Classical Cepheids, Type II Cepheids, RR Lyrae variables and Delta Scutis belong to the instability strip which is believed to be driven by Eddington pulsations in helium, while for the Beta Cepheids the pulsation mechanism is unknown.

Classical Cepheids ( or Delta Cephei variables ) are population I yellow supergiants which undergo pulsations with very regular periods on the order of days to months.

Cepheid variables are divided into several subclasses which exhibit markedly different masses, ages, and evolutionary histories: Classical Cepheids, Type II Cepheids, Anomalous Cepheids, and Dwarf Cepheids.

Classical Cepheids ( also known as Population I Cepheids, Type I Cepheids, or Delta Cephei variables ) undergo pulsations with very regular periods on the order of days to months.

Classical Cepheids are population I variable stars which are 4 – 20 times more massive than the Sun, and up to 100, 000 times more luminous.

Classical Cepheids are used to determine distances to galaxies within the Local Group and beyond, and are a means by which the Hubble constant can be established.

Classical Cepheids are younger and more massive population I stars, whereas Type II Cepheids are older fainter population II stars.

Classical Cepheids and Type II Cepheids follow different period-luminosity relationships.

These unresolved matters have resulted in cited values for the Hubble constant ( established from Classical Cepheids ) ranging between 60 km / s / Mpc and 80 km / s / Mpc.

* Classical Cepheids include: Eta Aquilae, Zeta Geminorum, Beta Doradus, RT Aurigae, Polaris, as well as the namesake Delta Cephei.

Classical Cepheids discovered in the heavily-obscured dust lane of NGC 5128 yield a distance between ~ 3-3. 5 Mpc, depending on the nature of the extinction law adopted and other considerations.

Thus, while it remains possible that the Babylonians and/or the Pythagoreans may perhaps have had the magic square of three before the Chinese did, more definite evidence will have to turn up from the Middle East or the Classical World before China can lose her claim to the earliest known magic square by more than a thousand years.

Forlines has referred to this type of Arminianism as " Classical Arminianism ," while Picirilli, Pinson, and Ashby have termed it " Reformation Arminianism " or " Reformed Arminianism.

The Western suffix-e is from the Classical singular and the Eastern suffix-its is from the Classical plural ; both have been generalized for singular and plural in the dialects that use them.

* Classical fingerboards are normally flat and without inlaid fret markers, or just have dot inlays on the side of the neck — steel string fingerboards usually have a slight radius and inlays.

Classical critics have identified one of the earliest works of Cerberus as " the most imaginative ," that being a Laconian vase created around 560 BC in which Cerberus is shown with three-heads and with rows of serpents covering his body and heads.

Classical historians have dismissed Heraclitus the paradoxographer's explanation as " feeble ".

Classical columns have a bottom or plinth that rests on the stylobate or foundation.

Classical and flamenco guitars historically used gut strings but these have been superseded by polymer materials, such as nylon and fluorocarbon.

Classical Arabic did not have plain in its native words ( the palatalized form or is believed to have been used ), but the sound is standard in Modern Standard Arabic in Egypt, so as is the standard sound in Egyptian Arabic, in which loanwords are normally transcribed with ⟨⟩ ( Gīm ).

James Macpherson was the first Scottish poet to gain an international reputation, claiming to have found poetry written by Ossian, he published translations that acquired international popularity, being proclaimed as a Celtic equivalent of the Classical epics.

In 1985 Classical historian Georg Luck, in his Arcana Mundi: Magic and the Occult in the Greek and Roman Worlds, theorised that the origins of the Witch-cult may have appeared in late antiquity as a faith primarily designed to worship the Horned God, stemming from the merging of Cernunnos, a horned god of the Celts, with the Greco-Roman Pan / Faunus, a combination of gods which he posits created a new deity, around which the remaining pagans, those refusing to convert to Christianity, rallied and that this deity provided the prototype for later Christian conceptions of the Devil, and his worshippers were cast by the Church as witches.

European harmonica player Philip Achille, who performs Irish, Classical, Jazz, Qawali and sufi music, has won jazz competitions and his classical performances have led to appearances on the BBC as well as ITV and Channel 4.

Some scholars have suggested it is relevant to this debate that the legendary King Arthur's name only appears as Arthur, or Arturus, in early Latin Arthurian texts, never as Artōrius ( though it should be noted that Classical Latin Artōrius became Arturius in some Vulgar Latin dialects ).

Classical Latin Arcturus would also have become Art ( h ) ur when borrowed into Welsh, and its brightness and position in the sky led people to regard it as the " guardian of the bear " ( which is the meaning of the name in Ancient Greek ) and the " leader " of the other stars in Boötes.

In 1898, the Harpers Dictionary of Classical Antiquities described the structure as " the largest of all the temples of Egypt, the so-called Labyrinth, of which, however, only the foundation stones have been preserved.

Early labyrinths in India all follow the Classical pattern ; some have been described as plans of forts or cities.

Letter shapes have changed over the centuries, including the creation for Medieval Latin of lower case forms which did not exist in the Classical period.

Classical authors explained the summer flood by calculating the time it took for flood waters to move down a river, and calculating how long the Nile must have been for the waters to travel from a mountain range in the spring.

Commentators, as early as the Classical era, on have excused Noah ’ s excessive drinking because he was considered to be the first wine drinker, the first person to discover the soothing, consoling, and enlivening effects of wine.

Despite his importance to the myths and imaginative literature of ancient Greece, the religious cult of Prometheus during the Archaic and Classical periods seems to have been limited.

The main approaches in applying tests in these domains have been Classical Test Theory and the more recent Item Response Theory and Rasch measurement models.

Allomorphy can also exist in stems or roots, as in Classical Sanskrit:

According to Kapila Vatsyayan, " Classical Indian architecture, sculpture, painting, literature ( kāvya ), music, and dancing evolved their own rules conditioned by their respective media, but they shared with one another not only the underlying spiritual beliefs of the Indian religio-philosophic mind, but also the procedures by which the relationships of the symbol and the spiritual states were worked out in detail.

Classical methods ( also known as wet chemistry methods ) use separations such as precipitation, extraction, and distillation and qualitative analysis by color, odor, or melting point.

It has been described as the single most important and influential work in the West on Medieval and early Renaissance Christianity, and is also the last great Western work that can be called Classical.

Claudius also tried to revive the old custom of putting dots between successive words ( Classical Latin was written with no spacing ).

Classical liberals were also divided on free trade.

Classical education in this period also did not teach local languages and cultures.

Classical guitars also known as Spanish guitars are typically strung with nylon strings, plucked with the fingers, played in a seated position and are used to play a diversity of musical styles including classical music.

Classical authors also attributed to Hesiod a lengthy genealogical poem known as Catalogue of Women or Ehoiai ( because sections began with the Greek words ē hoiē, " Or like the one who ...").

In the Life Niese follows mainly manuscript P, but refers also to AMW and R. Henry St. John Thackery for the Loeb Classical Library has a Greek text also mainly dependent on P. André Pelletier edited a new Greek text for his translation of Life.

Classical music is also well known in Kosovo and has been taught at several music schools and universities ( at the University of Prishtina Faculty of Arts in Pristina and the University of Priština Faculty of Arts at Kosovska Mitrovica ).

A number of other ancient languages also used quantitative metre, such as Sanskrit and Classical Arabic ( but not Biblical Hebrew ).

During the Baroque and Classical periods, recitative could appear in two basic forms: secco ( dry ) recitative, accompanied only by continuo, which was usually a harpsichord and a cello ; or accompagnato ( also known as strumentato ) in which the orchestra provided accompaniment.

By the Classical period, the races were run by ephebes also in honor of Hephaestus and Athena.

Tetrahydrobiopterin is also a cofactor in the production of L-DOPA from Tyrosine and 5-Hydroxy-L-Tryptophan from Tryptophan, which must also be supplemented as treatment in addition to the supplements for Classical PKU.

Classical mechanics has also been extended into the complex domain, with complex classical mechanics exhibiting behaviors similar to quantum mechanics.

He also appears as a member of the jazz combo the Classical Jazz Quartet.

The Sony Classical release also featured an interactive CD-ROM component and website that complemented the work.

Samuel is also treated by the Classical Rabbis as a much more sympathetic character than he appears at face value in the Bible ; his annual circuit is explained as being due to his wish to spare people the task of having to journey to him ; Samuel is said to have been very rich, taking his entire household with him on the circuit so that he didn't need to impose himself on anyone's hospitality ; when Saul fell out of God's favour, Samuel is described as having grieved copiously and having prematurely aged.

Classical SH3 domains are restricted in humans to intracellular proteins, although the small human MIA family of extracellular proteins also contain a domain with an SH3-like fold.

** Classical Kuiper belt objects ( also called cubewanos ) have no such resonance, moving on almost circular orbits, unperturbed by Neptune.

He also wrote books of literary criticism, in particular Wordsworth ( 1881 ) and Essays, Classical and Modern ( in two volumes, 1883 ), which included a highly-regarded essay on Virgil.