TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 DEF

A test or series of tests performed with an assembly of reactor materials which can be gradually brought to the critical state for the purpose of determining the nuclear characteristics of a reactor.  1, record 1, English, - critical%20experiment

Record number: 1, Textual support number: 1 OBS

The experiment is usually performed at very low power.  1, record 1, English, - critical%20experiment

Record number: 1, Textual support number: 2 OBS

critical experiment : term and definition standardized by ISO.  2, record 1, English, - critical%20experiment

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 DEF

Essai ou série d'essais réalisés avec un assemblage de matériaux de réacteur qui peut graduellement être amené à l'état critique dans le but de déterminer les caractéristiques nucléaires d'un réacteur.  1, record 1, French, - exp%C3%A9rience%20critique

Record number: 1, Textual support number: 1 OBS

L'expérience est habituellement réalisée à une puissance très faible.  1, record 1, French, - exp%C3%A9rience%20critique

Record number: 1, Textual support number: 2 OBS

expérience critique : terme et définition normalisés par l'ISO.  2, record 1, French, - exp%C3%A9rience%20critique

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 CONT

The Binary Colloidal Alloy Test-3 is an Exploration Systems’ transition flight experiment in the Human System Research and Technology area. BCAT-3 provides a unique opportunity to explore fundamental physics and simultaneously develop important future technology, including computers operating on light, complex biomolecular pharmaceuticals, clean sources of geothermal power, and novel rocket engines for interplanetary travel. These studies depend entirely on the microgravity environment provided by the International Space Station(ISS) ;in all other locations accessible to science, gravity dominates and precludes investigation of any other effects of interest. The experiment itself [consists of] photographing samples of colloidal particles with a digital camera onboard the ISS. Colloids are tiny nanoscale spheres of plexiglass a thousand times smaller than the width of a human hair(submicron radius) that are suspended in a fluid. They are ubiquitous(e. g., milk, smoke, and paint) and therefore interesting to study directly. Colloids are also small enough that they behave much like atoms and so can be used to model all sorts of phenomena because their size, shape, and interactions can be controlled. The 10 samples in BCAT-3 are made from the same ingredients, each a recipe with different proportions, and are grouped into three experiments :critical point, binary alloy, and surface crystallization. [Text followed by an illustration of a BCAT-3 sample holder. ]  4, record 2, English, - binary%20alloy%20colloidal%20test

Record number: 2, Textual support number: 2 CONT

BCAT-3 is comprised of three separate experiments, which are individually referred to as a binary alloy(BCAT-3-BA), surface crystallization(BCAT-3-SC) and critical point(BCAT-3-CP). The critical point investigation is continuing with additional samples on future ISS [International Space Station] expeditions and will be referred to as Binary Colloidal Alloy Test-4. BCAT-4 will consist of two sets of samples referred to as BCAT-3 and 4 :Critical Point(BCAT-3-4-CP) and BCAT-4 : Polydisperse(BCAT-4-Poly).... The Binary Colloidal Alloy Test-3(BCAT-3) hardware supported three investigations in which ISS crews photographed samples of colloidal particles(tiny nanoscale spheres suspended in liquid) to document liquid/gas phase changes, growth of binary crystals, and the formation of colloidal crystals confined to a surface. Colloids are small enough that in a microgravity environment without sedimentation and convection, they behave much as atoms and so can be used to model all sorts of phenomena because their size, shape, and interactions can be controlled. The BCAT-3 payload consists of ten small samples of colloid alloys in which the microscopic colloid particles are mixed together into a liquid. These ten samples are contained within a small case that is the size of a school textbook. At the start of an experiment run, all ten samples are shaken to completely remix the colloid samples, much in the same way that salad dressing must be shaken to remix oil and vinegar. After the samples are mixed, what remains is periodically photographed using a digital camera until the colloid and liquid components of those samples have separated or the polymers have formed crystals. The samples can be remixed to repeat the experiment. The ten samples in BCAT-3 were selected as part of three separate experiments examining different physical processes :critical point, binary alloys, and surface crystallization.  5, record 2, English, - binary%20alloy%20colloidal%20test

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 OBS

Contexte: recherches en microgravité sur les structures colloïdales; test avec alliages binaires (c'est-à-dire composés de deux éléments) mis à l'état colloïdal.  2, record 2, French, - test%20BACT

Record number: 2, Textual support number: 2 OBS

test BACT (croissance d'alliages binaires à partir de particules colloïdales en suspension) : il faut articuler le syntagme pour rendre compte de la réalité du texte où il est question de la croissance de cristaux binaires qui se développent à partir de particules colloïdales en suspension dans un liquide.  1, record 2, French, - test%20BACT

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 CONT

The Atmospheric Trace Molecule Spectroscopy(ATMOS) Experiment is designed to make global measurements of the composition of the troposphere, stratosphere, and mesosphere. The spectrometer simultaneously measures the concentrations of gases that are involved in the complex chemical and radiative interactions occurring at altitudes between 10 and 150 km(6 to 93 mi). With the instrument's ability to detect these trace gases in concentrations of lower than 1 part per billion, its data are used to make critical tests of theroretical models that describe the physics and chemistry of the stratosphere.  2, record 3, English, - atmospheric%20trace%20molecule%20spectroscopy

Record 3,  Textual support,  French

Record 3,  Textual support,  Spanish

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 CONT

The MEDEA [Materials Sciences Double Rack for Experiment Modules and Apparatus] was another facility containing two furnaces and one high precision thermostat for the investigation into critical point phenomena, directional solidification of metallic crystals, and various long-term crystallization experiments.  3, record 5, English, - high%20precision%20thermostat

Record 5,  Textual support,  French

Record 5,  Textual support,  Spanish