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 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 have also been used to clarify many characteristics of our galaxy, such as the Sun's height above the galactic plane and the Galaxy's local spiral structure.

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.

" Other prestigious architectural awards are the Aga Khan Award for Architecture, the Richard H. Driehaus Prize for Classical Architecture, the Alvar Aalto Medal ( Finland ), the Carlsberg Architecture Prize ( Denmark ), and the Governor General's Awards ( Canada ).

Classical Arminianism, which sees Arminius as the main contributor, and Wesleyan Arminianism, which sees John Wesley as the main contributor, are the two main outlooks on how the system is realistic in detail.

The Amazons (, Amazónes, singular, Amazōn ) are a nation of all-female warriors in Greek mythology and Classical antiquity.

Among Classical Greeks, amazon was given a popular etymology as from a-mazos, " without breast ", connected with an etiological tradition that Amazons had their left breast cut off or burnt out, so they would be able to use a bow more freely and throw spears without the physical limitation and obstruction ; there is no indication of such a practice in works of art, in which the Amazons are always represented with both breasts, although the left is frequently covered ( see photos in article ).

Various conflicting accounts are given in Classical Greek mythology of the birth of Artemis and her twin brother, Apollo.

Beethoven changes the usual pattern of Classical symphonies in placing the scherzo movement before the slow movement ( in symphonies, slow movements are usually placed before scherzi ).

Classical particles with this energy distribution are said to obey Maxwell – Boltzmann statistics.

Classical Chinese astronomy is recorded in the Han period and appears in the form of three schools, which are attributed to astronomers of the Zhanguo period.

The dates of the Classical period in Western music are generally accepted as being between about 1750 and 1820.

Bach and Gluck are often considered to be founders of the Classical style.

* 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 approximations to the potential energy surface are employed, as they are computationally less intensive than electronic calculations, to enable longer simulations of molecular dynamics.

Classical liberalism holds that individual rights are natural, inherent, or inalienable, and exist independently of government.

They are the Assakenoi and Aspasioi of the Classical writings, and the Ashvakayanas and Ashvayanas in Pāṇini's Ashtadhyayi.

For example, in one of the Four Great Classical Novels of China, The Dream of the Red Chamber ( believed to be a semi-autobiographical account of author Cao Xueqin's own family life ), three generations of the Jia family are supported by one favorite concubine of the Emperor.

The Letters are available in the Loeb Classical Library, translated by Allen Rogers Benner and Francis H. Fobes ( 1949 ).

Whilst critical theorists usually are defined as Marxist intellectuals, their tendency to denounce Marxist concepts, and to synthesise Marxian analysis with other sociologic and philosophic traditions has been attacked as revisionism, by Classical, Orthodox, and Analytical Marxists, and by Marxist-Leninist philosophers.

Today clavichords are played primarily by Renaissance, Baroque, and Classical music enthusiasts.

Classical objects are defined as not resonant and not being currently scattered by Neptune.

Since there are no punctuation marks in Classical Chinese, it can be difficult to conclusively determine where one sentence ends and the next begins.

Classical training methods vary by country: many of the major European countries are associated with specific methods ( e. g., the Edouard Nanny method in France or the Franz Simandl method in Germany ).

Classical analog filters are IIR filters, and classical filter theory centers on the determination of transfer functions given by low order rational functions, which can be synthesized using the same small number of reactive components.

Classical empiricists generally held that such reports are indubitable and incorrigible and therefore worthy of serving as epistemologically basic propositions.

In the written style known as kanbun, which is the Japanese approximation of Classical Chinese, small marks called kunten are sometimes added as reading aids.

Classical Arab music is extremely popular across the population, especially a small number of superstars known throughout the Arab world.

It is certain that Classical Athens had the largest slave population, with as many as 80, 000 in the 6th and 5th centuries BC ; two to four-fifths of the population were slaves.

Classical objects seem to be composed of two different colour populations: the so-called cold ( inclination < 5 °) population, displaying only red colours, and the so-called hot ( higher inclination ) population displaying the whole range of colours from blue to very red.

It is estimated that in later Classical Sparta, when the male population was in serious decline, women were the sole owners of at least 35 % of all land and property in Sparta.

Two-fifths ( some authorities say four-fifths ) of the population of Classical Athens were slaves.

The Classical economists took the theory of the determinants of the level and growth of population as part of Political Economy.

The Ionians (, Íōnes, singular, Íōn ) were one of the four major Greek tribes into which the Classical Greeks considered the population of Hellenes to have been divided ( along with the Dorians, Aeolians and Achaeans ).

Classical test theory is concerned with the relations between the three variables,, and in the population.

Here at least explains, from the Classical viewpoint, its approximate method with a large amount of traditional rationality for its oeuvre heavily reliant on tradition to make conclusions ' as final decisions ' towards conclusions. Foucault uses a rather unusual method involving oeuvre de la obscure meaning the ' obscure ' is seen as the building block for human rationality functioning as norms which become familiar to people, giving the uninformed their ' view ' and ' truth ' of the world. The uninformed means the uninformed who have no direct access to policy decision making therefore condemning those who work into a continuous comatose ignorance producing this network of power systems creating what Marx called ' labour power ' which recreate and recycle a functioning society ( comparable to a living breathing organism ) and the population of producers who have no monetary resources and ownership of capital wealth ; ownership of mines, banks, transportation equipment and machinery, such as aeroplanes car manufacturers and industry and therefore are confined to the bottom of the hiercharchical pyramid, producing the problematization of a society comparable to Ants or Bees which inform evolutionary biology, for example of human nature. While inaccurate and now known to be scientifically flawed, nevertheless it remains ' true ' from the classical perspective as opposed to the working population who are not uneducated or illiterate a wall which can be pieced.