What's the difference between convexity and curvature?

Convexity


Definition:

  • (n.) The state of being convex; the exterior surface of a convex body; roundness.

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).

Curvature


Definition:

  • (n.) The act of curving, or the state of being bent or curved; a curving or bending, normal or abnormal, as of a line or surface from a rectilinear direction; a bend; a curve.
  • (n.) The amount of degree of bending of a mathematical curve, or the tendency at any point to depart from a tangent drawn to the curve at that point.

Example Sentences:

  • (1) Thirty-three patients with idiopathic scoliotic curvatures underwent metrizamide myelography before surgery from 1979 through 1985.
  • (2) Experiment 4 measured curvature selectivity as a function of the orientation of a curved adapting grating.
  • (3) Our analysis showed that the interpolation errors are proportional to the curvature of the dose distribution and are relatively high in regions on either side of, but not including, the steepest part of the penumbra.
  • (4) The influence of degree of hydration of the monolayers and their spontaneous curvature on conditions of monolayer fusion have been analysed.
  • (5) The radius of curvature was shorter in the former than in the latter.
  • (6) This suggests that the curvature of the xenon clearance curve is the result of recording the summation of the activities from the alveoli and the pulmonary blood and not, as previously described, due to the existence of two different sub-populations of alveoli.
  • (7) A retrospective study was performed to evaluate the effect of recipient-donor trephine disparity on refractive error and corneal curvature post-suture removal in keratoconus.
  • (8) The top of the fence can also be manipulated in certain ways such as including curvature outward at the top of the fence to make scaling it much more difficult for most.” Some critics, including Washington DC congressional delegate Eleanor Holmes Norton, have warned against excessive fortification, but the report argues: “We recognise all the competing considerations that may go into questions regarding the fence, but believe that protection of the President and the White House must be the higher priority.” “Every additional second of response time provided by a fence that is more difficult to climb makes a material difference in ensuring the President’s safety and protecting the symbol that is the White House.” The panel also urges that a new head of secret service, to replace ousted head Julia Pierson, be brought in from outside the agency, ensuring it is better staffed and trained in future.
  • (9) The EWRGP group showed a mean flattening in corneal curvature of 0.11 and 0.15 mm in the flattest and steepest corneal meridians, respectively.
  • (10) This report presents a patient with a tumor of the splenic flexure invading the diaphragm, greater curvature of the stomach, splenic hilum, and tail of the pancreas.
  • (11) Swimming in the lamprey is accomplished by the generation of a travelling wave of body curvature in which the phase coupling between segments is so controlled as to give approximately one full wavelength on the body at any swimming speed.
  • (12) Three cases are presented in which a focal concave deformity occurred along the greater curvature of the stomach on upper gastrointestinal (GI) series.
  • (13) The posterior stabilized total knee prosthesis was introduced as a modification of the total condylar design, changing the center of curvature of the femoral component to allow greater ROM.
  • (14) 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.
  • (15) This effect occurs independently in both eyes and it is not due to changes in corneal curvature.
  • (16) An iterative method is presented which solves for the radius of curvature despite the variation in magnification.
  • (17) Grating phase had no effect on performance at any curvature or grating frequency, but 16.0-cpd gratings produced a threshold elevation at all curvatures by an average factor of 2.4.
  • (18) Anomalous positive curvatures in dissolution profiles suggested that calcium bilirubinate initially reduced the surface area available for cholesterol dissolution.
  • (19) This study presents in detail the exact geometry of scapula anatomy, giving precise figures for distances, angles, and radii of curvature of the scapula.
  • (20) The normal red cells were biconcave disks in which chlorpromazine induced inward (negative) curvature: deep cupping (stomatocytosis) and multiple invaginations.

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