(n.) A kind of curve; one of the conic sections formed by the intersection of the surface of a cone with a plane parallel to one of its sides. It is a curve, any point of which is equally distant from a fixed point, called the focus, and a fixed straight line, called the directrix. See Focus.
(n.) One of a group of curves defined by the equation y = axn where n is a positive whole number or a positive fraction. For the cubical parabola n = 3; for the semicubical parabola n = /. See under Cubical, and Semicubical. The parabolas have infinite branches, but no rectilineal asymptotes.
Example Sentences:
(1) The major variation in these patterns can be modeled by families of parabolas with a single degree of freedom.
(2) The relation between concentration and absorption in an eight step calibration series is well described by a parabola of the 2nd degree.
(3) It was shown that the women used a parabola with a larger margin over the top of the hurdle than the men: A lower parabola would shorten the hurdle step, and would require the lengthening of the three interhurdle steps.
(4) Three to eight parabolas were averaged for subjects in each posture; the mean for each posture was calculated.
(5) It was found that the velocity profile of the FITC labelled RBC in straight microvessels was blunt as compared to a parabola.
(6) The "excitability ratio" is the first derivative of the response parabola and as such becomes a linear function of the actual arterial CO2 partial pressure.
(7) The equation of the resulting parabola, corresponding to the upper frontal arch, can be applied to every maxillary dimension.
(8) This increase is satisfactorily expressed by a cubic parabola.
(9) A not previously described relationship between HbA2 and total Hb was demonstrated and probably conformed to a second degree parabola.
(10) The shape of protrusive condyle path was like a section of parabola curved forward and downward.
(11) Evaluations of the arterial and venous bleeding were conducted at 3 rates x 3 parabolas, and capillary bleeding was evaluated with 5 parabolas x 2 methods (pig's foot and sponge).
(12) The flow velocity profile in the venule seems to deviate slightly from the Newtonian parabola.
(13) The concentration of factor VIIIa can be obtained from the quadratic coefficient of the equation describing the parabola.
(14) Pointing accuracy improved movement-to-movement but not parabola-to-parabola, indicating that prolonged exposure is needed for sustained adaptation.
(15) A "reference parabola" is introduced making the fluid pressure concept more understandable.
(16) Transcranial Doppler data with accompanying acceleration information were analyzed in three segments in each parabola.
(17) The following objectives are addressed in this study: 1) to discuss present techniques and two new radiographic measurement systems; 2) to establish mean, standard deviation, and normal range values for these measurement systems; 3) to determine if these measurements vary with foot size; and 4) to use the results to establish general guidelines for metatarsal parabola reconstruction.
(18) Reaction patterns of 90 cortical neurons to acetylcholine approximated by two parabolas have been divided on simple and complex.
(19) Each parabola included a period of 1.8 Gz, then approximately 20 seconds of weightlessness, and finally a period of 1.6 Gz; the cycle repeated almost immediately for the remainder of the set.
(20) The constant delta C model is explored and a physically more realistic model is advanced which allows for a temperature-dependent delta C which changes sign at some temperature within the range of stability of the native protein; delta G(T) then has the form of a skewed parabola.
Parallel
Definition:
(a.) Extended in the same direction, and in all parts equally distant; as, parallel lines; parallel planes.
(a.) Having the same direction or tendency; running side by side; being in accordance (with); tending to the same result; -- used with to and with.
(a.) Continuing a resemblance through many particulars; applicable in all essential parts; like; similar; as, a parallel case; a parallel passage.
(n.) A line which, throughout its whole extent, is equidistant from another line; a parallel line, a parallel plane, etc.
(n.) Direction conformable to that of another line,
(n.) Conformity continued through many particulars or in all essential points; resemblance; similarity.
(n.) A comparison made; elaborate tracing of similarity; as, Johnson's parallel between Dryden and Pope.
(n.) Anything equal to, or resembling, another in all essential particulars; a counterpart.
(n.) One of the imaginary circles on the surface of the earth, parallel to the equator, marking the latitude; also, the corresponding line on a globe or map.
(n.) One of a series of long trenches constructed before a besieged fortress, by the besieging force, as a cover for troops supporting the attacking batteries. They are roughly parallel to the line of outer defenses of the fortress.
(n.) A character consisting of two parallel vertical lines (thus, ) used in the text to direct attention to a similarly marked note in the margin or at the foot of a page.
(v. t.) To place or set so as to be parallel; to place so as to be parallel to, or to conform in direction with, something else.
(v. t.) Fig.: To make to conform to something else in character, motive, aim, or the like.
(v. t.) To equal; to match; to correspond to.
(v. t.) To produce or adduce as a parallel.
(v. i.) To be parallel; to correspond; to be like.
Example Sentences:
(1) When the data correlating DHT with protein synthesis using both labelling techniques were combined, the curves were parallel and a strong correlation was noted between DHT and protein synthesis over a wide range of values (P less than 0.001).
(2) The time-course and dose-response for this modification of pp60c-src paralleled PDGF-induced increases in phosphorylation of pp36, a major cellular substrate for several tyrosine-specific protein kinases.
(3) We present a mathematical model that is suitable to reconcile this apparent contradiction in the interpretation of the epidemiological data: the observed parallel time series for the spread of AIDS in groups with different risk of infection can be realized by computer simulation, if one assumes that the outbreak of full-blown AIDS only occurs if HIV and a certain infectious coagent (cofactor) CO are present.
(4) There was no correlation between serum LH and chronological or bone age in this age group, which suggests that the correlation found is not due to age-related parallel phenomena.
(5) The cyclical nature of pyromania has parallels in cycles of reform in standards of civil commitment (Livermore, Malmquist & Meehl, 1958; Dershowitz, 1974), in the use of physical therapies and medications (Tourney, 1967; Mora, 1974), in treatment of the chronically mentally ill (Deutsch, 1949; Morrissey & Goldman, 1984), and in institutional practices (Treffert, 1967; Morrissey, Goldman & Klerman (1980).
(6) Stimulation of parallel fibers or iontophoresis of acetylcholine excited P cells.
(7) Label was found widely distributed among all the organs except the nervous system and its rate of disappearance from the tissues paralleled its disappearance from the circulation.
(8) The bundles may lie parallel to the plasma membrane and to the long axis of the cell.
(9) Alterations in DNA synthesis induced by a single dose of cyclophosphamide in normal and tumorous tissues in vivo paralleled in many respects the changes seen when the more time-consuming techniques of the LI or granulocyte colony formation were employed.
(10) Dose distributions were evaluated under thin sheet lead used as surface bolus for 4- and 10-MV photons and 6- and 9-MeV electrons using a parallel-plate ion chamber and film.
(11) The influences of the inhibitor(s) for both tumours and in both culture systems were parallel.
(12) Parallel studies in vivo were carried out to determine the contribution of the phosphatidylserine decarboxylase pathway, relative to pathways utilizing ethanolamine directly, to the synthesis of brain ethanolamine glycerophospholipids.
(13) Plasma renin activities (PRA) and aldosterone concentrations increased in parallel over a wide range of plasma volume deficits produced in unanesthetized rats by extravascular administration of polyethylene glycol (PEG) solution.
(14) Combined study of lungs of 85 foetuses and newborns of various gestational age and 8 newborns dying during the first month of life showed the lung surfactant (LS) system to develop in parallel with formation of respiratory parts and lung capillary network.
(15) Ordering of these filaments into a parallel array is the basis of birefringence in the A region, and loss of birefringence is therefore a measure of decreased order.
(16) Comparing the regression lines of HR-QT and HR-QS2 separately for both groups, we found that both intervals decreased in parallel and the mean QT remained shorter than QS2 in both groups during exercise.
(17) Parallel changes in free T4 and the free T4 index indicate adequacy of the index in representing pineal-induced changes in free T4.
(18) In the course of its history, psychiatry has grown richer parallel to the development of its spatiotemporal system of the reference.
(19) Furthermore, the changes in both interstitial fluid and testicular venous blood levels of testosterone do not always parallel those in peripheral venous blood, suggesting that changes in testicular blood flow and peripheral clearance rates of testosterone may also be important in the control of circulating testosterone concentrations.
(20) On the basis of these data, the computer, upon the basis of a program specially developed for this purpose, automatically calculates the corresponding amount of negative-points, which parallels the severity of the joint changes, i.e.