If precise dates are required, the beginning may be set in 802 AD, when the founder of the Khmer Empire, Jayavarman II pronounced himself universal monarch ( chakravartin ) and declared independence from Java, and the end may be set in 1431 AD, when Thai invaders from the kingdom of Ayutthaya sacked Angkor and caused the Khmer elite to migrate to Phnom Penh.

Geologists can also give precise absolute dates to geologic events.

A large advance in geology in the advent of the 20th century was the ability to give precise absolute dates to geologic events through radioactive isotopes and other methods.

The precise dates of various periods in history are more or less arbitrary.

It is difficult to assign any precise dates to his writings because he tended to revise them throughout his life.

) do not allow very precise dating, even augmented by the few existing C-14 dates due to the tolerance inherent in these.

The moon, as another extraterrestrial body that has not undergone plate tectonics and that has no atmosphere, provides quite precise age dates from the samples returned from the Apollo missions.

The precise division of Francia into a Neustrian, Austrasian, and Burgundian kingdom dates only from the late sixth century, so earlier kings who ruled from Soissons or Paris are here excluded.

As there are no precise dates for when the Millennial generation starts and ends, commentators have used birth dates ranging somewhere from the mid-1970s to the early 2000s ( decade ).

As with most periodizations of history, however, the precise dates chosen vary.

Regardless of the precise dates used to define its beginning and end points, the early modern period is generally agreed to have comprised the Renaissance, the Reformation, the Scientific Revolution, and the Enlightenment.

There are no precise dates for when Generation Y starts and ends.

The precise dates and means of formation of the lordships varied, as did their size.

The precise date of his birth is uncertain ; birth dates of 1441 – 1445 are proposed.

The mound's passage is shorter than the long entryways of monuments like Newgrange, which makes it less precise in providing alignments with the Sun ; still, Martin Brennan, in The Stones of Time, states that the daily changes in the position of a 13-foot ( 4-m ) long sunbeam are more than adequate to determine specific dates.

Most accounts have this happening between 1973 and 1977 but precise dates are not known.

In the two proceeding centuries there are no precise dates in its history.

The history of such software is usefully summarized in the SCORM 2004 2nd edition Overview ( section 1. 3 ), unfortunately, however, without precise dates.

Although he was born and died in Siena, the dates of his life are not precise.

Based on his examination of the stanza forms, Keats biographer Andrew Motion thinks " Ode on Indolence " was written after " Ode to Psyche " and " Ode to a Nightingale ", although he admits there is no way to be precise about the dates.

The precise dates appears to have varied considerably however, and in some cases, quite significantly, the Ember Weeks lost their connection with the Christian festivals altogether.

Its present name of Sophia dates from the Middle Ages, though the precise date of its first use cannot be assigned ; in the sixteenth century Sredetz and Sophia were used simultaneously.

As the Mossi people's history has been kept by oral tradition, it is impossible to assign precise dates for the period before colonization.

Though the precise date of the Exeter Codex's inscription is still unknown, it may generally be described as one of the great works of the English Benedictine revival of the tenth century, and proposed dates of authorship generally range from 960 to 990.

It also focuses the researcher in formulating hypotheses in a precise and exact manner, whereas theoretical models often stay very vague.

The precise reason for Crosby's refusal to sing the song has never been adequately explained but the ensuing fracas between the guitarist and the band's manager, Jim Dickson, ended with Dickson sitting on Crosby's chest, telling him " The only way you're going to get through that door is over my dead body ... You're going to stay in this room until you do the vocal.

The precise nature of his relationship to the court of Monaco, and the length of his stay, are not known.

Some very precise applications need constant and thorough tweaking to stay up to date and deliver best possible results.

In fact, the modern explanation of the uncertainty principle, extending the Copenhagen interpretation first put forward by Bohr and Heisenberg, depends even more centrally on the wave nature of a particle: Just as it is nonsensical to discuss the precise location of a wave on a string, particles do not have perfectly precise positions ; likewise, just as it is nonsensical to discuss the wavelength of a " pulse " wave traveling down a string, particles do not have perfectly precise momenta ( which corresponds to the inverse of wavelength ).

For example, it is difficult to get a precise definition of the Copenhagen interpretation as it was developed and argued about by many people.

The Copenhagen interpretation holds that it cannot be predicted by any method, not even with theoretically infinitely precise measurements.

Cafferty sparked some national controversy among some liberal watchdog groups, particularly Media Matters for America during the January 12, 2010 broadcast of The Situation Room, in which Cafferty called her a " horrible woman " for refusing to disclose the precise cost of her trip to the Copenhagen Climate Summit, that Cafferty felt was a complete waste of tax payer money.

His movements and speech are precise, clear and quick.

These frequencies are amplified and detected by the FM receiver after each burst of transmitted energy and, after the `` pill '' has been calibrated, precise internal pressure indications can be obtained.

One species is restricted to statements which are neither explicit nor precise regarding a particular person, place, time or thing.

Race-drivers, on the other hand, are quite often killed on the circuit, and since it was obviously Mr. Remarque's intention to establish automobile racing as life in microcosm, one might reasonably have expected him to demonstrate precise knowledge not only of techniques but of mores and attitudes.

For different applications there are different precise definitions.

#" In parallel passages, whether of the New or Old Testament, especially in the Synoptic Gospels, which ancient copyists continually brought into increased accordance, those testimonies are preferable, in which precise accordance of such parallel passages is not found ; unless, indeed, there are important reasons to the contrary.

Plaster molds are easy to make, and can make precise parts with good surface finishes.

In a sense that can be made precise, the probability that two randomly chosen integers are coprime is 6 / π < sup > 2 </ sup > ( see pi ), which is about 61 %.

A context-free grammar provides a simple and mathematically precise mechanism for describing the methods by which phrases in some natural language are built from smaller blocks, capturing the " block structure " of sentences in a natural way.

The precise differences in theology that caused the split with the Coptic Christians are still disputed, highly technical and mainly concerned with the nature of Christ.

Both its thumbs and big toes are opposable, allowing a precise grip.

The most common approach to turn this intuitive idea into a precise definition uses limits, but there are other methods, such as non-standard analysis.

Generally the shotguns are regulated to hit the point of aim at a given distance, usually the maximum expected range since that is the range at which a full choke would be used, and where precise regulation matters most.

These terms by themselves are not very precise, and many subtle intermediate cases exist.

However the assumptions used in the appraisal ( especially the equity discount rate and the projection of the cash flows to be achieved ) are likely to be at least as important as the precise model used.

Here, the focus is not on finding precise solutions to the equations defining the dynamical system ( which is often hopeless ), but rather to answer questions like " Will the system settle down to a steady state in the long term, and if so, what are the possible attractors?

A person who wishes to be vague might conceal words that are too precise in the social context.

Their counterparts are known as trolls who are less " professional " and write obvious and blunt remarks to incite a flame war, as opposed to the more subtle, yet precise flamers.

However, new technologies are making genetic modifications easier and more precise.

The precise conditions under which * is defined are not articulated here and vary by situation.

Xylene cyanol and Bromophenol blue are common dyes found in loading buffers ; they run about the same speed as DNA fragments that are 5000 bp and 300 bp in length respectively, but the precise position varies with percentage of the gel.