TERMIUM Plus^®

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When the electron density profile is assumed to be a parabolic distribution in the direction of wave propagation, the effects of air pressure, incident field strength, wave frequency, and plasma thickness on the maximum electron density are investigated.  2, record 1, English, - maximum%20electron%20density

Record 1,  Textual support,  French

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[...] l'électron a une densité électronique maximale à la position nucléaire.  3, record 1, French, - densit%C3%A9%20%C3%A9lectronique%20maximale

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Record 2,  Textual support,  English

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The earth's atmosphere is mostly transparent to the incoming solar radiation, and hence the above radiation from the sun is absorbed by the earth surface. The earth's atmosphere in turn absorbs the terrestrial long wave radiation from the earth surface resulting in a situation where the atmosphere is primarily heated from below. This results in a vertical distribution of air temperature, wherein the air temperature decreases with height.  1, record 2, English, - vertical%20distribution%20of%20air%20temperature

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Coastal weather stations report the winds, air temperature, and pressure; some also report wave information, water temperature, visibility, and dew point.  1, record 3, English, - coastal%20weather%20station

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Record 4,  Textual support,  English

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... any of several wind instruments... that sound when the player's breath or air from a wind chamber causes a reed... to vibrate, thereby setting up a sound wave in an enclosed air column... or in the open air...  4, record 4, English, - reed%20instrument

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Reed instruments. Two kinds of reeds are used in musical instruments, the free reed and the beating reed.  5, record 4, English, - reed%20instrument

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Parmi les instruments à anche, il en est à «anche battante» et d'autres à «anche libre».  3, record 4, French, - instrument%20%C3%A0%20anche

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Rocky shores... are characterized by the life that lives in the intertidal zone – the area between the high tide and low tide water levels. Life on rocky shores is tough. It is dominated by the need to deal with very high wave energy, regular exposure to the air/sun, and interactions between these two physical stressors and the strong biological pressure applied by voracious intertidal predators.  2, record 5, English, - rocky%20shore

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As sound waves leave one medium and enter another, such as an air borne wave in a room reaching a brick wall, the wave will undergo certain characteristics. A portion of the wave will attempt to pass through the medium, while the balance of the wave will reflect back off the wall. Sound wave reflection occurs with that portion of the energy that stays contained to within the room.  1, record 6, English, - sound%20wave%20reflection

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Record 7,  Textual support,  English

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While setting off the cars at Maxville, the conductor closed the angle cocks on the adjoining ends of the cars to be separated and did not vent the air, leaving the air brake line charged on the 74 cars left unattended on the main line. This practice is known in the industry as "bottling the air. "During a train service brake application, the head-end air brake pipe pressure is reduced below the tail-end air brake pipe pressure, creating a pressure differential. When the angle cock on a car is closed before the air pressure equalizes in the brake pipe, a pressure wave is created. This wave can initiate a brake release on the car, which will then cause the brakes to release on subsequent cars.  1, record 7, English, - bottling%20the%20air

Record 7,  Textual support,  French

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Cette pratique peut déclencher le desserrage du frein à air.  4, record 7, French, - emprisonnement%20de%20l%27air

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Record 8,  Textual support,  English

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An organized mass of thunderstorms with a slight cyclonic wind circulation of less than 20 knots.  2, record 8, English, - tropical%20disturbance

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The first sign of hurricane genesis(development) is the appearance of a cluster of thunderstorms over the tropical oceans, called a tropical disturbance. Tropical disturbances most commonly form in one of three different ways, all of which involve the convergence of surface winds. Near the equator, the easterly trade winds converge(come together) to trigger numerous thunderstorms in a region called the Intertropical Convergence Zone(ITCZ). Occasionally, a cluster of thunderstorms will break away from the ITCZ and become better organized. Another mechanism is the convergence of air that occurs along a mid-latitude frontal boundary that has made its way into the Gulf of Mexico or off the East Coast of Florida. The last mechanism is the easterly wave, a tropical disturbance that travels from east to west in the region of the tropical easterlies. Converging winds on the east side of the easterly wave trigger the development of thunderstorms. In fact, most Atlantic hurricanes can be traced to easterly waves that form over Western Africa.  3, record 8, English, - tropical%20disturbance

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Tropical disturbance: light surface winds with indications of cyclonic circulation.  4, record 8, English, - tropical%20disturbance

Record 8,  Textual support,  French

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Zone dépressionnaire présentant une convection renforcée et une circulation tourbillonnaire dans laquelle les vents n'excèdent pas 50 km/h (force 6 Beaufort).  2, record 8, French, - perturbation%20tropicale

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Dans un sens beaucoup plus précis, il arrive qu'une perturbation atmosphérique dénomme les conditions météorologiques régnant sur une région où apparaissent les signes de développement d'une circulation du vent associée à une faible dépression. En particulier, une perturbation tropicale (qui ne s'accompagne en surface que de vents faibles) s'oppose à une dépression tropicale (où le vent s'inscrit déjà dans une circulation bien caractérisée et où sa vitesse moyenne peut aller jusqu'à 33 nœuds, soit 61 km/h), à une tempête tropicale (où le maximum de cette vitesse moyenne se place entre 34 et 63 nœuds, soit un intervalle de 62 à 117 km/h) et à un cyclone tropical (où ce maximum est au moins de 64 nœuds, soit 118 km/h).  3, record 8, French, - perturbation%20tropicale

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perturbation tropicale : vents de surface légers et indices de circulation cyclonique.  4, record 8, French, - perturbation%20tropicale

Record 8,  Textual support,  Spanish

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Perturbación tropical: Vientos de superficie ligeros con indicios de circulación ciclónica.  1, record 8, Spanish, - perturbaci%C3%B3n%20tropical

Record 9,  Textual support,  English

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An air pressure wave which moves ahead of the main blast wave for some distance as a result of a nuclear explosion of appropriate yield and low burst height over a heat-absorbing(or dusty) surface. The pressure at the precursor front increases more gradually than in a true(or ideal) shock wave, so that the behaviour in the precursor region is said to be non-ideal.  2, record 9, English, - precursor%20front

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precursor front: term and definition standardized by NATO.  3, record 9, English, - precursor%20front

Record 9,  Textual support,  French

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Front de pression qui précède le front principal. Il est provoqué lors d'une explosion nucléaire d'une certaine puissance, à basse altitude au-dessus d'une surface thermo-absorbante (par exemple poussiéreuse). La pression sur le front précurseur augmente plus progressivement que celle d'une onde de choc théorique, aussi dit-on que les conditions au voisinage du front précurseur ne sont pas conformes au modèle calculé.  2, record 9, French, - front%20de%20pression%20pr%C3%A9curseur

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front de pression précurseur : terme et définition normalisés par l'OTAN.  3, record 9, French, - front%20de%20pression%20pr%C3%A9curseur

Record 9,  Textual support,  Spanish

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Onda de presión en el aire que precede a la onda de choque principal. Se forma como resultado de una explosión nuclear de determinada potencia a baja altura. A medida que avanza forma una superficie que absorbe calor (o polvo). La presión del frente previo aumenta de forma más regular que la onda de choque teórica, de manera que se puede decir que su comportamiento no es el ideal.  1, record 9, Spanish, - frente%20previo%20de%20presi%C3%B3n

Record 10,  Textual support,  English

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The mound of water spray thrown up into the air when the shock wave from an underwater detonation of a nuclear weapon reaches the surface.  1, record 10, English, - dome

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spray dome; dome : terms and definition standardized by NATO.  3, record 10, English, - dome

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Soulèvement d'eau et d'écume provoqué par l'onde de choc d'une explosion nucléaire sous-marine lorsqu'elle atteint la surface de l'eau.  1, record 10, French, - d%C3%B4me

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dôme d'écume; dôme : termes et définition normalisés par l'OTAN.  3, record 10, French, - d%C3%B4me

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Masa de gotas de agua lanzada al aire cuando la onda de choque de una explosión nuclear submarina alcanza la superficie.  1, record 10, Spanish, - c%C3%BApula

Record 11,  Textual support,  English

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The unreflected pressure, in excess of the ambient atmospheric pressure, created in the air by the blast wave from an explosion.  2, record 11, English, - free%20air%20overpressure

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free air overpressure: term and definition standardized by NATO.  3, record 11, English, - free%20air%20overpressure

Record 11,  Textual support,  French

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Pression, supérieure à la pression atmosphérique ambiante, due exclusivement à l'onde de choc incidente créée dans l'air par une explosion nucléaire.  2, record 11, French, - surpression%20incidente

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surpression incidente : terme et définition normalisés par l'OTAN.  3, record 11, French, - surpression%20incidente

Record 11,  Textual support,  Spanish

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La presión no reflejada que sobrepasa la presión atmosférica ambiental, creada en el aire por la onda de choque de una explosión.  1, record 11, Spanish, - sobrepresi%C3%B3n%20al%20aire%20libre

Record 12,  Textual support,  English

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A card used by the referee to indicate that a player is being ejected from a game.  2, record 12, English, - red%20card

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When the referee ejects a player from the game, he will call the player to him, enter his name in his notebook, then wave a red card in the air, indicating to everyone that the player is being sent off the field. The player's name is sent on to the appropriate disciplinary authorities.  3, record 12, English, - red%20card

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Submitted by the event’s judges, a red card [in race walking] signifies a violation against the athlete’s form. When three red cards from three different judges have been sent to the chief judge on the same athlete, the athlete is disqualified.  4, record 12, English, - red%20card

Record 12,  Textual support,  French

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Plaque de carton qui permet à l'arbitre de signaler une expulsion.  2, record 12, French, - carton%20rouge

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Remis par le juge de l’épreuve [de marche] pour signaler une faute de forme de l’athlète. Lorsque le juge en chef reçoit trois cartons rouges de trois juges différents au sujet du même ahtlète, l’athlète en question est disqualifié.  3, record 12, French, - carton%20rouge

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Presentada por los jueces del evento [de marcha], una tarjeta roja significa que el atleta ha cometido una infracción por su forma de marchar. Cuando tres tarjetas rojas de tres jueces diferentes hayan sido enviadas al juez jefe, el atleta será descalificado.  3, record 12, Spanish, - tarjeta%20roja

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tarjeta roja; tarjeta de expulsión: términos utilizados en fútbol.  4, record 12, Spanish, - tarjeta%20roja

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tarjeta roja: término utilizado en voleibol, hockey sobre hierba, los deportes de patines sobre ruedas y marcha atlética.  4, record 12, Spanish, - tarjeta%20roja

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Among ingenious precautions invented in the 19th century to avoid accidental live burial were attaching bells to corpses, installing speaking tubes and air tubes in coffins, and providing a flag a victim could wave in distress.  2, record 13, English, - unintentional%20live%20burial

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La taphophobie ou crainte d’être enterré vivant est parmi les plus anciennes peurs connues de l’être humain. La torture des inhumations volontaires était autrefois infligée par les Romains ou les empereurs de Chine les plus cruels. Quant aux inhumations involontaires, même si quelques cas ont été révélés, elles sont heureusement des plus rares aujourd’hui.  1, record 13, French, - inhumation%20involontaire

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Record 14,  Textual support,  English

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Moored buoys are the weather sentinels of the sea. They are deployed in the coastal and offshore waters... moored buoys measure and transmit barometric pressure; wind direction, speed, and gust; air and sea temperature; and wave energy spectra from which significant wave height, dominant wave period, and average wave period are derived. Even the direction of wave propagation is measured on many moored buoys.  2, record 14, English, - moored%20buoy

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Record 15,  Textual support,  English

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tropical wave : A kink or bend in the normally straight flow of surface air in the tropics which forms a low pressure trough, or pressure boundary, with showers and thunderstorms. Can develop into a tropical cyclone.  1, record 15, English, - develop

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onde tropicale : Courbe dans l'écoulement normalement droit de l'air de surface sous les tropiques, qui forme un creux de basse pression accompagné d'averses et d'orages. Elle peut se transformer en cyclone tropical.  1, record 15, French, - se%20transformer

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Record 16,  Textual support,  English

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tropical wave : A kink or bend in the normally straight flow of surface air in the tropics which forms a low pressure trough, or pressure boundary, with showers and thunderstorms.  1, record 16, English, - straight%20flow

Record 16,  Textual support,  French

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onde tropicale : Courbe dans l'écoulement normalement droit de l'air de surface sous les tropiques, qui forme un creux de basse pression accompagné d'averses et d'orages.  1, record 16, French, - %C3%A9coulement%20droit

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Record 17,  Textual support,  English

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A region of abrupt change in pressure and density moving ahead of the aircraft as a wave front at or above the speed of sound.  2, record 17, English, - shock%20wave

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... a shock wave ... can result not only from an explosion but is also emitted from an object like a missile or jet airplane moving faster than the velocity of sound.  3, record 17, English, - shock%20wave

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shock wave : term standardized by ISO; term and definition standardized by the Glossary for Pilots and Air Traffic Services Personnel Committee.  4, record 17, English, - shock%20wave

Record 17,  Textual support,  French

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Région à l'avant de l'aéronef qui fait l'objet d'un changement brusque de pression et de densité et qui se déplace comme un front d'onde à une vitesse égale ou supérieure à celle du son.  2, record 17, French, - onde%20de%20choc

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onde de choc : terme normalisé par l'ISO; terme et définition normalisés par le Comité sur le Glossaire à l'intention des pilotes et du personnel des services de la circulation aérienne.  3, record 17, French, - onde%20de%20choc

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Record 18,  Textual support,  English

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A fully developed compression wave of large amplitude, across which density, pressure, and particle velocity change drastically.  2, record 18, English, - shock%20wave

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The wave sent out through the air by the discharge of the shot initiating an explosion. This wave travels with the velocity of sound...  2, record 18, English, - shock%20wave

Record 18,  Textual support,  French

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La vitesse avec laquelle s'opère le transfert d'énergie d'activation entre produits de décomposition et molécules non décomposées donc la vitesse avec laquelle une substance se décompose, amène à distinguer : - les substances dont la vitesse de décomposition est relativement faible et [...] les substances dont la vitesse de décomposition est extrêmement élevée et qui sont désignées sous le nom d'«explosifs détonants, ou brisants», leur décomposition appelée détonation se propageant dans la masse entière de la substance sous l'apparence d'une onde de choc, qui s'accompagne d'effets mécaniques destructeurs.  2, record 18, French, - onde%20de%20choc

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Record 19,  Textual support,  English

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A system for harvesting the energy of waves (swell) in the shape of an on-shore barrier that retains and directs the water in a reservoir linked with a turbine for the production of electricity.  3, record 19, English, - wave%20energy%20breakwater

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Energetech Australia is building a prototype electricity generator based on wave power on the breakwater at Port Kembla in New South Wales. A submerged chamber is open below the water level. When the waves rise up around the chamber, the water inside the chamber rises and falls with the waves. This compresses and decompresses air above the water in the chamber, creating airflow which drives a turbine. The turbines work with the air flowing in both directions. The blades change angle, depending on the speed and direction of the airflow … An ocean wall in the shape of a parabola concentrates the wave energy onto a central point where the power station is located … The amount of converted energy depends on the wind speed, the time the wind blows over the waves, and the distance it covers. During a wave's voyage, it shapes into a more regular wave, commonly referred to as a swell. At ocean shores, swells are very regular and discernable, even when the sea is calm.  1, record 19, English, - wave%20energy%20breakwater

Record 19,  Textual support,  French

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Générateurs utilisant la houle […] La houle, dont l’origine se trouve dans les vents, représente un immense gisement d’énergie. Les puissances disponibles s’expriment par unité de longueur de front de vague et atteignent quelques 10 kW [kilowatts]/m. [Parmi les] principaux dispositifs exploitant l’énergie des vagues [on trouve les] barrages à houle situés sur les côtes; par déferlement, l’eau de mer remplit un réservoir et est ensuite turbinée. Ces systèmes présentent l’avantage de lisser la puissance et d’obtenir une production relativement régulière, en tout cas, qui ne fluctue pas au rythme des vagues, mais ils occupent de l’espace sur les côtes […]  1, record 19, French, - barrage%20%C3%A0%20houle

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Record 20,  Textual support,  English

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A system that converts ocean wave energy into electric energy.  3, record 20, English, - Archimedes%20Wave%20Swing%20system

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[The AWS system] consists of a hollow, pressurized steel structure, the upper part of which is initiated to heave motions by the periodic changing of hydrostatic pressure beneath a wave. Being submerged, the device is characterized by low visual and acoustic impact.  4, record 20, English, - Archimedes%20Wave%20Swing%20system

Record number: 20, Textual support number: 2 OBS

If a wave is above the floater, the volume is reduced by the water pressure, and if a wave trough is above the AWS, the air pressure inside the floater moves up because of the air pressure inside.  5, record 20, English, - Archimedes%20Wave%20Swing%20system

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The Archimedes Wave Swing (AWS), was originally developed by Teamwork Technology BV (NL), the rights are now owned by AWS Ocean Energy LTD (UK).  4, record 20, English, - Archimedes%20Wave%20Swing%20system

Record 20,  Textual support,  French

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Générateurs utilisant la houle […] La houle, dont l’origine se trouve dans les vents, représente un immense gisement d’énergie. Les puissances disponibles s’expriment par unité de longueur de front de vague et atteignent quelques 10 kW [kilowatts]/m. [Parmi les] principaux dispositifs exploitant l’énergie des vagues [on trouve le] système à flotteur immergé; une partie fixe du système est ancrée et une partie mobile sollicitée par la poussée d’Archimède subit les ondulations de pression hydrauliques de la houle et oscille […] Le système AWS (Archimedes Wave Swing) […] Chaque unité de production se trouve immergée à 8 m sous la surface. Un flotteur, de 21 m de hauteur et 9,5 m de diamètre, actionne un piston et entraîne un générateur linéaire synchrone d’une puissance de 2 MW [mégawatts]. Le flotteur est mis en résonance par les vagues; ainsi, une amplitude de houle de 1 m [mètre] peut donner des mouvements de 7 m.  1, record 20, French, - syst%C3%A8me%20AWS

Record 20,  Textual support,  Spanish

Record 21,  Textual support,  English

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A particularly sensitive and accurate type of hygrometer has been developed in recent years by the Instrument Division of the U. S. Weather Bureau. The device, known as the infrared hygrometer, employs a beam of infrared light projected through the air to a photo-electric detector. Two separate wave lengths of light are used; one is absorbed by water vapor and the other passes through undiminished. The ratio of the infrared light transmitted by the different wave lengths is a direct indication of the amount of water vapor in the light path.  1, record 21, English, - infrared%20hygrometer

Record 21,  Textual support,  French

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L'un des meilleurs hygromètres, mais aussi le plus coûteux, mesure sur un trajet optique de l'ordre du mètre le rapport d'une raie d'absorption intense de la vapeur d'eau dans l'infrarouge moyen à celle d'une bande très voisine non absorbée.  2, record 21, French, - hygrom%C3%A8tre%20infrarouge

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Record 22,  Textual support,  English

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In the homogeneous equilibrium model (HEM) one assumes that the velocity, temperature and pressure between the phases or components are equal.  1, record 22, English, - homogeneous%20equilibrium%20model

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This assumption is based on the belief that differences in these three potential variables(and chemical potential if chemical reactions are considered) will promote momentum, energy, and mass transfer between the phases rapidly enough so that equilibrium is reached. For example, when one phase is finely dispersed in another phase generating large interfacial area, under certain circumstances this assumption can be made; e. g., bubbly flow of air in water or steam in water at high pressures. The resulting equations resemble those for a pseudo-fluid with mixture properties and an equation of state which links the phases to obtain these mixture thermodynamic properties. Whenever the HEM model is used it is advisable to check the validity of the equilibrium assumptions by using more accurate theoretical models for comparison. For example, rapid acceleration or pressure changes cannot be always accurately modelled with the HEM model; i. e., discharge of flashing vapor-liquid mixtures, or shock wave propagation through a multiphase medium. This is especially true when the pressure change is large when compared to the ambient pressure, or any of the driving potentials are large relative to their reference values.  1, record 22, English, - homogeneous%20equilibrium%20model

Record 22,  Textual support,  French

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Les écoulements à direction privilégiée peuvent soit être considérés comme monodimensionnels, soit conduire à des équations simplifiées en ne considérant que les termes prédominants. Le modèle le plus simple revient à homogénéiser les deux phases en considérant un fluide dont les propriétés physiques sont déterminées par le taux de présence des deux phases. En écoulement à direction privilégiée (vertical ascendant), les deux phases étant en équilibre thermodynamique et mécanique, le modèle homogène à l'équilibre (HEM) se révèle satisfaisant et particulièrement utile. À partir de ce modèle, on peut introduire des effets de glissement ou de déséquilibre thermique (apparition de vapeur lorsque le fluide n'est pas encore à saturation).  1, record 22, French, - mod%C3%A8le%20homog%C3%A8ne%20%C3%A0%20l%27%C3%A9quilibre

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Record 23,  Textual support,  English

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The air pressure wave which may precede(or accompany) an avalanche.  6, record 23, English, - air%20blast

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Destruction from avalanches results both from the avalanche wind (the air pushed ahead of the mass) and from the actual impact of the avalanche material.  7, record 23, English, - air%20blast

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[Powder snow] avalanches composed of dry snow usually generate a dust cloud as the sliding snow is whirled into the air ... Their speed may exceed 200 km/hr. ... Under certain circumstances, enough snow crystals are mixed with the air to form an aerosol which behaves as a sharply bounded body of dense gas rushing down the slope ahead of the sliding snow. This wind blast can inflict heavy destruction well beyond the normal bounds of the avalanche track.  8, record 23, English, - air%20blast

Record number: 23, Textual support number: 3 CONT

Some slides, particularly large ones, appear to be preceded by an air blast or pressure wave. Destructive air blasts are not common. However, there are certain paths where the phenomena occurs regularly. When it does occur the air blast may extend about 100 meters beyond a major path.  5, record 23, English, - air%20blast

Record number: 23, Textual support number: 4 CONT

Damage to trees from the avalanche was caused by the air blast. [Example approved by the Avalanche Bulletin Terminology Standardization Committee.]  9, record 23, English, - air%20blast

Record number: 23, Textual support number: 1 OBS

Sometimes reference is made to a shock wave. This is misleading since the air blast is not a true shock wave.  5, record 23, English, - air%20blast

Record number: 23, Textual support number: 2 OBS

The most destructive form [of an avalanche wind is] the avalanche blast. It occurs when an avalanche is stopped abruptly, as in the case of an almost vertical fall into a valley floor.  10, record 23, English, - air%20blast

Record number: 23, Textual support number: 3 OBS

air blast; wind blast: terms officially approved by the Avalanche Bulletin Terminology Standardization Committee.  11, record 23, English, - air%20blast

Record 23,  Textual support,  French

Record number: 23, Textual support number: 1 DEF

Souffle précédant le front de l'avalanche (en général mixte ou en aérosol).  4, record 23, French, - vent%20d%27avalanche

Record number: 23, Textual support number: 1 CONT

Une avalanche en aérosol est un écoulement turbulent résultant de la suspension de particules de neige dans l'air, il ressemble à un gros nuage de neige se déplaçant à très grande vitesse. Il est précédé d'environ une centaine de mètres par un écoulement d'air (sans entraînement de cristaux) appelé vent ou souffle de l'avalanche. La pression de ce souffle est faible, de l'ordre de 5 kN/m², mais peut être suffisant pour provoquer des dégâts (arbres, toitures, etc.).  4, record 23, French, - vent%20d%27avalanche

Record number: 23, Textual support number: 2 CONT

Le vent d'avalanche a endommagé les arbres. [Exemple entériné par le Comité d'uniformisation de la terminologie des bulletins d'avalanche.]  5, record 23, French, - vent%20d%27avalanche

Record number: 23, Textual support number: 1 OBS

vent d'avalanche; souffle de l'avalanche; souffle : termes uniformisés par le Comité d'uniformisation de la terminologie des bulletins d'avalanche.  6, record 23, French, - vent%20d%27avalanche

Record 23,  Textual support,  Spanish

Record 24,  Textual support,  English

Record number: 24, Textual support number: 1 DEF

Sound that reaches the point of interest by propagation through air. (ASTM E-90).  3, record 24, English, - airborne%20sound

Record number: 24, Textual support number: 1 CONT

This chapter considers the insulation provided by various partition elements(walls, floors, windows, and doors) against airborne sound, i. e., sound that originates as a wave in the air around the source.  4, record 24, English, - airborne%20sound

Record number: 24, Textual support number: 1 PHR

Insulation against airborne sound.  5, record 24, English, - airborne%20sound

Record 24,  Textual support,  French

Record number: 24, Textual support number: 1 DEF

Son transmis par la propagation dans l'air.  1, record 24, French, - son%20a%C3%A9rien

Record number: 24, Textual support number: 1 OBS

Exemples : le son de la voix, d'un téléviseur ou d'un saxophone.  1, record 24, French, - son%20a%C3%A9rien

Record 24,  Textual support,  Spanish

Record 25,  Textual support,  English

Record number: 25, Textual support number: 1 CONT

Kelvin-Helmholtz wave clouds are formed when there are two parallel layers of air that are usually moving at different speeds and in opposite directions. The upper layer of air usually moves faster than the lower layer because there is less friction. In order for us to see this shear layer, there must be enough water vapor in the air for a cloud to form. Even if clouds are not present to reveal the shear layer, pilots need to be aware of invisible atmospheric phenomenon.... The Kelvin-Helmholtz wave cloud does not last very long because the upper layer of air is usually drier than the lower layer, which results in evaporation of the cloud.  3, record 25, English, - Kelvin%2DHelmholtz%20wave%20cloud

Record number: 25, Textual support number: 2 CONT

Cattails below and Kelvin-Helmholtz wave clouds above - the clouds are formed by wind shear and any planes flying nearby would likely feel a few moderate bumps of turbulence.  4, record 25, English, - Kelvin%2DHelmholtz%20wave%20cloud

Record number: 25, Textual support number: 3 CONT

Another "specialty" cloud is one that can develop due to Kelvin-Helmholtz (K-H) instability waves and subharmonic resonance with other waves in the atmosphere. This can result in an intertwined or spiral cloud pattern ... K-H clouds that form in early stages can resemble well-organized waves that appear to be breaking like ocean waves.  2, record 25, English, - Kelvin%2DHelmholtz%20wave%20cloud

Record 25,  Textual support,  French

Record number: 25, Textual support number: 1 OBS

[...] l'élément intéressant sur cette photo, c'est ce petit cortège de nuages «dédoublés» [...] La forme allongée et plus ou moins enroulée de leur sommet, telle de petites vagues déferlant, est la conséquence d'une différence importante de la force du vent entre deux altitudes très proches. Ainsi les têtes tendent à se détacher des bases, soufflées par un vent plus fort, tout en s'enroulant sur elles-mêmes. Ce phénomène [est] appelé ondes de Kelvin-Helmholtz [...]  2, record 25, French, - nuage%20form%C3%A9%20par%20l%27effet%20des%20ondes%20de%20Kelvin%2DHelmholtz

Record 25,  Textual support,  Spanish

Record 26,  Textual support,  English

Record number: 26, Textual support number: 1 DEF

Wave in the atmospheric circulation, in one of the principal zones of the westerly winds, characterized by a great length and a significant amplitude.  5, record 26, English, - long%20wave

Record number: 26, Textual support number: 1 CONT

The jet streams, especially the polar front jet streams, are very dynamic features, which exhibit long wavelength meanders known as "long waves" or "planetary waves". These are also commonly known as "Rossby waves" ... Strictly speaking, Rossby waves are a particular kind of long wave, which migrates upstream relative to the fluid flow (i.e. from east to west in the case of the sub-tropical and polar jet streams). In fact, planetary waves may be stationary or migrate slowly eastward or westward.  6, record 26, English, - long%20wave

Record number: 26, Textual support number: 2 CONT

Long wave is a synoptic scale, natural wave pattern in the westerlies. They are also called "Rossby Waves" or "Planetary Waves". Long waves separate cold Polar air from warm air at the Equator and are caused by the shape and rotation of the Earth.... The wavelength of long waves may vary from 60 to 180 degrees of longitude.... There are usually three(3) to six(6) long waves in the westerlies in each hemisphere during any given season.... The speed that long waves move at is generally very slow, 1-3 degrees longitude a day.  7, record 26, English, - long%20wave

Record number: 26, Textual support number: 3 CONT

Long wave [is] a large wave in the polar jet stream and the westerlies that extends from the middle to the upper troposphere. Often associated with the formation of a mid-latitude cyclone at the ground surface. ... Also called Rossby waves.  8, record 26, English, - long%20wave

Record number: 26, Textual support number: 1 OBS

The wave length is typically longer than that of the rapidly moving individual cyclonic and anticyclonic disturbances of the lower troposphere. The angular wavenumber of long waves is generally taken to be from 1 to 5.  9, record 26, English, - long%20wave

Record 26,  Textual support,  French

Record number: 26, Textual support number: 1 DEF

Onde de la circulation atmosphérique dans une des zones principales de vent d'ouest, caractérisée par une grande longueur d'onde et une amplitude significative.  4, record 26, French, - onde%20de%20Rossby

Record number: 26, Textual support number: 1 CONT

[...] la circulation aux latitudes moyennes est caractérisée par des séquences transitoires creux-crête-creux-onde très importantes. C'est ce qu'on appelle les «ondes de Rossby», d'après Carl-Gustave Rossby, qui a élaboré sa théorie en 1937. Les ondes de Rossby sont principalement inclinées du nord-est au sud-ouest dans l'hémisphère Nord. [...] Les ondes planétaires sont les ondes de Rossby [...] Les crêtes ont tendance à se former au-dessus de grandes chaînes de montagne, comme les Rocheuses, et au-dessus de surfaces constamment chaudes. Les creux ont tendance à se former en aval des chaînes de montagne et au-dessus de surfaces froides.  5, record 26, French, - onde%20de%20Rossby

Record number: 26, Textual support number: 2 CONT

[...] des constituants majeurs, comme l'ozone, admettent leurs sources et leurs puits dans la moyenne atmosphère, alors que le transport et le mélange des masses d'air et des constituants chimiques y sont contrôlés par la propagation des ondes de grandes échelles, comme les ondes planétaires de Rossby, et par des ondes de petites échelles comme les ondes de gravité et la turbulence.  2, record 26, French, - onde%20de%20Rossby

Record 26,  Textual support,  Spanish

Record number: 26, Textual support number: 1 DEF

Onda en la circulación de la atmósfera en una de las zonas principales de los vientos del oeste, caracterizada por una gran longitud de onda y una amplitud notable.  1, record 26, Spanish, - onda%20larga

Record 27,  Textual support,  English

Record number: 27, Textual support number: 1 DEF

Spherical compression wave or reaction of the air in front of the muzzle of a firearm immediately after firing.  1, record 27, English, - muzzle%20wave

Record 27,  Textual support,  French

Record number: 27, Textual support number: 1 DEF

Onde sphérique de compression ou de déplacement de l'air en avant de la bouche d'une arme à feu immédiatement après le tir.  1, record 27, French, - onde%20de%20bouche

Record number: 27, Textual support number: 1 OBS

onde de bouche : terme et définition uniformisés par le Groupe de travail de terminologie des armes légères.  2, record 27, French, - onde%20de%20bouche

Record 27,  Textual support,  Spanish

Record 28,  Textual support,  English

Record number: 28, Textual support number: 1 CONT

Raytheon's IMS [Integrated Maritime Surveillance] uses land-based long-range surface wave radar, which transmits high frequency(HF) radio waves that follow the earth's curvature. The SWR-503 Surface Wave Radar detects and tracks aircraft, surface vessels and icebergs out to 500 km from the shore in a sector of up to 120 degrees. The radar also provides current and surface wind data. At an Operations Control Centre, the IMS system correlates detections from surface wave radar sites with identification information from ADS systems and other sensors. All of this data is fused to create a database and display system providing a complete picture of surface and air activity in the EEZ. Vessel tracks can be run backward and forward in time, enhancing military patrols and coast guard search-and-rescue efforts as well as oil spill control, drug interdiction, and iceberg alerts. Applications for HF Surface Wave Radar are being developed in fields such as Theatre Ballistic Missile and Meteor Shower Detection.  5, record 28, English, - high%2Dfrequency%20surface%20wave%20radar

Record 28,  Textual support,  French

Record number: 28, Textual support number: 1 CONT

Un radar haute fréquence à ondes de surface (RHFOS) ultraperfectionné que Raytheon Canada Limited (RCL) a conçu afin de détecter la présence de petits navires et d'aéronefs volant à basse altitude a été présenté avec succès à la Drug Enforcement Agency des États-Unis.  2, record 28, French, - radar%20haute%20fr%C3%A9quence%20%C3%A0%20ondes%20de%20surface

Record 28,  Textual support,  Spanish

Record 29,  Textual support,  English

Record number: 29, Textual support number: 1 DEF

Wave motion of the air, in which the troughs and crests remain stationary and which is produced in certain conditions of stability and of wind speed above and downwind from a mountain ridge.  3, record 29, English, - standing%20wave

Record 29,  Textual support,  French

Record number: 29, Textual support number: 1 DEF

Mouvement ondulatoire de l'air dans lequel les creux et les crêtes demeurent sensiblement stationnaires; il se produit dans certaines conditions de stabilité et de vitesse du vent au-dessus et en aval d'une crête montagneuse.  2, record 29, French, - onde%20stationnaire

Record 29,  Textual support,  Spanish

Record number: 29, Textual support number: 1 DEF

Movimientos ondulatorios del aire en que senos y crestas permanecen estacionarios. Se producen en ciertas condiciones de estabilidad y de velocidad del viento sobre y a sotavento de una cordillera.  2, record 29, Spanish, - onda%20estacionaria

Record 30,  Textual support,  English

Record number: 30, Textual support number: 1 DEF

Induced wave which forms on the tropopause probably as a result of air movements related to cyclonic activity.  2, record 30, English, - tropopause%20wave

Record 30,  Textual support,  French

Record number: 30, Textual support number: 1 DEF

Onde induite qui se produit sur la tropopause, probablement causée par les mouvements de l'air associés à l'activité cyclonique.  2, record 30, French, - onde%20de%20la%20tropopause

Record 30,  Textual support,  Spanish

Record number: 30, Textual support number: 1 DEF

Onda inducida que se forma en la tropopausa, probablemente debida al movimiento de aire asociado con la actividad ciclónica.  1, record 30, Spanish, - onda%20de%20la%20tropopausa

Record 31,  Textual support,  English

Record number: 31, Textual support number: 1 DEF

Ensemble of water droplets torn by the wind from the surface of an extensive body of water, generally from the wave crests, and carried up a short distance into the air.  5, record 31, English, - spray

Record 31,  Textual support,  French

Record number: 31, Textual support number: 1 DEF

Ensemble de gouttelettes d'eau arrachées par le vent à la surface d'une vaste étendue d'eau, notamment aux crêtes des vagues, et emporté sur plusieurs kilomètres dans l'atmosphère.  2, record 31, French, - embruns

Record number: 31, Textual support number: 1 CONT

Les vagues écrêtées par le vent donnent des embruns.  3, record 31, French, - embruns

Record number: 31, Textual support number: 1 OBS

embruns : terme rarement utilisé au singulier (embrun).  4, record 31, French, - embruns

Record 31,  Textual support,  Spanish

Record number: 31, Textual support number: 1 DEF

Conjunto de gotitas de agua arrancadas por el viento de la superficie de una gran extensión de agua, generalmente de las crestas de las olas, y transportadas en la atmósfera a una distancia corta.  4, record 31, Spanish, - roc%C3%ADo%20del%20mar

Record 32,  Textual support,  English

Record number: 32, Textual support number: 1 DEF

Dry, dust-laden wind, which blows from the desert in Egypt and over the Red Sea.  3, record 32, English, - khamsin

Record number: 32, Textual support number: 1 OBS

It is generally southerly or southeasterly, occurring in front of depressions moving eastward across North Africa or the southeastern Mediterranean. The deep khamsins occur in spring with depressions traveling east-northeast across the northern Sahara. They are preceded by a heat wave lasting about three days and are followed by a duststorm. The passage of the depression is marked by a cold front bringing Mediterranean air and a sudden drop in temperature.  4, record 32, English, - khamsin

Record 32,  Textual support,  French

Record number: 32, Textual support number: 1 DEF

Vent sec, chargé de poussière, qui souffle du désert en Égypte et sur la mer Rouge.  3, record 32, French, - khamsin

Record number: 32, Textual support number: 1 OBS

Il souffle généralement du sud ou du sud-est, en avant des dépressions qui se meuvent vers l'est à travers l'Afrique du Nord ou la Méditerranée du Sud-Est.  2, record 32, French, - khamsin

Record 32,  Textual support,  Spanish

Record number: 32, Textual support number: 1 DEF

En Egipto y el mar Rojo, un viento seco y cargado de polvo que sopla del desierto.  2, record 32, Spanish, - khamsin

Record 33,  Textual support,  English

Record number: 33, Textual support number: 1 DEF

In a progressive or standing sound wave, the longitudinal alternating velocity of the air or fluid particles, taken either as the maximum or r. m. s. velocity.  2, record 33, English, - particle%20velocity

Record number: 33, Textual support number: 1 CONT

the measurable aspects of sound in common use are: particle displacement; particle velocity; particle acceleration; sound pressure  3, record 33, English, - particle%20velocity

Record 33,  Textual support,  French

Record number: 33, Textual support number: 1 DEF

Dérivée géométrique par rapport au temps du déplacement d'une particule.  4, record 33, French, - vitesse%20acoustique%20d%27une%20particule

Record number: 33, Textual support number: 1 OBS

vitesse acoustique; vitesse d'une particule : termes normalisés par l'AFNOR.  1, record 33, French, - vitesse%20acoustique%20d%27une%20particule

Record 33,  Textual support,  Spanish

Record number: 33, Textual support number: 1 DEF

Variación de la elongación acústica con el tiempo.  1, record 33, Spanish, - velocidad%20ac%C3%BAstica

Record 34,  Textual support,  English

Record number: 34, Textual support number: 1 DEF

Wave motion of the air above the region of foehn development.  2, record 34, English, - foehn%20wave

Record 34,  Textual support,  French

Record number: 34, Textual support number: 1 DEF

Mouvement ondulatoire de l'air au-dessus de la région de développement du foehn.  2, record 34, French, - onde%20de%20foehn

Record 34,  Textual support,  Spanish

Record number: 34, Textual support number: 1 DEF

Movimiento ondulatorio del aire sobre la región en que se está desarrollando el foehn.  1, record 34, Spanish, - onda%20del%20foehn

Record 35,  Textual support,  English

Record number: 35, Textual support number: 1 DEF

Normal propagating sound wave in which the motions of the relevant particles are in line with the direction of translation of energy.  3, record 35, English, - longitudinal%20wave

Record number: 35, Textual support number: 1 CONT

Sound in air propagates as a longitudinal wave.  4, record 35, English, - longitudinal%20wave

Record 35,  Textual support,  French

Record number: 35, Textual support number: 1 DEF

Onde dans laquelle la direction du déplacement des particules, en tout point du milieu, est perpendiculaire aux surfaces d'onde.  2, record 35, French, - onde%20longitudinale

Record number: 35, Textual support number: 1 OBS

onde longitudinale : terme et définition normalisés par l'AFNOR et reproduits avec son autorisation.  2, record 35, French, - onde%20longitudinale

Record 35,  Textual support,  Spanish

Record number: 35, Textual support number: 1 DEF

Onda en la que la magnitud física característica de la misma se encuentra en la dirección de propagación de la onda.  1, record 35, Spanish, - onda%20longitudinal

Record number: 35, Textual support number: 1 CONT

El sonido se propaga en el aire como una onda longitudinal.  1, record 35, Spanish, - onda%20longitudinal

Record 36,  Textual support,  English

Record number: 36, Textual support number: 1 CONT

Depressions can be shown to follow a life cycle-from Embryo through Maturity to Decay. The embryo depression begins as a wave on the Polar Front. The collision between air masses forces the warmer air to rise-the rotation of the earth imparts a spiral movement to the rising air. The upward movement results in the creation of a Low pressure region on the earth's surface. More air is drawn in and rises, deepening the depression.  1, record 36, English, - wave%20on%20the%20polar%20front

Record 36,  Textual support,  French

Record number: 36, Textual support number: 1 CONT

Chacune [des] perturbations [du front polaire] a pour origine une déformation en forme d'ondulation du front polaire, cette limite quasi continue séparant dans chaque hémisphère l'air froid et relativement sec d'origine subpolaire de l'air plus chaud et plus humide provenant des régions subtropicales. Une telle ondulation prend naissance (on dit qu'il y a frontogenèse), évolue, se déplace, avec en général, une composante Ouest-Est, et finalement disparaît (on parle de frontolyse), au cours d'une période de quelques jours pendant laquelle elle parcourt quelques milliers de kilomètres. À l'avant, dans le sens de son déplacement, se forme un front chaud [...] suivi par un front froid [...] Simultanément une circulation cyclonique s'amorce puis se développe au niveau de chaque ondulation modifiant considérablement le champ du vent dans les régions traversées et se traduisant souvent par des tempêtes.  1, record 36, French, - ondulation%20du%20front%20polaire

Record 36,  Textual support,  Spanish

Record 37,  Textual support,  English

Record number: 37, Textual support number: 1 DEF

Wave characterized by vertical displacements of stable air from the level of static equilibrium of this air.  3, record 37, English, - gravity%20wave

Record 37,  Textual support,  French

Record number: 37, Textual support number: 1 DEF

Onde caractérisée par des déplacements verticaux d'air stable à partir du niveau d'équilibre statique de cet air.  3, record 37, French, - onde%20de%20gravit%C3%A9

Record 37,  Textual support,  Spanish

Record number: 37, Textual support number: 1 DEF

Onda caracterizada por desplazamientos verticales de aire estable con respecto a su nivel de equilibrio estable.  1, record 37, Spanish, - onda%20de%20gravitaci%C3%B3n

Record 38,  Textual support,  English

Record number: 38, Textual support number: 1 DEF

The shock front formed by the fusion of the incident and reflected shock fronts from an explosion. The term is generally used with reference to a blast wave, propagated in the air, reflected at the surface of the earth. In the ideal case, the mach stem is perpendicular to the reflecting surface and slightly convex(forward).  1, record 38, English, - mach%20stem

Record number: 38, Textual support number: 1 OBS

mach front; mach stem: terms and definition standardized by NATO.  2, record 38, English, - mach%20stem

Record 38,  Textual support,  French

Record number: 38, Textual support number: 1 DEF

Front de choc formé par la fusion des fronts de choc incident et réfléchi, consécutifs à une explosion. Ce terme est généralement employé relativement à une onde de souffle propagée dans l'air et réfléchie par la surface de la terre. Dans le cas idéal, l'avant de l'onde de choc est perpendiculaire à la surface réfléchissante et légèrement convexe (vers l'avant).  1, record 38, French, - avant%20de%20l%27onde%20de%20choc

Record number: 38, Textual support number: 1 OBS

avant de l'onde de choc; front de mach : termes et définition normalisés par l'OTAN.  2, record 38, French, - avant%20de%20l%27onde%20de%20choc

Record 38,  Textual support,  Spanish

Record number: 38, Textual support number: 1 DEF

Es el frente de choque formado por la intersección de los frentes de onda incidente y reflejado procedentes de una explosión. El término se emplea generalmente con referencia a una onda procedente de una explosión, que se propaga en el aire reflejada en la superficie de la tierra. En el caso ideal el frente de mach es perpendicular a la superficie reflectante y ligeramente convexo (hacia adelante).  1, record 38, Spanish, - onda%20de%20mach

Record 39,  Textual support,  English

Record number: 39, Textual support number: 1 CONT

Waves are formed due to the friction of the wind over the water surface. The three main components for wave generation are the wind speed, it's duration and fetch.... How to recognise a swell/wave generating area. On a weather chart there are high and low pressure systems. They are separated by isobars(lines joining places of equal pressure). Buys Ballot's law states :"If you stand with your back to the wind in the northern hemisphere, the low pressure will be on your left. "From this you can deduce the wind flows anticlockwise around a low pressure system and almost parallel to the isobars. The wind near the surface actually flows at an angle of about 15 degrees to the isobars pointing in to the low. The reason for this is that friction with the surface slows the air down and it is this friction which causes waves to form. Assuming you have identified an area of closely packed isobars which are almost straight for 200 miles and the low system is not changing to quickly, you have found a good swell generating area.  3, record 39, English, - wave%20generation%20area

Record number: 39, Textual support number: 2 CONT

Wave generation area described in terms of fetch length ...  4, record 39, English, - wave%20generation%20area

Record number: 39, Textual support number: 1 OBS

fetch length: The horizontal distance (in the direction of the wind) over which a wind generates seas.  5, record 39, English, - wave%20generation%20area

Record 39,  Textual support,  French

Record number: 39, Textual support number: 1 DEF

Zone de l'océan sur laquelle les vents, soufflant dans la même direction pendant un temps plus ou moins long avec une force constante, engendrent une mer du vent dont les vagues sortent de l'aire et forment la houle.  2, record 39, French, - aire%20de%20g%C3%A9n%C3%A9ration%20de%20la%20houle

Record 39,  Textual support,  Spanish

Record 40,  Textual support,  English

Record number: 40, Textual support number: 1 DEF

An energy source extensively used in marine seismic surveys. Air under high pressure is abruptly released into the water to generate a seismic wave.  2, record 40, English, - air%20gun

Record number: 40, Textual support number: 1 OBS

As the gun is trailed behind a boat, air is released, making a low-frequency popping noise, which penetrates the subsurface rock layers and is reflected by the layers. Sensitive hydrophones receive the reflections and transmit them to recording equipment on the boat.  3, record 40, English, - air%20gun

Record number: 40, Textual support number: 2 OBS

Air guns have also been adapted for lowering in a borehole or pushed down into the marsh ... Air guns are also used in small tanks of water which are set on the surface of the ground as a seismic source on land.  4, record 40, English, - air%20gun

Record 40,  Textual support,  French

Record number: 40, Textual support number: 1 DEF

Source d'ondes acoustiques utilisé en sismique marine.  2, record 40, French, - canon%20%C3%A0%20air

Record number: 40, Textual support number: 1 CONT

Un navire de prospection pétrolière est équipé d'instruments [...] dont le canon à air, ou autre source d'ébranlement pour la sismique, immergé à l'arrière.  3, record 40, French, - canon%20%C3%A0%20air

Record number: 40, Textual support number: 2 CONT

Dans le canon à air le train d'ondes est obtenu par libération brutale de l'air comprimé dans l'eau [...]  2, record 40, French, - canon%20%C3%A0%20air

Record number: 40, Textual support number: 3 CONT

Le canon à air [...] utilise la détente brutale d'air comprimé sous une pression de 150 bar.  4, record 40, French, - canon%20%C3%A0%20air

Record number: 40, Textual support number: 1 OBS

[...] un des appareils les plus employés [...] Un volume d'air de l'ordre de 1,5 décilitre, fortement comprimé, est brutalement libéré dans l'eau et ce sont les oscillations de la bulle ainsi créée qui produisent le signal acoustique, la fréquence de résonance dépendant du volume de gaz, de sa pression initiale et de la profondeur d'immersion du canon.  5, record 40, French, - canon%20%C3%A0%20air

Record 40,  Textual support,  Spanish

Record 41,  Textual support,  English

Record number: 41, Textual support number: 1 DEF

Wave generated by variations in the atmosphere pressure which are propagated because of the compressibility of the air.  4, record 41, English, - compression%20wave

Record 41,  Textual support,  French

Record number: 41, Textual support number: 1 DEF

Onde engendrée par des variations de la pression atmosphérique qui se propagent en raison de la compressibilité de l'air.  3, record 41, French, - onde%20de%20compression

Record number: 41, Textual support number: 1 OBS

propagation des ondes.  4, record 41, French, - onde%20de%20compression

Record 41,  Textual support,  Spanish

Record number: 41, Textual support number: 1 DEF

Onda generada por variaciones de la presión atmosférica que se propagan a consecuencia de la compresibilidad del aire.  1, record 41, Spanish, - onda%20de%20compresibilidad

Record 42,  Textual support,  English

Record number: 42, Textual support number: 1 DEF

Pressure resulting from some medium in motion, such as the air following the shock front of a blast wave.  1, record 42, English, - dynamic%20pressure

Record number: 42, Textual support number: 1 OBS

dynamic pressure: term and definition standardized by NATO.  2, record 42, English, - dynamic%20pressure

Record 42,  Textual support,  French

Record number: 42, Textual support number: 1 DEF

Pression résultant du mouvement d'un milieu, par exemple le mouvement de l'air à l'arrivée d'une onde de choc.  1, record 42, French, - pression%20dynamique

Record number: 42, Textual support number: 1 OBS

pression dynamique: terme et définition normalisés par l'OTAN.  2, record 42, French, - pression%20dynamique

Record 42,  Textual support,  Spanish

Record number: 42, Textual support number: 1 DEF

Presión resultante de un medio en movimiento, como el aire que siguen al frente de choque de una onda explosiva.  1, record 42, Spanish, - presi%C3%B3n%20din%C3%A1mica

Record 43,  Textual support,  English

Record number: 43, Textual support number: 1 CONT

Both radio broadcasting and fiber optic systems require three essential elements : a transmitter, a transmission medium and a receiver. Instead of a radio wave transmitter and modulator to set the broadcast frequency and power the signal through the air, optical systems use modulators to establish an optical frequency, or channel, on a laser beam and feed it through a fiber. An optical frequency receiver then collects the messages, much in the manner of a radio set. And, just as tunable radio receivers let listeners select from among a number of stations, a tunable receiver for fiber optic communication is highly desirable.  2, record 43, English, - optical%20frequency

Record number: 43, Textual support number: 1 PHR

Quasi-optical frequency.  3, record 43, English, - optical%20frequency

Record 43,  Textual support,  French

Record number: 43, Textual support number: 1 CONT

Les études actuelles concernent la modélisation et la caractérisation de composants ou de fonctions optoélectroniques nouvelles pour les générations futures de systèmes optiques. Il s'agit notamment des systèmes de télécommunications à détection directe à grand produit débit x portée, des systèmes cohérents, tirant parti du gain en sensibilité de la détention homodyne ou hétérodyne, et des futurs réseaux monomodes à multiplexage en fréquence optique (réseaux «multicolores») exploitant également la sélectivité fréquentielle de ces techniques de détection, ou même encore des systèmes de télécommunications optiques spatiaux et des senseurs optiques.  2, record 43, French, - fr%C3%A9quence%20optique

Record number: 43, Textual support number: 1 PHR

Fréquence optique accordable.  3, record 43, French, - fr%C3%A9quence%20optique

Record 43,  Textual support,  Spanish

Record 44,  Textual support,  English

Record number: 44, Textual support number: 1 CONT

The A-car will receive not only a remote air cleaner housing and a resonator, but also a quarter-wave tuner. This is a tube mounted onto the air intake snorkel which reflects induction system sounds a half wave length out of phase to cancel any new sound waves.  1, record 44, English, - quarter%2Dwave%20tuner

Record 44,  Textual support,  French

Record 44,  Textual support,  Spanish

Record 45,  Textual support,  English

Record number: 45, Textual support number: 1 CONT

[The quarter-wave tuner] is a tube mounted onto the air intake snorkel which reflects induction system sounds a half wave length out of phase to cancel any new sound waves.  1, record 45, English, - air%20intake%20snorkel

Record 45,  Textual support,  French

Record 45,  Textual support,  Spanish

Record 46,  Textual support,  English

Record number: 46, Textual support number: 1 CONT

Short or segmented floats as well as cylindrical air chambers generally offer highest wave conformance capability.  1, record 46, English, - segmented%20float

Record 46,  Textual support,  French

Record number: 46, Textual support number: 1 CONT

Les flotteurs courts ou en segments ainsi que les flotteurs pneumatiques cylindriques ont, en général, une excellente tenue dans les vagues.  1, record 46, French, - flotteur%20en%20segments

Record 46,  Textual support,  Spanish

Record 47,  Textual support,  English

Record number: 47, Textual support number: 1 CONT

R. F. Power and V. S. W. R. Indicator Portable Tester... manufacturer :Air Canada. Use : To indicate forward or reflected power, when connected between transceiver and antenna.... [This] Tester is a device for measuring R. F. Power and Voltage Standing Wave Ratio(VSWR) of coaxial transmission lines. The tester when connected in series with the transmission line between the transmitter and the antenna will indicate the power transferred in the forward direction and the reflected power in the reverse direction. It has a frequency range of 0. 5 to 225 MHz.  3, record 47, English, - reflected%20forward%20power%20tester

Record 47,  Textual support,  French

Record number: 47, Textual support number: 1 OBS

appareil de mesure des puissances incidente et réfléchie : terme accepté par le Comité d'étude de la terminologie des cartes de travail du DC-9.  2, record 47, French, - appareil%20de%20mesure%20des%20puissances%20incidente%20et%20r%C3%A9fl%C3%A9chie

Record 47,  Textual support,  Spanish

Record 48,  Textual support,  English

Record number: 48, Textual support number: 1 DEF

one of the possible ways in which the air in a room, considered as an elastic body, will vibrate naturally when subjected to an acoustical disturbance. With each normal mode is associated a resonance frequency and, in general, a group of wave propagation directions comprising a closed path.  1, record 48, English, - normal%20mode%20of%20a%20room

Record 48,  Textual support,  French

Record number: 48, Textual support number: 1 DEF

(mode normal de vibration) : dans un local considéré comme un corps élastique, l'une des manières dont l'air ambiant vibre naturellement lorsqu'on le soumet à une perturbation acoustique. A chaque mode de résonance correspond une fréquence de résonance et, généralement, un ensemble de directions de propagation d'ondes formant un parcours fermé.  1, record 48, French, - r%C3%A9sonance%20propre%20d%27un%20local

Record 48,  Textual support,  Spanish

Record 49,  Textual support,  English

Record number: 49, Textual support number: 1 CONT

A sound wave in air or any fluid medium is... a compressional wave. The simplest example is the pressure pulse produced by the firing of a pistol... : it takes time for such a pulse to travel through the medium, and hence such a wave has a finite velocity.  1, record 49, English, - finite%20velocity

Record 49,  Textual support,  French

Record number: 49, Textual support number: 1 CONT

(...) le son se propage à une vitesse finie.  1, record 49, French, - vitesse%20finie

Record 49,  Textual support,  Spanish

Record 50,  Textual support,  English

Record number: 50, Textual support number: 1 DEF

... Large air bags sandwiched between a main structural floating spine and an outer hinged flap [which] are placed face-on to the prevailing sea.  1, record 50, English, - Lanchester%20clam

Record number: 50, Textual support number: 1 OBS

Waves push the flaps in forcing air out of the bags and through self-rectifying turbines. The air is in closed circuit returning to the bags when the flaps move out in wave troughs.  1, record 50, English, - Lanchester%20clam

Record 50,  Textual support,  French

Record 50,  Textual support,  Spanish

Record 51,  Textual support,  English

Record number: 51, Textual support number: 1 DEF

[a] buoy developed by Mr. Y. Masuda in Japan... divided into a large number of air chambers which are open at the bottom and from which air is displaced rhythmically by the wave action. The air is rectified by flap valves and used to produce power through a low pressure air turbine.  1, record 51, English, - air%20pressure%20ring%20buoy

Record 51,  Textual support,  French

Record 51,  Textual support,  Spanish