potential and tip to ground distance.

French

Domaine(s)
  • Filature (Textiles)
DEF

[Procédé] qui donne une étoffe non tissée ultra-imperméable de fibres submicroniques et qui consiste à pousser un jet liquide d'un millimètre de diamètre dans un injecteur au moyen d'un champ électrique.

OBS

L'épaisseur des fibres électrofilées varie selon les propriétés du fluide : sa viscosité, sa conductivité, sa constante diélectrique, sa tension superficielle, etc., de même que le poids moléculaire et les paramètres du polymère influençant le procédé, tels le débit, le courant d'injection, la tension électrique appliquée et la distance entre l'extrémité de l'injecteur et la mise à la terre.

Spanish

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Record 25 2004-10-01

English

Subject field(s)
  • Meteorology
DEF

In meteorology, a point in a time series for which the rate of change of an element on either side and at an equal distance of the point has the same magnitude but the opposite sign.

Key term(s)
  • point of symmetry

French

Domaine(s)
  • Météorologie
DEF

En météorologie, point d'une série chronologique pour lequel le taux de variation d'un élément de part et d'autre et à égale distance de ce point a la même valeur mais est de signe contraire.

Spanish

Campo(s) temático(s)
  • Meteorología
DEF

En meteorología, punto de una serie cronológica en el que la tasa de variación de un elemento a uno y otro lado de ese punto tiene igual magnitud pero es de signo opuesto.

Save record 25

Record 26 2004-03-19

English

Subject field(s)
  • Atmospheric Physics
DEF

The rate of change of pressure with distance.

OBS

pressure gradient; barometric gradient. Mathematically, [it is] a vector, perpendicular to an isobaric line or surface, directed toward low pressure and with a magnitude equal to the rate of change of the pressure with distance. It is equal to-Vp, p being the pressure, or to-[delta] p/[delta] n, n being the distance along the normal directed towards low pressure.

OBS

pressure gradient: the term is sometimes loosely used to denote simply the magnitude of the gradient of the pressure field.

OBS

pressure gradient: term standardized by ISO and officially approved by the International Civil Aviation Organization (ICAO).

French

Domaine(s)
  • Physique de l'atmosphère
DEF

Taux de variation de la pression avec la distance.

OBS

Mathématiquement, [le gradient de pression est un] vecteur perpendiculaire à l'isobare ou à la surface isobare dirigé vers les basses pressions et dont l'intensité est égale au taux de variation de la pression en fonction de la distance.

OBS

gradient de pression : terme normalisé par l'ISO; uniformisé par l'Organisation de l'aviation civile internationale (OACI).

Spanish

Campo(s) temático(s)
  • Física de la atmósfera
DEF

Tasa de variación de la presión con la distancia.

OBS

Matemáticamente, vector perpendicular a la isobara o a la superficie isobárica dirigido hacia las bajas presiones y cuya magnitud es igual a la tasa de variación de la presión en función de la distancia.

OBS

gradiente de presión; gradiente barométrico: términos aceptados oficialmente por la Organización de Aviación Civil Internacional (OACI).

Save record 26

Record 27 2003-07-24

English

Subject field(s)
  • Cooling and Ventilating Systems
  • Occupational Health and Safety
CONT

Receiving hoods are positioned to catch contaminants that are discharged from an operation in a predictable direction. Examples of receiving hoods include canopies located over a hot process in which hot exhaust fumes rise to the hood level by their own buoyancy, and hoods located adjacent to grinding wheels to catch the stream of dust generated by the spinning wheel. Receiving hoods may physically resemble capture hoods, but they differ with respect to the principle used for contaminant capture. Capture hoods operate at a higher flow rate to generate the air velocities necessary to capture contaminants from a source some distance from the hood opening. Receiving hoods, on the other hand, are positioned to catch the stream of contaminants delivered to them by forces intrinsic to the operation.

OBS

Hood designs can be placed into three broad categories based on the methods used to capture contaminants: exterior hoods, receiving hoods, and exhaust enclosures.

French

Domaine(s)
  • Systèmes de refroidissement et de ventilation
  • Santé et sécurité au travail

Spanish

Save record 27

Record 28 2002-11-22

English

Subject field(s)
  • Radar, Radio Guidance and Goniometry
DEF

The radial velocity of a target with respect to the radar for which the response is approximately zero.

OBS

blind speed: term and definition standardized by the Institute of Electrical and Electronics Engineers.

OBS

In a coherent moving target indicator system using a uniform repetition rate, the blind speed is the radial velocity at which the moving target changes distance by one-half wavelength(or multiples thereof) during each pulse period.

French

Domaine(s)
  • Radar, radioguidage et radiogoniométrie
DEF

Vitesse radiale d'un objectif pour laquelle il échappe à la détection d'un radiodétecteur à élimination d'échos fixes.

Spanish

Save record 28

Record 29 2002-08-14

English

Subject field(s)
  • Geomorphology and Geomorphogeny
  • Hydrology and Hydrography
DEF

The rate of change of altitude per unit of distance in the water table at a given place and in a given direction. If the direction is not mentioned, it is generally understood to be the direction along which the maximum rate of change occurs. Where the rate of change is uniform between two points, the gradient is equal to the ratio of the difference of altitude between the two points to the horizontal distance between them.

French

Domaine(s)
  • Géomorphologie et géomorphogénie
  • Hydrologie et hydrographie
DEF

Pente de la surface de la zone de saturation d'une nappe libre.

Spanish

Campo(s) temático(s)
  • Geomorfología y geomorfogénesis
  • Hidrología e hidrografía
Save record 29

Record 30 2002-07-24

English

Subject field(s)
  • Petroleum Asphalts
  • Materials Engineering
  • Engineering Tests and Reliability
DEF

[A test that] measures the temperature... at which a steel ball falls a known distance through the bitumen when the test assembly is heated at a known rate.

CONT

The most commonly used softening-point test is the "ring-and-ball" method.

French

Domaine(s)
  • Bitumes
  • Génie des matériaux
  • Fiabilité, contrôle et essais (Ingénierie)

Spanish

Save record 30

Record 31 2001-11-23

English

Subject field(s)
  • Soil Science
  • Hydrology and Hydrography
CONT

The water travels down with a velocity, v(v=ksin). There is no rain r evaporation from time 0 to t. Thus, the moisture content at x and t... is the same as the moisture content(let's say location xA at time 0) at a distance x-xA uphill from x.... The moisture content at location xA is dependent on the rainfall with rate I prior to time 0 and is determined by moisture content at the top of the slope, 0, plus the amount of rainfall that fell during the time needed to travel from the top to xA.... By imposing dK/d to be constant, we effectively ignore the slow drainage as decreases and, thus, enhance the gravity effect artificially compensating for the fact that we ignored possible macropore flow.

French

Domaine(s)
  • Science du sol
  • Hydrologie et hydrographie
CONT

[...] la vitesse d'infiltration résulte de deux effets : - l'effet de succion, prédominant en début d'infiltration et décroissant rapidement à mesure que la profondeur du sol humecté augmente; - l'effet de la pesanteur pratiquement seul à intervenir au bout d'un certain temps quand la profondeur humectée est suffisamment grande.

Spanish

Save record 31

Record 32 2001-10-30

English

Subject field(s)
  • Air Pollution
  • Environmental Studies and Analyses
  • Atmospheric Physics
CONT

[For a vapour released continuously from a point source at a constant rate the concentration at a point, x, y, z downwind of the source at height h, is given by the following Gaussian Plume equation] where x=downwind distance, y=vertical distance, z=vertical distance....

French

Domaine(s)
  • Pollution de l'air
  • Études et analyses environnementales
  • Physique de l'atmosphère
OBS

Manuel d'introduction, 5.3.2.3.

OBS

Nuisances dues aux activités urbaines, p. 110/14; La pollution atmosphérique, Détrie, p. 208.

Spanish

Campo(s) temático(s)
  • Contaminación del aire
  • Estudios y análisis del medio ambiente
  • Física de la atmósfera
Save record 32

Record 33 2001-08-20

English

Subject field(s)
  • Measuring Instruments (Engineering)
  • Optics
  • Navigation Instruments
CONT

A more advanced type of gyro is the optical gyroscope. These devices are based on two counter-rotating beams of light travelling in a ring-like structure. The interaction of the two light beams produces a standing wave pattern. If the ring is then rotated about its centre axis(think of a torus spinning around its core), one of the beams has to travel a slightly longer distance, and the other a slightly shorter distance to get back to where they started. This will cause a shift in the pattern of the standing wave, and this can be measured to determine the rate of rotation.

CONT

Most people would remember the classic rotating disc gyroscope, which belongs to the mechanical group. One of today’s high precision gyros is still the mechanical, rotating gyro; however it is dependent on linear accelerations because of its mechanical measuring principle. The optical group comprises the fibre optic- and laser types. These use the Sagnac Effect (named after its French discoverer), which, when the sensor is turned, results in a difference in transit time between two light waves passing through the same optical path but in opposite directions. Optical gyros therefore do not depend on acceleration as gyros in the mechanical group. This is one of their biggest advantages ...

French

Domaine(s)
  • Instruments de mesure (Ingénierie)
  • Optique
  • Instruments de navigation
CONT

Réaliser un gyroscope optique d'un prix de revient de quelques centaines de francs. Voilà une prouesse technologique quand on sait que les systèmes actuels, les gyroscopes laser, coûtent entre 100 000 francs et 1 million de francs. La solution mise au point par Mohamed Bouamra, chercheur à l'École nationale supérieure de physique de Strasbourg, tient à une habile substitution de technologies : une simple diode électroluminescente remplace le laser, tandis que des banales fibres optiques multimodes prennent la place des coûteuses fibres monomodes.

CONT

[...] certains laboratoires ont étudié divers dispositifs de mesure des rotations absolues ne présentant qu'une analogie assez lointaine avec les gyroscopes classiques. Ce sont les gyroscopes à vibrations [...]; les gyroscopes nucléaires [...]; les gyroscopes optiques, exploitant les propriétés de la lumière cohérente [...]

Spanish

Save record 33

Record 34 2001-06-28

English

Subject field(s)
  • Engineering Tests and Reliability
  • Petroleum Technology
CONT

The ductility test measures the distance in centimeters to which a molded sample of asphalt material... can be elongated at a specified rate and temperature before breaking.... The test is run in a water bath.

French

Domaine(s)
  • Fiabilité, contrôle et essais (Ingénierie)
  • Technologie pétrolière
CONT

L'essai de ductilité consiste à mesurer la longueur d'allongement avant rupture d'une éprouvette normalisée de bitume. L'essai se fait dans l'eau.

Spanish

Save record 34

Record 35 2000-11-24

English

Subject field(s)
  • Physics
CONT

The alpha particle or neutron will move only a short distance before its energy is all absorbed and it stops, so it has a high rate of energy transfer per unit length travelled.

French

Domaine(s)
  • Physique
CONT

[...] les survivants d'Hiroshima et Nagasaki ont été essentiellement exposés à des rayonnements à faible transfert d'énergie linéique (TEL) [...]

Spanish

Save record 35

Record 36 2000-05-10

English

Subject field(s)
  • Aircraft Piloting and Navigation
CONT

The rate(s) of closing. This factor takes into account the speed with which the amount of clear airspace between any two aircraft is decreasing. Its effect is directly proportional to the length of time over which it operates, i. e., to the distance between reporting points.(att.).

OBS

closing speed: term officially approved by the International Civil Aviation Organization (ICAO).

Key term(s)
  • rate of closure

French

Domaine(s)
  • Pilotage et navigation aérienne
CONT

Les vitesses de rapprochement. Ce facteur fait intervenir la vitesse de décroissance de l'espace aérien libre entre deux aéronefs. Son effet est directement proportionnel à sa durée d'application, c'est-à-dire à la distance entre points de compte rendu. (sup.).

OBS

vitesse de rapprochement : terme uniformisé par l'Organisation de l'aviation civile internationale (OACI).

Spanish

Campo(s) temático(s)
  • Pilotaje y navegación aérea
OBS

Prevención de colisiones.

OBS

velocidad de acercamiento : término aceptado oficialmente por la Organización de Aviación Civil Internacional (OACI).

Save record 36

Record 37 2000-01-27

English

Subject field(s)
  • Silviculture
DEF

A device for catching the seeds falling on a small area of ground, from trees or shrubs. Used for determining the amount of seedfall and the time, period, rate, and distance of dissemination.

French

Domaine(s)
  • Sylviculture
DEF

Dispositif destiné à recueillir sur une petite surface les semences tombant des arbres ou arbustes voisins. Sert à observer l'époque et la durée de l'ensemencement naturel, et sa distance de dissémination, ainsi que les quantités unitaires de cet ensemencement.

Spanish

Save record 37

Record 38 1999-12-20

English

Subject field(s)
  • Physics of Solids
  • Waterproofing (Construction)
OBS

vapor diffusion. The movement of water vapor between two areas caused by a difference in vapor pressure, independent of air movement. The rate of diffusion is determined by 1) the difference in vapor pressure, 2) the distance the vapor must travel, and 3) the permeability of the material to water vapor. Hence, the selection of materials of low permeability for use as vapor retarders in buildings.

French

Domaine(s)
  • Physique des solides
  • Étanchéité (Construction)
DEF

Procédé suivant lequel la vapeur d'eau se répand dans les matériaux perméables en raison d'une différence dans la pression de vapeur d'eau.

Spanish

Save record 38

Record 39 1999-05-11

English

Subject field(s)
  • Site Development
  • Earthmoving
CONT

Angle of repose: The steepest slope angle in which a particular sediment will lie without cascading down.

CONT

slope curvature : The rate of change of angle of slope with distance.

OBS

Not to be confused with "gradient" (see record).

French

Domaine(s)
  • Aménagement du terrain
  • Terrassement
CONT

Angle de talus : c'est l'angle de pente, ou inclinaison, que supporte un talus ou un tas de matériaux granulaires, sans éboulement ni affaissement.

CONT

Les talus. [...] Leur pente peut être plus ou moins prononcée. Si un angle de pente important est souvent nécessaire pour parvenir aux profils satisfaisant les impératifs d'aménagement du terrain, il est cependant limité par des considérations techniques de terrassement.

Spanish

Save record 39

Record 40 1998-02-16

English

Subject field(s)
  • Electrochemistry
OBS

When a kinetic current flows, the concentrations of the electroactive substance B and its precursor C at very small distances from the electrode surface are influenced both by mass transfer and by the finite rate of establishment of the chemical equilibrium. As the distance from the electrode surface increases, the chemical equilibrium is more and more nearly attained. The thickness of the reaction layer is the distance from the electrode surface beyond which deviations from the chemical equilibrium between C and B are taken to be negligibly small.

French

Domaine(s)
  • Électrochimie
OBS

Lorsqu'un courant cinétique circule, les concentrations de la substance électroactive B et de son précurseur qui sont présentes à de très faibles distances de la surface de l'électrode sont influencées à la fois par le transfert de masse et par la vitesse finie à laquelle l'équilibre chimique s'établit. À mesure que l'on s'éloigne de l'électrode, on s'approche pratiquement de l'équilibre chimique. L'épaisseur de la couche réactionnelle est la distance de l'électrode au-delà de laquelle on considère que les écarts, par rapport à l'équilibre chimique, entre B et C sont négligeables.

Spanish

Save record 40

Record 41 1997-11-11

English

Subject field(s)
  • Transportation
OBS

Factor to cover the incremental costs of transportation of spare parts and consumables under the wet lease system in increments of 0. 25 percent(in 1995) of the leasing rate for each complete 500 miles distance, beyond the first 500 miles, along consignment route between the port of embarkation in the home country and the port of entry in the mission area.

French

Domaine(s)
  • Transports

Spanish

Campo(s) temático(s)
  • Transporte
Save record 41

Record 42 1997-04-09

English

Subject field(s)
  • Electrochemistry
DEF

A faradaic current that corresponds to the reduction or oxidation of an electroactive substance formed by a prior chemical reaction from another substance that is not electroactive, and that is partially or entirely controlled by the rate of that reaction. The reaction may be heterogeneous, occurring at an electrode-solution interface(surface reaction), or it may be homogeneous, occurring at some distance from the interface(volume reaction).

French

Domaine(s)
  • Électrochimie
DEF

C'est un courant faradique qui correspond à la réduction ou à l'oxydation d'une substance électroactive, formée par une réaction chimique antérieure à partir d'une autre substance qui n'est pas électroactive; il est partiellement ou entièrement contrôlé par la vitesse de cette réaction. La réaction chimique peut être hétérogène, se produisant à une interface électrode-solution (réaction de surface) ou elle peut être homogène et se produire à une certaine distance de l'interface (réaction de volume).

Spanish

Save record 42

Record 43 1997-03-06

English

Subject field(s)
  • Mine Ventilation, Heating and Lighting
DEF

The quantity of air required to maintain adequate ventilation of the mine. This quantity will depend on(1) the length of the face room in production;(2) the average distance from the shafts to the faces;(3) the gas emission rate;(4) the depth of the workings, and(5) the volumetric efficiency of the mine ventilation.

OBS

Subject-test CANMET-METALLURGY

French

Domaine(s)
  • Ventilation, chauffage et éclairage des mines

Spanish

Save record 43

Record 44 - external organization data 1994-11-03

English

Subject field(s)
  • Radiological Physics (Theory and Application)
  • Compartment - Canadian Nuclear Safety Commission
CONT

... a derived dose rate which in this guide, has its own uncertainty which is associated with the uncertainties of activity(up to +-10%), decay correction(up to +-1%), and calibration distance(up to +-2%).

French

Domaine(s)
  • Physique radiologique et applications
  • Tiroir - Commission canadienne de sûreté nucléaire
CONT

Débit de dose prévu. Débit de dose dérivé qui, dans le présent guide, comporte son propre degré d'incertitude qui est relié aux incertitudes de l'activité (jusqu'à 10 pour 100 plus ou moins), de la correction de la désintégration radioactive (jusqu'à 1 pour 100 plus ou moins) et de la distance d'étalonnage (jusqu'à 2 pour 100 plus ou moins).

Spanish

Save record 44

Record 45 - external organization data 1994-10-27

English

Subject field(s)
  • Radiological Physics (Theory and Application)
  • Compartment - Canadian Nuclear Safety Commission
DEF

... a derived dose rate which in this guide, has its own uncertainty which is associated with the uncertainties of activity(up to +-10%), decay correction(up to +-1%), and calibration distance(up to +-2%).

French

Domaine(s)
  • Physique radiologique et applications
  • Tiroir - Commission canadienne de sûreté nucléaire
DEF

Débit de dose dérivé qui, dans le présent guide, comporte son propre degré d'incertitude qui est relié aux incertitudes de l'activité (jusqu'à 10 pour 100 plus ou moins), de la correction de la désintégration radioactive (jusqu'à 1 pour 100 plus ou moins) et de la distance d'étalonnage (jusqu'à 2 pour 100 plus ou moins).

Spanish

Save record 45

Record 46 1994-07-06

English

Subject field(s)
  • Loans
DEF

Absolute value of the difference.

CONT

A numeric index may be used to establish an index value for a loan agreement if the average of the unsigned difference between the index and bank rate... is less than or equal to 0. 02. The term unsigned difference is used to make it clear that we are interested in the distance between the index and bank rate at any given time, not the sign of this difference.

French

Domaine(s)
  • Prêts et emprunts
OBS

Non signé signifie : non affecté d'un signe + ou -.

Spanish

Save record 46

Record 47 1994-01-19

English

Subject field(s)
  • Information Processing (Informatics)
  • Internet and Telematics
OBS

This IEEE specification matches the thin Ethernet cabling. It designates a 10-megabit-per-second signaling rate, a baseband signaling technique, and a maximum cable-segment distance of 185(nearly 200) meters.

French

Domaine(s)
  • Traitement de l'information (Informatique)
  • Internet et télématique
DEF

Cette spécification IEEE s'applique au câblage mince Ethernet. Elle désigne une vitesse de signalisation de 10Mbps, une technique de signalisation bande de base et une distance de câblage maximale de 185 mètres.

Spanish

Save record 47

Record 48 1994-01-19

English

Subject field(s)
  • Information Processing (Informatics)
  • Internet and Telematics
OBS

This IEEE specification describes a long-distance type of Ethernet cabling with a 10-megabit-per-second signaling rate, a broadband signaling technique, and a maximum cable-segment distance of 3, 600 meters.

French

Domaine(s)
  • Traitement de l'information (Informatique)
  • Internet et télématique
DEF

Cette spécification IEEE décrit un câblage Ethernet longue distance avec une vitesse de 10 Mbps et une distance maximale de câblage de 3 600 mètres.

Spanish

Save record 48

Record 49 1994-01-19

English

Subject field(s)
  • Information Processing (Informatics)
  • Internet and Telematics
DEF

An IEEE specification matching the older AT&T StarLAN product. It designates a 1-megabit-per-second signaling rate, a baseband signaling technique, and a maximum cable-segment distance of 500 meters.

French

Domaine(s)
  • Traitement de l'information (Informatique)
  • Internet et télématique
DEF

Une spécification IEEE qui s'applique aux anciens réseaux StarLAN d'ATT. Elle correspond à une vitesse de signalisation de 1 Mbps, à une technique de signalisation bande de base et à une distance de câblage maximale de 500 mètres.

Spanish

Save record 49

Record 50 1992-01-30

English

Subject field(s)
  • Pricing (Rail Transport)
DEF

A transportation rate applied according to distance.

French

Domaine(s)
  • Tarification (Transport par rail)
DEF

Prix de transport établi en fonction de la distance.

Spanish

Save record 50

Record 51 1991-12-20

English

Subject field(s)
  • Building Ventilation
  • Cooling and Ventilating Systems
  • Occupational Health and Safety
CONT

Hood designs can be placed into three broad categories based on the methods used to capture contaminants: exterior hoods, receiving hoods, and exhaust enclosures.

CONT

Receiving hoods are positioned to catch contaminants that are discharged from an operation in a predictable direction. Examples of receiving hoods include canopies located over a hot process in which hot exhaust fumes rise to the hood level by their own buoyancy, and hoods located adjacent to grinding wheels to catch the stream of dust generated by the spinning wheel.

CONT

Receiving hoods are designed to exhaust air at the same rate as the airflow created by the process by which the contaminants are generated. If the receiving hood is not sized properly, problems such as overloading and spillage will result.

OBS

Receiving hoods may physically resemble capture hoods, but they differ with respect to the principle used for contaminant capture. Capture hoods operate at a higher flow rate to generate the air velocities necessary to capture contaminants from a source some distance from the hood opening. Receiving hoods, on the other hand, are positioned to catch the stream of contaminants delivered to them by forces intrinsic to the operation.

French

Domaine(s)
  • Ventilation (Construction)
  • Systèmes de refroidissement et de ventilation
  • Santé et sécurité au travail
OBS

Sous toutes réserves.

Spanish

Save record 51

Record 52 1991-04-12

English

Subject field(s)
  • Glaciology
DEF

A flow pattern on glaciers in which the velocity decreases with distance downstream; thus the longitudinal strain rate(velocity gradient) is compressive. This condition requires a transverse or vertical expansion, or a negative net balance on the surface, because ice is almost incompressible.

OBS

Ant.: extending flow

French

Domaine(s)
  • Glaciologie
DEF

Type d'écoulement des glaciers caractérisé par une diminution de la vitesse en fonction de la distance vers l'aval.

CONT

Les dépôts glacio-marins indiquent le vêlage d'icebergs au front du glacier (écoulement en extension) tandis que le till en écailles définit au contraire une moraine de cisaillement, caractéristique d'un écoulement en compression de la glace frontale.

Spanish

Save record 52

Record 53 1988-10-28

English

Subject field(s)
  • Rail Transport
CONT

CP suggests that a shipper and connecting carrier could agree to have a very low tariff rate published to an ostensible destination a short distance beyond the interchange, such destination simply being a flow-through point on the route to destination.

French

Domaine(s)
  • Transport par rail
OBS

Équivalents obtenus par le client pigiste auprès d'une personne ressource (pour son texte) de l'Office national des transports.

Spanish

Save record 53

Record 54 1988-03-30

English

Subject field(s)
  • Oil Production
CONT

At some distance from the well, which mainly depends on the initial temperature of the steam and rate of pressure change with distance from the well, the steam condenses and forms a hot water bank.

French

Domaine(s)
  • Production pétrolière

Spanish

Save record 54

Record 55 1986-12-16

English

Subject field(s)
  • Aircraft Piloting and Navigation
CONT

As the aircraft descends through heights of 45 m to 22. 5 m above the runway... the pilot becomes more aware of the expanding runway scene as visual cues are observed to move rapidly outward from the center of expansion. This is due to the speed of the "flowing visual field" increasing at a rate inversely proportional to the distance of the pilot.

French

Domaine(s)
  • Pilotage et navigation aérienne
CONT

Alors que l'avion descend en passant à des hauteurs variant de 45 m à 22,5 m au-dessus de la piste (...), le pilote devient plus conscient de la position relative de la piste et il voit les repères visuels se déplacer rapidement à partir du point de fuite vers l'extérieur. Cette impression est due au fait que la vitesse du "champ visuel flottant" augmente en raison inverse de l'éloignement du pilote.

Spanish

Save record 55

Record 56 1986-06-03

English

Subject field(s)
  • Telephony and Microwave Technology

French

Domaine(s)
  • Téléphonie et techniques hyperfréquences

Spanish

Save record 56

Record 57 1986-06-02

English

Subject field(s)
  • Air Pollution
CONT

For a vapour released continuously from a point source at a constant rate the concentration at a point, x, y, z downwind of the source at height h, is given by the following Gaussian Plume equation... where C=concentration of vapour... U=wind speed... X=downwind distance... y=crosswind distance... z=vertical distance....

French

Domaine(s)
  • Pollution de l'air
OBS

Nuisances dues aux activités urbaines, p. 108/12.

OBS

"distance latérale" : Chovin et Roussel, 1978, p. 17.

Spanish

Save record 57

Record 58 1986-06-02

English

Subject field(s)
  • Fluid Mechanics and Hydraulics (Physics)
DEF

A method of calculating pressures and velocities in a curving stream of water in cases where friction, impact, or eddy losses do not exercise a controlling effect. It consists of drawing a system of streamlines so spaced that the rate of flow is the same between each pair of lines, and a system of normal lines so spaced that the distance between the normal lines equals the distance between the streamlines.

French

Domaine(s)
  • Mécanique des fluides et hydraulique (Physique)
DEF

Méthode graphique d'évaluation de la répartition des pressions et des vitesses dans un écoulement où les effets de la turbulence sont négligeables.

Spanish

Save record 58

Record 59 1986-03-24

English

Subject field(s)
  • Driving (Road Vehicles)
  • Rental Agencies
OBS

["Unlimited mileage"] plans offer the client even more flexibility and independence as they are less expensive than rentals based on time and distance.

French

Domaine(s)
  • Conduite automobile
  • Entreprises de location
DEF

Tarif de location établi sur la base d'un prix correspondant à la durée de la mise à disposition du véhicule, et d'un prix par kilomètre parcouru.

OBS

Locations de véhicules.

Spanish

Save record 59

Record 60 1985-11-04

English

Subject field(s)
  • Rail Transport Operations
DEF

exploitation.

French

Domaine(s)
  • Exploitation (Transport par rail)
DEF

RGCF, nov. 1972, p. 689; juillet 1963.

Spanish

Save record 60

Record 61 1985-07-24

English

Subject field(s)
  • Aircraft Propulsion Systems
CONT

A true pitch propeller is one that makes use of the blade-element theory. Each element(section) of the blade travels at a different rate of speed, that is, the tip sections travel faster than the sections close to the hub. When the elements(sections) are arranged so that each is set at the proper angle to the relative airstream, they all advance the same distance during any single revolution of the propeller.

French

Domaine(s)
  • Propulsion des aéronefs
CONT

Si l'on veut avoir une hélice dont toutes les sections possèdent le même pas H, il suffit de réaliser la condition r tg[alpha]=constante=k (où alpha correspond à l'angle de calage] (...) L'hélice à pas constant ainsi définie n'est plus utilisée à l'heure actuelle; en effet, la présence du fuseau moteur réduit la vitesse de l'air au voisinage du moyeu, ce qui se traduit par la nécessité de réduire le pas dans cette région afin d'obtenir un rendement meilleur. Dès lors, il est nécessaire de définir un "profil de référence" afin de caractériser une telle hélice.

Key term(s)
  • hélice à pas géométrique constant

Spanish

Save record 61

Record 62 1978-05-17

English

Subject field(s)
  • Hydrology and Hydrography
  • Geology
OBS

Distance from the centre of the well to the closest point at which the ground water is not lowered when pumping has produced the maximum steady rate of flow.

French

Domaine(s)
  • Hydrologie et hydrographie
  • Géologie
OBS

Distance à partir du centre du puits au point le plus près où l'eau souterraine n'est pas abaissée lorsque le pompage a produit le débit stable maximum.

Spanish

Save record 62

Record 63 1975-03-11

English

Subject field(s)
  • Telephony and Microwave Technology

French

Domaine(s)
  • Téléphonie et techniques hyperfréquences

Spanish

Save record 63

Record 64 1975-03-11

English

Subject field(s)
  • Telephone Metering

French

Domaine(s)
  • Téléphonométrie

Spanish

Save record 64

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