Word Finder - periodic

definition

Relative to a period or periods.

definition

Having repeated cycles.

synonyms

• cyclic

definition

Occurring at regular intervals.

synonyms

• cyclic

definition

Periodical.

definition

Pertaining to the revolution of a celestial object in its orbit.

definition

(stochastic processes, of a state) For which any return to it must occur in multiples of k time steps, for some k>1.

definition

Having a structure characterized by periodic sentences.

Numerous attempts have been made to find periodic variations in thunderstorm frequency.

His name is best known for the share he had in the periodic classification of the elements.

His name is best known for his work on the Periodic Law.

Although the periodic outbursts of light have taken place without intermission during the two and a half centuries that the star has been under observation, they are somewhat irregular.

Antiperiodics inhibit a disease having periodic recurrences; e.g.

It is natural to compare the periodic outbursts occurring in these stars with the outbursts of activity on the sun, which have a period of about eleven years.

We learn that if the orbital motion of a planet, or a satellite, were arrested, the body would fall into the sun, or into its primary, in the fraction 0.1768 of its actual periodic time.

It is therefore perhaps misleading actually to class the sun with them; but it seems highly probable that whatever cause produces the periodic outbursts of spots and faculae on our sun differs only in degree from that which, in stars under a different physical condition of pressure and temperature, results in the gigantic conflagrations which we have been considering.

Except when the line of sight is perpendicular to the plane of the orbit, the revolution of the two bodies will result in a periodic variation of the motion in the line of sight.

If both the bodies are luminous, especially if they do not differ much in brilliancy, the motion of revolution is shown by a periodic doubling of the lines of the spectrum; when one body is moving towards us and the other away their spectral lines are displaced (according to Doppler's principle) in opposite directions, so that all the lines strong enough to appear in both spectra appear double; when the two bodies are in conjunction, and therefore moving transversely, their spectra are merged into one and show nothing unusual.

More usually, however, only one component is sufficiently luminous for its spectrum to appear; its orbital motion is then detected by a periodic change in the absolute displacement of its spectral lines.

The occurrence of change, either periodic or irregular, in the colour of individual stars, has been suspected by many observers; but such a colour-variability is necessarily very difficult to establish.

It is, the orbit and periodic time is known, and also the parallax, the masses of the stars can be found.

In its salts, thorium is tetravalent, and in the periodic classification it occurs in the same sub-group as titanium, cerium and zirconium.

Mendeleeff and other workers into the Periodic Law, has taken its place as one of the most important generalizations in modern chemical theory.

He collected his various papers on the atomicity of the elements in a little volume on the Discovery of the Periodic Law published in London in 1884.

To find the forced oscillation due to a periodic force we have tl+k+ux-f cos(rjt+e).

This would cause a periodic variation in the latitude of any place on the earths surface, as determined by astronomical methods.

There appears to be evidence of a slight periodic variation of latitude, but the period would seem to be about fourteen months.

Suppose we have an inductive and a non-inductive circuit in series, which is traversed by a periodic current, and that we desire to know the power being absorbed to the inductive circuit.

If b 2 /a 2, 3 /a 3 ..., the component fractions, as they are called, recur, either from the commencement or from some fixed term, the continued fraction is said to be recurring or periodic. It is obvious that every terminating continued fraction reduces to a commensurable number.

The most interesting kind of periodic inequalities are those known as " terms of long period."

The longitudes, latitudes and radii vectores of a planet, being algebraically expressed as the sum of an infinite periodic series of the kind we have been describing, it follows that the problem of finding their co-ordinates at any moment is solved by computing these expressions.

The Babylonian computers were not only aware that Venus returns in almost exactly eight years to a given starting-point in the sky, but they had established similar periodic relations in 4 6, 59, 79 and 83 years severally for Mercury, Saturn, Mars and Jupiter.

A periodic character was thus indicated for the disturbance; and Laplace assigned its true cause in the near approach to commensurability in the periods of the two planets, the cycle of disturbance completing itself in about goo (more accurately 929) years.

Sir George Airy detected in 1831 an inequality, periodic in 240 years, between Venus and the earth.

Lakes of the broad type are of moderate depth, the deepest sounding in [[Victoria (disambiguation)|Victoria ]] being under 50 fathoms. Apart from the seasonal variations of level, most of the lakes show periodic fluctuations, while a progressive desiccation of the whole region is said to be traceable, tending to the ultimate disappearance of the lakes.

The periodic fluctuations in the level of Lake Tanganyika are such that its outflow is intermittent.

Not the equal of Caesar or Augustus in genius or in the lastingness of his work, he yet recalls them in his capitularies, his periodic courts, his official hierarchy, his royal emissaries, his ministers, his sole right of coinage, his great public works, his campaigns against barbarism and heathenry, his zeal for learning and literature, and his divinity as emperor.

Astronomers were only then beginning to study variable and periodic stars, and disturbances in that part of the heavens, which had till then, on the authority of Aristotle, been regarded as incorruptible, combined with the troubles of the times, must have given a new stimulus to belief in the signs in heaven.

A second error can arise through the inaccuracy of the eyepiece micrometer, and also in the case of a screw micrometer through periodic faults of the screw, and through dead motion.

About the end of the 19th century research showed that there actually was a very minute but measurable periodic change of this kind.

The concentric rings of growth, which form a characteristic feature, are due to periodic variations in the size of the larger tubes.

In this brief tract, Kant, apparently in entire ignorance of the explanation given in 1735 by Hadley, points out how the varying velocity of rotation of the successive zones of the earth's surface furnishes a key to the phenomena of periodic winds.

In the Hospitalier ondograph, 1 a synchronous electric motor driven in step with the periodic current in the circuit being tested drives a cylinder of insulating material having a metallic slip let into its edge.

They consist essentially of a galvanometer of which the needle or coil has such a short natural periodic time that it can follow all the variations of a current which runs through its cycle in say i;nth second.

This ray is also given a periodic motion of the same frequency by reflection from a separate oscillating mirror so as to make the two motions at right angles to one another, and thus we have depicted on the screen a bright line having the same form as the periodic current being tested.

In this instrument the periodic current, the time variation of which is being studied, passes through a pair of fine wires or strips, going up one wire and down the other.

The customer has the right to carry out periodic audits at times mutually agreeable to both parties.

The post will require periodic attendance outside normal working hours.

The PEIT sector has experienced periodic bouts of heightened share price volatility.

Set a periodic checkpoint effective for restarting the parent request automatically.

Following a section on normed linear spaces, we will consider periodic approximation using classical Fourier series.

The transition matrices of periodic Markov chains have eigenvalues on the unit circle.

Where glider means a periodic structure moving through time on a periodic background called ether by Cook.

On the other hand, control of these chaotic motions is also studied by applying a parametric periodic excitation.

The next week we had three of our planes in our main hanger for periodic inspection.

During a polymer injection molding process, an unexpected periodic pattern is often observed on a molded product surface.

A never-ending task is ensuring our Class VI fleet is up to standard with annual tests and periodic inspections.

It brings spiritual poverty, obesity, social isolation, covert competition, satiation, heartlessness and periodic nervous breakdown.