TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 DEF

An essentially impermeable membrane used with foundation, soil, rock, earth or any other geotechnical engineering-related material as an integral part of human-made project, structure, or system.  3, record 1, English, - geomembrane

Record number: 1, Textual support number: 1 CONT

Geomembranes are very low permeability membrane liners and barriers used with any geotechnical engineering based material so as to control fluid migration in a man-made project, structure or system.  2, record 1, English, - geomembrane

Record number: 1, Textual support number: 1 OBS

Geomembrane: The term liner applies when a geomembrane is used as an interface or a surface revetment. The term barrier is usually reserved for the cases where the geomembrane is used inside an earth mass. Geomembrane is a generic term which has been proposed to replace many terms such as: synthetic membranes, polymeric membranes, plastic liners, flexible membrane liners, impermeable membranes and impervious sheets. These terms are not appropriate because: (i) synthetic, polymeric and plastic are too restrictive; (ii) geomembranes are not always used as liners; (iii) flexible membrane is redundant; and (iv) no material is absolutely impermeable or impervious. In addition, many users for these materials habitually designate them with trade names, which adds to the terminology confusion. Geomembranes should not be confused with other similar membranes used for such applications as single-ply roofing, floating covers and air supported roof. Also, geomembranes should not be confused with geotextiles [which are permeable by construction].  2, record 1, English, - geomembrane

Record number: 1, Textual support number: 2 OBS

Liquid containment(pond) liners. Undoubtedly the largest single use of geomembranes is in the area of liquid containment. In fact, the name "geomembranes" is actually one that supersedes the name "pond liner, "reflecting the original use of the plastic and rubber materials...  3, record 1, English, - geomembrane

Record number: 1, Textual support number: 3 OBS

Geotextiles are defined as permeable textiles used in conjunction with soils or rocks ... In contrast, geomembranes are defined as impermeable membranes which can also be used in conjunction with soils or rocks.  4, record 1, English, - geomembrane

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 DEF

Feuille synthétique introduite dans le sol et servant d'écran séparateur.  4, record 1, French, - g%C3%A9omembrane

Record number: 1, Textual support number: 1 OBS

Il existe deux types principaux de géotextiles, perméables et imperméables. Ces derniers [...] sont souvent appelés géomembranes, et le terme géotextile est réservé aux textiles perméables apparus après 1960.  3, record 1, French, - g%C3%A9omembrane

Record number: 1, Textual support number: 2 OBS

[Les géomembranes sont] utilisées dans le génie civil pour sa fonction d'étanchéité ou d'imperméabilisation.  5, record 1, French, - g%C3%A9omembrane

Record 1,  Textual support,  Spanish

Record number: 1, Textual support number: 1 DEF

Lámina impermeable y flexible que se utiliza mayoritariamente en lagunas, plantas de tratamiento, rellenos sanitarios, etc. [para] impermeabilizar.  2, record 1, Spanish, - geomembrana

Record number: 1, Textual support number: 1 CONT

Existen diferentes tipos de geosintéticos: los geotextiles, las geomembranas, geomallas, georedes, geoceldas, geomantas, biomantas y la combinación de ellos: los geocompuestos.  2, record 1, Spanish, - geomembrana

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 DEF

A telescope which uses liquid as a reflecting surface. The liquid is spun at a rate which causes it to become a perfect parabolic surface.  2, record 2, English, - liquid%20mirror%20telescope

Record number: 2, Textual support number: 1 CONT

Liquid mirror telescopes cannot be tilted and hence cannot track like conventional telescopes do. To track with imagery, narrow-band filter spectrophotometry or slitless spectroscopy, one can use a technique, called time delayed integration (TDI) also known as drift scan, that uses a CCD detector that tracks by electronically stepping its pixels.  3, record 2, English, - liquid%20mirror%20telescope

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 CONT

Les télescopes à miroir liquide : Le procédé repose sur un principe simple. Pour réfléchir et concentrer les rayons lumineux en un point, le miroir d'un télescope traditionnel doit être parfaitement parabolique. Or, la surface d'un liquide prend naturellement la forme d'une parabole lorsqu'on le fait tourner sur lui-même [...] le mercure, liquide à température ambiante, réfléchit très bien la lumière.  3, record 2, French, - t%C3%A9lescope%20%C3%A0%20miroir%20liquide

Record number: 2, Textual support number: 2 CONT

Les avantages des télescopes à miroir liquide (TML) sont bien connus : facilité de réalisation, très faible coût, même pour un diamètre considérable, et excellentes qualités optiques. Leur inconvénient majeur est, bien sûr, qu'ils ne peuvent «pointer» que la verticale où ils sont installés. [...] Les détecteurs CCD en mode «drift-scan» permettent de «suivre» le déplacement apparent des sources et d'intégrer leur lumière pendant un temps de pose significatif. Ces poses, cumulées sur un certain nombre de nuits, permettent l'observation de «bandes» de ciel avec une profondeur en magnitude apparente tout à fait comparable à celle des observations pointées en imagerie sur un télescope moderne.  4, record 2, French, - t%C3%A9lescope%20%C3%A0%20miroir%20liquide

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 CONT

The reflectivity of mercury does not vary over several weeks within the accuracy of our measurements(±3%). Although throughout this paper I assume that the reflecting liquid is mercury, it should be possible to make liquid mirrors with other reflecting liquids. I [Ermanno Borra] have also considered alloys of the alkali metals that could be used in a lunar or space telescope.  1, record 3, English, - reflecting%20liquid

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 CONT

Le volume normal de mercure nécessaire à la réalisation d'un miroir de 1,6 mètre est d'environ dix litres, ce qui veut dire, à 30 dollars le kilogramme de mercure purifié, une somme de 4000 dollars, soit près de 30 pour cent du coût de l'ensemble de l'instrument, seulement pour le liquide réflecteur.  1, record 3, French, - liquide%20r%C3%A9flecteur

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 DEF

A liquid crystal display that is not equipped with edge or back lighting to enhance readability but rather depends on reflecting ambient light, making it difficult to read in brightly lit environments such as the outdoors.  2, record 4, English, - reflective%20LCD

Record 4,  Textual support,  French

Record 4,  Textual support,  Spanish