quaternion
quaternion , in mathematics, a type of higher complex number first suggested by Sir William R. Hamilton in 1843. A complex number is a number of the form a + bi when a and b are real numbers and i is the so-called imaginary unit defined by the equation i2 =-1. The rules for operating with complex numbers are simply those of operating with the polynomial a + bx except that i2 is replaced by -1 whenever it occurs. A quaternion, an extension of this concept, is a number of the form a + bi + cj + dk when a, b, c, and d are real numbers and i, j, and k are imaginary units defined by the equations i2 = j2 = k2 = ijk =-1. Quaternions, as well as vectors and tensors (later outgrowths of the concept of quaternions), have many important applications in mechanics.
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Finding Their Faith Beneath the Surface; Immersion Baptistery Is Central to Worship at Ashburn Church
Newspaper article from: The Washington Post; 9/4/2005; ; 700+ words
; ...his first full-immersion baptistery, which measures 14 feet...s, estimated that the baptistery added $20,000 to the cost...You can buy prefabricated baptisteries, but they end up looking...congregations have used the baptistery. Grace Bible Church, which...
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Renaissance masterpiece, missed in Florence, turns up in New York.(ART)(doors of Baptistery of San Giovanni)
Magazine article from: National Catholic Reporter; 11/23/2007; ; 700+ words
; ...which I later learned is called the Baptistery, could easily be dismissed. It was...scarves. A glance in the direction of the Baptistery was enough to tell me that this was...we had paid scant attention to the Baptistery. We later learned what more seasoned...
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RESTORED BAPTISTERY IS UNVEILED
Newspaper article from: Belfast Telegraph; 1/12/2009; ; 629 words
; ...Church in Derry has unveiled its restored baptistery - 100 years after it was first installed...Long Tower Church opened in 1909, the baptistery was described as the gem of the church...Tower, the font was moved out of the baptistery and placed in the body of the church...
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Pagezimorja e Butrintit dhe Mozaiket e saj/The Butrint Baptistery and Its mosaics.(Brief article)(Book review)
Magazine article from: Reference & Research Book News; 11/1/2008; 510 words
; ...Butrintit dhe Mozaiket e saj/The Butrint Baptistery and its mosaics. Mitchell, John...Paperback NA3770 The sixth-century baptistery of Butrint on the Albanian coast is...Erected over a Roman bathhouse, the baptistery demonstrates the wealth and piety of...
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THE BAPTISTERY.(Poem)
Magazine article from: Quadrant; 9/1/2000; ; 425 words
; ...patron saint parades his godchild, gently proud. I am drawn to emptiness in a classical shape: by the marble bowl of the baptistery a vacant niche is filling with purple shadow; if I watch it will overflow. Two women, twinning their gestures, turn with...
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Castles in the sky
Newspaper article from: The Independent - London; 7/9/1996; ; 700+ words
; ...kept turning back to a design for a Baptistery this brilliant Baroque architect wanted...around with a wedge-shaped piazza. The Baptistery would have been the pivot at the west...through Hawksmoor's arcades. The Baptistery itself is a handsome circular building...
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A Pre-Raphaelite gem in New York City.(The Church of Saint Ignatius Loyola.)
Magazine article from: The Magazine Antiques; 4/1/2005; ; 700+ words
; ...and Italian artists and artisans, the Baptistery-Chapel of Saint John the Baptist is...Renaissance prototypes, the circular baptistery-chapel (Fig. 2) was completed in...Venice, supervised the project. The baptistery-chapel consists of a semicircular...
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The Audience and Civic-Religious Celebration in Tuscany
Magazine article from: Western European Stages; 4/1/2004; ; 700+ words
; ...which houses the cathedral and the Baptistery of San Giovanni. The procession is...the time the procession reaches the Baptistery there is a larger crowd of onlookers...from the larger house of worship to the Baptistery, their passageway lined by flag bearers...
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 "Post-Tribune (IN)")
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Renaissance masterpiece on tour\
Newspaper article from: Post-Tribune (IN); 4/26/2007; ; 700+ words
; ...for one set of doors in Florence's Baptistery, are the hinges of a pivotal moment...bronze 31-square-inch panels in the Baptistery eastern doors, weighing about 200 pounds...copies have been installed in the Baptistery. All panels tell Old Testament stories...
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 "Chicago Tribune (Chicago, IL)")
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The divine, divided: Art Institute displays pieces of 'Gates of Paradise'.
Newspaper article from: Chicago Tribune (Chicago, IL); 8/5/2007; 700+ words
; ...second pair of doors he created for the Baptistery, the civic and religious center of...which runs from the construction of the Baptistery to Ghiberti's death); seven paintings...copies have stood in their place at the Baptistery.) "They are beautiful enough for...
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baptistery
Book article from: The Columbia Encyclopedia, Sixth Edition
baptistery , part of a church...many subsequent baptisteries, most of which...immersion. Early baptisteries are chiefly found...Italy separate baptisteries continued to be...Parma. For the baptistery at Florence Andrea...
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Lorenzo Ghiberti
Encyclopedia entry from: Encyclopedia of World Biography
...called the Gates of Paradise, of the Baptistery of Florence are a supreme monument to...gilded bronze north doors of the Florence Baptistery and won it. The theme was the sacrifice...created the first truly Renaissance nude. Baptistery North Doors When the commission was...
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Andrea Pisano
Encyclopedia entry from: Encyclopedia of World Biography
...the first set of bronze doors for the Baptistery in Florence. He was capomastro of the...His Works The bronze doors of the Baptistery, which now adorn the south portal...responsible for the decoration of the Baptistery, was sent to Pisa to study the doors...
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Donatello
Encyclopedia entry from: U*X*L Encyclopedia of World Biography
...surface) of the doors of the Florentine Baptistery. By 1407 he had left Ghiberti for the...completed in 1427 for the font in the Baptistery, Siena. Ghiberti, Jacopo della Quercia...executed reliefs for the front of the Baptistery. In Donatello's very low relief composition...
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Filippo Brunelleschi
Encyclopedia entry from: Encyclopedia of World Biography
...1401 for a new set of portals for the Baptistery in Florence; his trial piece, the...lost): one depicted the Florentine Baptistery as viewed from the Cathedral portal...in 1427 to advise on the dome of the Baptistery. The Pazzi Chapel (1429-1467...
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