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second and principal
Naming the central ray passing through the entrance pupil the axis of the pencil or principal ray, it can be said: the rays of the pencil intersect, not in one point, but in two focal lines, which can be assumed to be at right angles to the principal ray ; of these, one lies in the plane containing the principal ray and the axis of the system, i. e. in the first principal section or meridional section, and the other at right angles to it, i. e. in the second principal section or sagittal section.
Barcelona is the transport hub with one of Europe's principal ports, Barcelona international airport, which handles above 34 million passengers per year, extensive motorway network and also is a hub of high-speed rail, particularly that which is intended to link Spain with France and the rest of Europe as the second longest in the world.
The Bronze Age is the second principal period of the three-age system, as proposed in modern times by Christian Jürgensen Thomsen, for classifying and studying ancient societies.
Price's dichotomy dictates the second stage commenced with August Derleth, the principal difference between Lovecraft and Derleth being the latter's use of hope and that the Cthulhu mythos essentially represented a struggle between good and evil.
The country's principal export crops are the spices nutmeg and mace ( Grenada is the world ’ s second largest producer of nutmeg after Indonesia ).
In Roman law, the " contractor himself was considered the party to the contract and it took a second contract between the person who acted on behalf of a principal and the latter in order to transfer the rights and the obligations deriving from the contract to him ".
Notice that neither the square root nor the principal square root function is the inverse of x < sup > 2 </ sup > because the first is not single-valued, and the second returns-x when x is negative.
* The second dates to the Battle of Flodden in 1513 (" a landmark in the history of archery, as the last battle on English soil to be fought with the longbow as the principal weapon ...").
The second are magmatic sulfide deposits where the principal ore mineral is pentlandite: ( Ni, Fe )< sub > 9 </ sub > S < sub > 8 </ sub >.
The violins are divided into two groups, first violin and second violin, each with its principal.
A recent analysis of survey data using principal component analysis was carried out in 2003 in the UK ; the results of this study yielded the same two dimensions as found by Eysenck's original research: the familiar " left-right " R-dimension that mixes economic issues and social issues, and a second T-dimension that is described as " pragmatism vs idealism.
The Río Negro's principal tributary and the country's second most important river is the Yí River ( Río Yí ).
Princess Margaret was portrayed by Lucy Cohu in the Channel 4 TV drama The Queen's Sister ( 2005 ), by Trulie MacLeod in the TV drama The Women of Windsor ( 1992 ), and by Hannah Wiltshire in the TV drama Bertie and Elizabeth ; she is portrayed silently in the second series première of Ashes to Ashes ( 2009, set in 1982 ) and subsequently complains off-camera about one of the principal characters.
The most important function of these DNS servers is the translation ( resolution ) of human-memorable domain names and hostnames into the corresponding numeric Internet Protocol ( IP ) addresses, the second principal Internet name space which is used to identify and locate computer systems and resources on the Internet.
However, the complete theory of the Abbe sine condition shows that if a lens is corrected for coma and spherical aberration, as all good photographic objectives must be, the second principal plane becomes a portion of a sphere of radius f centered about the focal point, ..." In this sense, the traditional thin-lens definition and illustration of f-number is misleading, and defining it in terms of numerical aperture may be more meaningful.
Among his followers, his own protégé Marcelo Nisinman is the best known innovator of the tango music of the new millennium, while Pablo Ziegler, pianist with Piazzolla's second quintet, has assumed the role of principal custodian of nuevo tango, extending the jazz influence in the style.
The AOSF program allowed students to complete the AMSP in their first year and then serve as the " principal instructor " for the AMSP during their second year.
Before he died, Robert, his only surviving son by his second wife, was ready to step into his shoes as the Queen's principal adviser.
EUMETSAT, the European Organisation for the Exploitation of Meteorological Satellites, operates the principal European meteorological satellites from its headquarters, including the first and second generations of Meteosat geostationary satellites, and the polar-orbiting Metop series.
The principal agricultural product of St. Kitts is sugarcane ; peanuts are now the second crop.
Micos ruled with the assistance of micalgi or lesser chiefs, and various advisors, including a second in charge called the heniha, respected village elders, medicine men, and a tustunnuggee or ranking warrior, the principal military advisor.

second and component
Three elements have been important in holding the Communion together: First, the shared ecclesial structure of the component churches, manifested in an episcopal polity maintained through the apostolic succession of bishops and synodical government ; second, the principle of belief expressed in worship, investing importance in approved prayer books and their rubrics ; and third, the historical documents and standard divines that have influenced the ethos of the Communion.
In the form of proteins, amino acids comprise the second largest component other than water of human muscles, cells and other tissues.
* baio-warioz: the first component is most plausibly explained as a Germanic version of Boii ; the second part is a common formational morpheme of Germanic tribal names, meaning ' dwellers ', as in Anglo-Saxon-ware ); this combination " Boii-dwellers " may have meant " those who dwell where the Boii formerly dwelt ".
, djbdns's tinydns component was the second most popular DNS server ( number of served domain ).
The vocalization of the second name component may be read as Hoshea-the name used in the Torah before Moses added the divine name ().
With second wave feminism and growth of scholarship in women's history and sexuality in the 20th century, the definition of lesbian broadened, sparking a debate about sexual desire as the major component to define what a lesbian is.
In addition to serving as a primary component of cellular membranes and binding sites for intra-and intercellular proteins, some glycerophospholipids in eukaryotic cells, such as phosphatidylinositols and phosphatidic acids are either precursors of or, themselves, membrane-derived second messengers.
For example, consider the weighted mean of the point 0 with high variance in the second component and 1 with high variance in the first component.
which makes sense: the 0 estimate is " compliant " in the second component and the 1 estimate is compliant in the first component, so the weighted mean is nearly 1.
It can be shown using the Gibbs – Duhem equation that if Raoult's law holds over the entire concentration range x = 0 – 1 in a binary solution then, for the second component, the same must also hold.
We can also define it as a second component of business which includes all activities, functions and institutions involved in transferring goods from producers to consumer.
In 1780, for example, Laplace and Lavoisier stated: “ In general, one can change the first hypothesis into the second by changing the words ‘ free heat, combined heat, and heat released ’ into ‘ vis viva, loss of vis viva, and increase of vis viva .’” In this manner, the total mass of caloric in a body, called absolute heat, was regarded as a mixture of two components ; the free or perceptible caloric could affect a thermometer, whereas the other component, the latent caloric, could not.
This E2 component is an " intermediate time " pulse that, by the IEC definition, lasts from about 1 microsecond to 1 second after the beginning of the electromagnetic pulse.
The most significant risk is synergistic, because the E2 component follows a small fraction of a second after the first component's insult, which has the ability to impair or destroy many protective and control features.
The energy associated with the second component thus may be allowed to pass into and damage systems.
power gain of the second component in the cascade
The first basis function is used as the in-phase component of the signal and the second as the quadrature component of the signal.
The reflection coefficient can be calculated using:, where is the reflection coefficient ( 0 denotes full transmission, 1 full reflection, and 0. 5 is a reflection of half the incoming voltage ), and are the impedance of the first component ( from which the wave enters ) and the second component, respectively.
The second component of the wireless system, the receiver, detects the sound and sends the sound to the ear of the person with the hearing loss.
A second component, a C-shaped hard rubber ring, is located between the crescent and the barrel.

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