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Z FIELD [8 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2025-05-29

English

Subject field(s)
  • Scientific Research Equipment
  • Physics
  • Analytical Chemistry
CONT

Acceleration of ions to a constant energy for TOFMS [time-of-flight mass spectrometry] is achieved by [the] application of an electrostatic field over a known distance(from an ion's initial position to the exit of the acceleration region). By this method, all ions starting from that point, regardless of m/z [mass-to-charge ratio], are sent into the mass-separation region(the flight tube) with the same nominal boost in energy.

French

Domaine(s)
  • Matériel et équipement (Recherche scientifique)
  • Physique
  • Chimie analytique
CONT

[Dans un analyseur à temps de vol, la] charge de l'ion et la tension d'accélération étant constantes, la vitesse d'un ion est d'autant plus grande que sa masse est faible; les ions les moins lourds arrivent les premiers au détecteur situé à l'extrémité du tube de vol.

Spanish

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Record 2 2020-09-10

English

Subject field(s)
  • Scientific Instruments
  • Physics
  • Analytical Chemistry
CONT

To study systems with large mass-to-charge ratios or systems that have very complicated isotope patterns, we need a spectrometer with the ability to accurately determine masses so we can be sure we are studying the right ion. For this we use a Fourier transform ion cyclotron resonance mass spectrometer(FT-ICR MS). In this technique, the mass-to-charge ratio(m/z) of an ion can be experimentally determined by measuring the frequency at which the ion processes in a magnetic field.

French

Domaine(s)
  • Instruments scientifiques
  • Physique
  • Chimie analytique

Spanish

Save record 2

Record 3 2013-04-03

English

Subject field(s)
  • Telecommunications
CONT

Quite often you will be required to enter information into a PNR just for the benefit of other agents reading the PNR. In such instances, no messages are sent, and the field is completely free flow. This field is known as the "remarks" or Z field.

French

Domaine(s)
  • Télécommunications
CONT

Vous devrez souvent introduire dans le PNR des renseignements destinés uniquement aux autres agents qui consulteront le dossier. Vous n'envoyez pas alors un message et toute la zone est en rédaction libre. Celle-ci est la zone remarques ou zone Z.

Spanish

Save record 3

Record 4 2013-03-20

English

Subject field(s)
  • Air Transport
CONT

Quite often you will be required to enter information into a PNR just for the benefit of other agents reading the PNR. In such instances, no messages are sent, and the field is completely free flow. This field is known as the "remarks" or Z field.

French

Domaine(s)
  • Transport aérien
CONT

Vous devrez souvent introduire dans le PNR des renseignements destinés uniquement aux autres agents qui consulteront le dossier. Vous n'envoyez pas alors un message et toute la zone est en rédaction libre. Celle-ci est la zone remarques ou zone Z.

Spanish

Save record 4

Record 5 2012-01-09

English

Subject field(s)
  • Analytical Chemistry
  • Electromagnetic Radiation
CONT

[In] the TOE(truncated Overhauser effect) … a saturating field is applied to set A for a variable time, and the z magnetization of the remaining sets are then sampled by application of a 90° pulse, recording the PID and Fourier transformation.

French

Domaine(s)
  • Chimie analytique
  • Rayonnements électromagnétiques
CONT

NOE tronqué ou TOE. Le mode de perturbation est le même que pour le NOE stationnaire (Sz = 0) mais le temps t est insuffisant pour que l’équilibre soit atteint. On étudie la cinétique de croissance de l’aimantation du noyau A. On obtient le NOE tronqué (TOE) par intégration de l’équation de Solomon […]

OBS

NOE : sigle adopté en français et venant de l’anglais «Nuclear Overhauser Effect» (effet Overhauser nucléaire). NOE constitue une source majeure d’information en résonance magnétique nucléaire (RMN).

OBS

TOE : truncated Overhauser effect.

Spanish

Save record 5

Record 6 - external organization data 2009-07-30

English

Subject field(s)
  • Compartment - ISO/IEC JTC 1 Information Technology Vocabulary
Universal entry(ies)
06.01.92 (19762)
ISO/IEC standard entry number
DEF

polarization of a propagating wave is determined by the locus or path described by the electric field vector with respect to time

OBS

Polarization is a term that often arises in the literature and when considering radio frequency communication and RFID. If we ascribe an x, y, z co-ordinate system to a propagating wave as illustrated below, with the direction of propagation being in the z direction, the electric field vector E will be in the x, y plane. If E remains in the same orientation with respect to time, so that its locus describes a straight line, the wave is said to be linearly polarized. However, if the locus describes a circular motion with respect to time the wave is said to be circularly polarized. Where the locus describes an elliptical path, the wave is said to be elliptically polarized.

OBS

Circular polarization is often used in communication systems since the orientation of the transmitting and receiving antenna is less important than it is with linearly polarized waves. The magnetic vector, H, always remains perpendicular to the E vector. Using an IEEE convention, a clockwise circular rotating wavefront approaching a receiver is defined as being left-hand circular (LHC) polarized. The power in the wavefront is expressed in the form of the Poynting vector, P: P = (E x H) = E x H sin ..., where ... is the phase angle between E and H.

OBS

polarization summary: term and definition standardized by ISO/IEC [ISO/IEC 19762-4:2008].

French

Spanish

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Record 7 2001-09-05

English

Subject field(s)
  • Computer Graphics
CONT

Similar Triangles. When viewing objects in the real world, the light rays from the objects within the viewer's field of view enter the eye radially rather than in parallel as in the orthographic projection. The eye is very small compared to the scene it is viewing, and the light rays are projected to the point(the eye) rather than a plane. The equations for the projection are derived using the "similar triangles" method, where the triangle formed by the viewer's eye, space z, and space point is similar to that formed by the eye, the screen distance from the viewer's eye, and the screen point.

French

Domaine(s)
  • Infographie

Spanish

Save record 7

Record 8 2000-08-18

English

Subject field(s)
  • Printed Circuits and Microelectronics
  • Industrial Techniques and Processes
CONT

Wafer steppers(or projection step-and-repeat mask aligners) are one of the three types of mask aligners currently being used for the fabrication of integrated circuits. The other two types are contact/proximity and projection scanners.... Wafer steppers operate in one of two modes. The "first-generation" steppers use fixed steps, with no references to local targets in mid-wafer. Later-design steppers have the capability to re-reference periodically, typically at each field exposure step. The most sophisticated steppers can make adjustments to X, Y, [THETA](rotation), Z(focus), and two-dimensional tilt to attain the ultimate in overlay accuracy and resolution.

French

Domaine(s)
  • Circuits imprimés et micro-électronique
  • Techniques industrielles

Spanish

Save record 8

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