| ultrafiltration (Separation of colloidal or very fine solid materials by filtration through microporous or semipermeable mediums) |
ultrafiltració |
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| ultrasound (Sound waves having a frequency above about 20,000 hertz) |
ultrasò |
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| ultraviolet radiation (The part of the electromagnetic spectrum with wavelengths shorter than light but longer than x-rays; in the range of 4-400 nm) |
radiació ultraviolada |
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| UNCED (United Nations Conference on Environment and Development, Rio de Janeiro, Brazil, 1992) |
CNUMAD "Conferència sobre Medi Ambient i Desenvolupament, Rio de Janeiro, 1992" |
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| uncontrolled dump (Place where waste is left on the ground and not buried in a hole) |
abocador incontrolat |
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| underground disposal (The discharge, dumping or emission of wastes below the surface of the soil) |
abocament subterrani |
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| underground dump (Any subterranean or below-ground site in which solid, or other, waste is deposited without environmental controls) |
dipòsit subterrani |
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| underground quarry (Quarry located below the surface of the earth) |
pedrera subterrània |
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| underground railway |
línia metropolitana |
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| underground storage (Storage located underground designed to hold gasoline or other petroleum products or chemical solutions) |
dipòsit subterrani |
|
| underground train (A train for transportation of people, mostly beneath the surface of the ground, in order to lessen the traffic) |
tren subterrani |
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| underprivileged people (A segment of the population that does not have access to the rights or benefits granted to the rest of society, often because of low economic or social status) |
gent desprotegida |
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| undertaking business (Any commercial activity, position or site associated with the preparation of the dead for burial and the management and arrangement of funerals) |
empresa funerària |
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| underwater outlet (Point of water disposal located below the sea surface) |
emissari submarí |
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| unemployment (The condition of being without remunerative employment) |
desocupació |
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| ungulate (Hoofed mammals, including the Artiodactyla and Perissodactyla) |
ungulat |
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| United Nations (A voluntary association of around 180 state signatory to the UN charter (1945), whose primary aim is to maintain international peace and security, solve economic, social, and political problems through international co-operation, and promote respect for human rights) |
Nacions Unides |
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| unleaded petrol (Petrol with a low octane rating, which has no lead additives in it and therefore creates less lead pollution in the atmosphere) |
gasolina sense plom |
|
| unsupervised image classification (Unsupervised classification is a kind of classification which takes place with minimum input from the operator; no training sample is available and subdivision of the feature space is achieved by identifying natural groupings of the measurement vectors) |
classificació d'imatges no supervisada |
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| upbringing |
educació |
|