What's the difference between convex and parallelogram?

Convex


Definition:

  • (a.) Rising or swelling into a spherical or rounded form; regularly protuberant or bulging; -- said of a spherical surface or curved line when viewed from without, in opposition to concave.
  • (n.) A convex body or surface.

Example Sentences:

  • (1) Seventy-eight patients presented optochiasmal arachnoiditis: 12 had trigeminal neuralgia; 1, arachnoiditis of the cerebellopontile angle; 6, arachnoiditis of the convex surface of the brain; and 3, the hypertensive hydrocephalic syndrome due to occlusion of the CSF routes.
  • (2) The intervertebral discs expand centrally and become increasingly convex.
  • (3) Rocking the hepatocyte-splenocyte cultures changed the elution profile from linear to convex.
  • (4) Lower density foams can be used only if the impact test standards are rewritten with less emphasis on impacts with convex and pointed objects.
  • (5) A solution of a specific ligand molecule of constant concentration is introduced into the cell so that its concentration in the cell increases continuously (as in a mixing chamber for forming a convex gradient).
  • (6) Rotations toward the convexity occur in rotational kyphosis.
  • (7) The patient's soft-tissue profile was normally convex.
  • (8) The case of a 49-year-old female with a left parietal convexity meningioma associated with an acute subdural hematoma is described.
  • (9) This change in shape varied from a slight flattening of the LV and IVS during diastole to total reversal of the normal direction of septal curvature such that the IVS became concave toward the RV and convex toward the LV.
  • (10) The technique combines the conventional plotting the contour lines and the highlighting, by means of hatching, of the concavities (or convexities) of the 'surface' representative of radioactive distribution.
  • (11) Ablations of the entire dorsal convexity, and of the mesial and cingulate regions of the cortex, failed to interfere with the spindle bursts and recruiting responses, whereas ablations confined to the orbital cortex alone abolished completely these potentials in the cortex and thalamus.
  • (12) The method uses overlapping of Pi1, 3 and 4 in perfect centering of the lens in the axis of the eye (it is assessed by drawing a perpendicular line on the centre of the cornea) and marked dislocation of Pi3 in the direction of decentration of the planoconvex lens with the convexity facing the cornea.
  • (13) In the trunk, e.g., in the buttock and the breast, it is useful to reconstruct the natural convexity.
  • (14) Rats with spinal deformity showed an imbalance of the paraspinal muscles when assessed by EMG; this was expressed by an increase of muscular activity on the convex side.
  • (15) The diagnostic criteria of median nerve compression (carpal tunnel syndrome) include morphological and signal changes in the nerve, abnormal palmar convexity of the flexor retinaculum and signs of tenosynovitis of the intracarpal flexor tendons.
  • (16) Microvillus formation was not observed when cell volume was increased by incubation of tissue in half-normal amphibian Ringer's solution for 30 min, or with exposure to acetylcholine, which caused accentuation of the convexity of the apical surface of the granular cell similar to that observed with VP-induced osmotic water flow.
  • (17) Meningiomas of the convexities (six patients) turned out to be particularly susceptible to complete embolizations.
  • (18) The granulomatous lesions were classified by location into basilar, convexity, intrahemispheric, and periventricular white-matter involvement.
  • (19) One exception to this is observed in the brain, where arteries come in from the base and veins collect over the convexity.
  • (20) The shapes of false lumina assessed by enhanced CT scans at the time of discharge were categorized in three types; 21 patients (group A) without false lumina of the aorta, or with a small crescentic false lumen in the thoracic aorta (type a), six patients (group B) with intimal flaps and two contrast-material-filled lumina in the thoracic aorta (type b), and nine patients (group C) with expanded false lumina or a false lumen whose margin was convex towards a true lumen in the thoracic aorta (type c).

Parallelogram


Definition:

  • (n.) A right-lined quadrilateral figure, whose opposite sides are parallel, and consequently equal; -- sometimes restricted in popular usage to a rectangle, or quadrilateral figure which is longer than it is broad, and with right angles.

Example Sentences:

  • (1) Second, although the parallelogram model provides a slightly better fit of our data than the other two shapes, it does not serve as a better guide than the ellipsoidal model for interpolating from the measurements to thresholds in novel color directions.
  • (2) A new calcium quantification technique that uses a parallelogram was developed to eliminate the problem of nodule superimposition over ribs.
  • (3) The parallelogram approach is based on the principle that estimates can be obtained on the amount of genetic damage that cannot always be assessed directly.
  • (4) Analysis of these responses provides weak but consistent evidence for the elicitation of depth in the Sander parallelogram, Mueller-Lyer, Zoellner, and Ehrenfels variant of the Ponzo illusion.
  • (5) When added to suspensions of membrane crystals of the channel, the polyanion caused disordering of the usual parallelogram array and increased occurrence of a contracted form of the array.
  • (6) Inspired by the parallelogram suspension utilized in the larger Huxley-style micromanipulator (A. F. Huxley.
  • (7) This can be illustrated by parallelograms of forces.
  • (8) Partially reassociated mixtures show dimers of the subunit that have a characteristic parallelogram shape when lying flat on the electron microscope grid, and a "boat" form in side view.
  • (9) Each group was classified in a parallelogram without overlapping, except for a part of the imidazole and thiol groups.
  • (10) Pigeons learned to peck a green key on which parallelogram-shapes were projected; they then received generalization tests in which the orientation of the parallelogram was varied.
  • (11) We evaluate how well three different parametric shapes, ellipsoids, rectangles, and parallelograms, serve as models of three-dimensional detection contours.
  • (12) Nondifferential training produced very little eventual stimulus control along the orientation dimension, but when training included S- trials (absence of the parallelogram) subjects responded consistently more to certain orientations than to others.
  • (13) Approximately, the dimer belongs to point group Ci with the centre of inversion at the centre of La2O2 parallelogram.
  • (14) This result was confirmed by varying element size and spacing, and by using oblique crosses rather than parallelograms as stimuli.
  • (15) The monomeric unit can be divided into a glycan chain piece, a connecting peptide, and a peptide chain piece, which define a solid parallelogram.
  • (16) A parallelogram approach can be used to estimate effects in non-accessible human tissues by using data from accessible human tissues and analogous tissues in animals.
  • (17) The zebrafish sperm plasma membrane, treated with freeze-fracture techniques, is seen to contain a multitude of intramembranous particles that, in a specific region of the posterior part of the sperm head, are organized into unusual particle arrays that appear as simple hexagons or parallelograms.
  • (18) Joystick-controlled rho-pixel arrays have been implemented with parallelogram-shaped rho-pixels incorporated as a simplified case of quadrilateral projection.
  • (19) Aside from conceptual difficulties with the task for both non-musicians and composers, choices for both groups provide support for the parallelogram model indicating a capacity in listeners to perceive abstract relations among the timbres of complex sounds without specific training in such a task.
  • (20) Such reports were made in the presence or absence of various types of visual, geometric surrounds (squares, triangles, crosses, or parallelograms).