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PROPAGATION PERFORMANCE [4 records]

Record 1 2000-03-07

English

Subject field(s)
  • Viticulture
  • Winemaking
CONT

After the individual mother vine selection scheme was introduced, only one vine with top performance was selected for propagation. With this individual mother vine selection system for reconstructing vineyards, average must yields in the German wine industry have increased from 3, 000 to 10, 400 L/ha in the past 100 years without altering wine quality. The individual mother vine selection scheme in Germany is a complex set of observations and replicated yield and quality test requiring 20 years to complete.

French

Domaine(s)
  • Viticulture
  • Industrie vinicole
CONT

Le matériel végétal nécessaire au bouturage et au greffage est produit : soit à partir des pieds-mères de porte-greffes [...] soit à partir de vignes-mères de greffons qui sont des vignes en production.

Spanish

Save record 1

Record 2 1996-05-23

English

Subject field(s)
  • Photoelectricity and Electron Optics
  • Optical Telecommunications
OBS

PMD arises from the fact that the so-called "single-mode" fibres are essentially bi-modal from a polarization point of view. The delay time between these two modes over propagation causes pulse broadening and intersymbol interference, resulting in system performance degradations.

OBS

fiber optics

French

Domaine(s)
  • Photo-électricité et optique électronique
  • Télécommunications optiques

Spanish

Save record 2

Record 3 1989-05-23

English

Subject field(s)
  • Blasting Work (Mining)
CONT

The second aspect of performance sensitivity is usually distinguished by the name of Propagation Sensitivity, which is a measure of the ability of an explosive to support or reinforce a detonation that has already been created. Since the tendency for the detonation wave to fail or fade increases as the hole diameter is reduced, it has become customary to measure propagation sensitivity by the(minimum) critical diameter of a charge at least six diameters long that will support the detonation process once created. At a point below this value, a detonation wave cannot be consistently propagated, and a misfire... may occur; or otherwise the reaction may be incomplete, resulting in a poor blast effect and significant fume.

French

Domaine(s)
  • Travail aux explosifs (Exploitation minière)
CONT

Sensibilité à l'onde explosive. C'est une caractéristique très importante car elle conditionne la transmission de la détonation dans une file de cartouches. La Commission de Normalisation a adopté comme critère le coefficient de transmission de détonation (CTD), (...) La sensibilité à l'onde explosive est fonction de la densité de l'explosif et de son état (pulvérulent, gélatineux, fondu). Quand la densité est trop élevée, surtout avec les explosifs nitratés, l'onde explosive provoquée par le détonateur peut ne pas agir, ou s'arrêter en cours de propagation : on a alors un raté, ou un culot d'explosif.

Spanish

Save record 3

Record 4 1988-10-26

English

Subject field(s)
  • Blasting Work (Mining)
CONT

The second aspect of performance sensitivity is usually distinguished by the name of Propagation Sensitivity, which is a measure of the ability of an explosive to support or reinforce a detonation that has already been created. Since the tendency for the detonation wave to fail or fade increases as the hole diameter is reduced, it has become customary to measure propagation sensitivity by the(minimum) critical diameter of a charge at least six diameters long that will support the detonation process once created. At a point below this value, a detonation wave cannot be consistently propagated, and a misfire... may occur; or otherwise the reaction may be incomplete, resulting in a poor blast effect and significant fume.

French

Domaine(s)
  • Travail aux explosifs (Exploitation minière)
DEF

Diamètre d'une charge cylindrique de substance explosive au-dessous duquel cette substance ne peut pas détoner.

Spanish

Save record 4

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