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CREST SPEED [3 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2024-01-04

English

Subject field(s)
  • Physics
  • Rail Transport
CONT

Crest speed or maximum speed. The crest speed is the maximum speed which affects the schedule speed of the train... If the crest speed of the train increases, the actual running time of it decreases, hence the high crest speed of the train will increase its schedule speed... Also, the effect of crest speed on the schedule speed is considered only for long run duration.

French

Domaine(s)
  • Physique
  • Transport par rail

Spanish

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Record 2 2012-10-19

English

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

This wave starts as a plunging, then the wave catches up with the crest, and the breaker surges up the beach face as a wall of water(with the wave crest and base traveling at the same speed). This results in a quickly rising and falling water level on the beach face, which makes holding craft position and unloading very difficult.

OBS

Surging breakers are usually found on a beach with a very steep or near vertical slope.

French

Domaine(s)
  • Océanographie
  • Hydrologie et hydrographie
OBS

[Un déferlement à gonflement est un] déferlement à la côte [...] pour lequel l'apparition d'écume a lieu à mi-hauteur de la vague [...] et se rencontrerait sur les plages à forte pente.

Spanish

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Record 3 2005-05-16

English

Subject field(s)
  • Atmospheric Physics
CONT

A summary of how wind is perturbed by a hill is catalogued below. 1. Winds : neutral thermal stratification : a. Maximum wind speed is near the crest. b. Minimum wind speed is in the valley. c. In the lee of the hill flow separation and reversed flow may occur. 2. Winds : stable thermal stratification :...

OBS

thermal stratification: The layering of different temperatures of ... air caused by different densities, less dense floating on more dense layers.

French

Domaine(s)
  • Physique de l'atmosphère
OBS

L'inversion de température [...] affecte les 50 premiers mètres de la troposphère. Avec la nuit, surtout en hiver, le sol se refroidit plus rapidement que les couches d'air. Au cours de la nuit les premières couches d'air vont peu à peu devenir plus froide que celle située au dessus, la stratification thermique (plus on monte, plus il fait froid) est donc inversée.

Spanish

Save record 3

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