What's the difference between azimuth and nadir?

Azimuth


Definition:

  • (n.) The quadrant of an azimuth circle.
  • (n.) An arc of the horizon intercepted between the meridian of the place and a vertical circle passing through the center of any object; as, the azimuth of a star; the azimuth or bearing of a line surveying.

Example Sentences:

  • (1) The dependence of fluorescence polarization of stained nerve fibres on the angle between the fibre axis and electrical vector of exciting light (azimuth characteristics) has been considered.
  • (2) Enhanced sensitivity to ITDs should translate to better-defined azimuthal receptive fields, and therefore may be a step toward achieving an optimal representation of azimuth within the auditory pathway.
  • (3) A sound source is commonly spherical, therefore solutions are found for the wave equation in spherical coordinates, giving a precise meaning to the 'azimuthal' and 'magnetic quantum number' analogy.
  • (4) An electron microscopic investigation of the interaction in vitro of two major Z-line proteins, alpha-actinin and F-actin, indicated that the positions of alpha-actinin bridges between actin filaments are defined by relative azimuthal positions of actin subunits.
  • (5) The pattern of QRS loop in the 3 planes, the voltage of right maximum spatial vector (RMSV) and left maximum spatial vector (LMSV), their projection onto the horizontal (azimuth) and frontal plane (elevation) were related to right ventricular systolic pressure.
  • (6) The directional component of the data analysis was important; analysis in the azimuthal direction was more accurate than in the axial direction.
  • (7) Lead and rear bridges are axially at least 13 nm apart on actin; the expected 60 degrees difference in azimuth is expressed by head-neck portions, but the head-actin-head axis rotates by only 30 degrees.
  • (8) Localization was always poorer at 30 degrees azimuth (the smallest used) than at any of the other azimuths (0 degree, 30 degrees, 60 degrees, 90 degrees right and left), regardless of microphone spacing.
  • (9) Furthermore, there is neither an azimuthal nor an elevational axis within the FM-FM area.
  • (10) A method is described whereby three-dimensional co-ordinates of points on a cranium can be recorded in terms of azimuth, elevation and radial distance from a selected point.
  • (11) All three measurements were affected by changes in the loudspeaker azimuth and reference microphone location.
  • (12) The sensitivity to variations in sound-source elevation was studied in 48 units, previously examined as to their azimuthal sensitivity, of the inferior colliculi of cats.
  • (13) Detection of interaural time differences underlies azimuthal sound localization in the barn owl Tyto alba.
  • (14) Six subjects localised a sound source (white noise through a speaker) which varied in position over a range of elevations (-40 degrees to +40 degrees) and azimuths (0 degrees to 180 degrees), at 10 degrees intervals, on the left side of the head.
  • (15) From its representation on the spherical surface it was unfolded into the plane using a polar azimuthal radially equidistant projection.
  • (16) We have previously demonstrated that in animals with both ears intact, there is a topographical representation of the azimuthal dimension of auditory space in the deep layers of this nucleus.
  • (17) The loudspeakers, 15 deg apart, were arranged in a semicircle (0-270-180 deg, azimuth).
  • (18) Response centers of all 223 neurons were located between 0 degrees and 50 degrees in azimuth, 2 degrees up and 25 degrees down in elevation of the contralateral frontal auditory space.
  • (19) The zone represents positions within 4 deg of the midline at the 0-deg horizontal meridian, and positions out to 15-deg azimuths in the upper hemifield and out to positions of 25-deg azimuth in the lower hemifield.
  • (20) In the alternative (ABI-constant) method, intensity at the two ears was varied symmetrically about a constant base intensity, in a manner roughly approximating the pattern of changes that occur when a free-field stimulus is moved in azimuth from the median sagittal plane.

Nadir


Definition:

  • (n.) That point of the heavens, or lower hemisphere, directly opposite the zenith; the inferior pole of the horizon; the point of the celestial sphere directly under the place where we stand.
  • (n.) The lowest point; the time of greatest depression.

Example Sentences:

  • (1) Following parturition, NONLAC cows averaged 4.0 d to negative EB nadir and 14.3 d to first ovulation.
  • (2) Seven days of constant light, however, reverses this diurnal variation such that plasma prolactin levels peak at 11:30 AM and reach a nadir at approximately 11:30 PM.
  • (3) Microsomal protein synthesis as measured by [3H]leucine incorporation was also depressed in a dose-dependent fashion; however, inhibition did not reach the nadir until day 4, 1 day after renal dysfunction was established.
  • (4) A trend to a phase-advance of cortisol nadir and melatonin peak was seen in the acutely ill depressed patients with abnormal DST, possibly indicating an involvement of the suprachiasmatic nuclei in the hypothalamus.
  • (5) The time-related incidence of these cells entities--the appearance of "dusk" and "bright" cells at 5 min, transitory domination of "bright" cells and the nadir of "dusk" cells at 20 min, sporadic recognition of "bright" cells, lack of "dusk" cells at 45 min and the absence of both cell forms at 180 min--displayed that LP-reactive response promptly appeared and rapidly ceased.
  • (6) In women, but not in men, there was a rise in the risk of falling from 45 years, peaking in the 55-59 year age group, and sinking to a nadir at ages 70-74.
  • (7) The binding is highest in the early morning and reaches a nadir in the late afternoon.
  • (8) Strict criteria for dose adjustments according to nadir counts were applied.
  • (9) One became azoospermic at week 16, while the other's total sperm counts continued declining and reached a nadir of 1.4 million by week 20.
  • (10) The WBC nadir occurred at a median of 10 days and the median time required for normalization of the WBC was 18 days.
  • (11) The main toxicity was haematological with delayed leucopenia and thrombopenia (nadir: week 6).
  • (12) Nadir values coincided with maximal toxic granulation of the neutrophils.
  • (13) The circadian rhythm observed in patients with intermittent claudication has early evening peaks and a nocturnal trough with a nadir occurring after midnight and before 0400.
  • (14) Portsmouth , still looking for their first home win under Tony Adams, dominated the first 25 minutes, when Nadir Belhadj was outstanding.
  • (15) Pre-treatment concentrations of P-FN were within the reference range and significantly higher than the nadir value (p less than 0.05).
  • (16) A model was constructed according to these two parameters that significantly describes ln (nadir WBC) (p = 0.001).
  • (17) Following spontaneous horizontal roving eye movement, both eyes deviated downward slowly from midposition, taking 1 to 2 seconds to reach the nadir.
  • (18) Griffiths replaced Nadir Ciftci for the start of the second half after a dismal first 45 minutes from the home side and Ronny Deila’s men continued to struggle, with Bitton sent off in the 67th minute after picking up his second yellow card.
  • (19) The second pulse was of slightly lower amplitude, reaching a maximum of 2.3 to 8.0 fold over the control value and 1.25 to 2.5 fold over the preceding nadir.
  • (20) The period from 2004-5 was the nadir: some American DJs even emigrated to Berlin, where the work prospects were better.

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