Deep Scattering Layers
The Oxford Companion to Ships and the Sea
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2006
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© The Oxford Companion to Ships and the Sea 2006, originally published by Oxford University Press 2006. (Hide copyright information)
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Deep Scattering Layers (DSLs) appear on
echo sounders and other
sonar devices, and often resemble a false bottom. Immediately after the Second World War (1939–45)
shoals shallow enough to be a danger to shipping were shown on some
charts of the open ocean, because very dense DSLs were mistaken by
chartmakers for shallows. DSLs are the result of the sound transmissions of the echo sounder being reflected by dense concentrations of
fish or
plankton. Fishes with swim-bladders containing gas bubbles reflect the sounds efficiently, especially if the diameter of the gas bubble is more than half the wavelength of frequency of the transmitted sound. The higher the frequency of sound used, the smaller the organisms that reflect the sound. Some DSLs ‘behave’ in that they migrate up towards the surface at dusk and sink down again at dawn, indicating that the animals causing them are undertaking vertical migrations.
M. V. Angel
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Perugino, the divine painter
Newspaper article from: International Herald Tribune; 5/15/2004; ; 700+ words
; ...leveled against Pietro Vannucci, known as Perugino after the principal city of his native...denigration was the Tuscan Giorgio Vasari.Perugino's most famous pupils were Raphael and...artists who drew directly and indirectly on Perugino's works.But the tendency to look...
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Perugino: 'Il divin Pittore': a comprehensive exhibition of Perugino in his adopted city is notable for the reunification of altarpiece fragments or works intended to hang together.(Exhibitions)
Magazine article from: Apollo; 6/1/2004; ; 700+ words
; ...APOLLO was first published, in 1925, Perugino wax still regarded as one of the greatest...disadvantages: the frescoes which are among Perugino's absolute masterpieces cannot he moved...of France. In the past half century Perugino's early work has been the subject of...
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Perugino Bay Wins U.S. Debut
News Wire article from: AP Online; 7/1/1999; 300 words
; AP Online 07-01-1999 Perugino Bay Wins U.S. Debut INGLEWOOD, Calif. (AP) -- Irish-bred Perugino Bay, making his U.S. debut, won...race on the turf at Hollywood Park. Perugino Bay, ridden by Kent Desormeaux, beat...
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Perugino Remains in Coma After Surgery
News Wire article from: AP Online; 2/13/2003; 224 words
; ...Unbeaten Italian middleweight Antonio Perugino remained in a coma Thursday after six...a full recovery. Fontana operated on Perugino at the Morelli hospital in nearby Sondalo...for a few more days, Fontana said. Perugino collapsed hours after beating Argentina...
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 "AAP Sports News (Australia)")
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Box: Perugino commits suicide
Newspaper article from: AAP Sports News (Australia); 1/23/2001; 194 words
; ...News (Australia) 01-23-2001 Box: Perugino commits suicide CASERTE, Italy, Jan...superfeatherweight boxing champion Prisco Perugino has committed suicide, according to...press reports today. The 28-year-old Perugino was found on a railway track in the southern...
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De Perugino a Monet. (exposición de arte en el Banco Bilbao Vizcaya en Madrid, España)(TT: From Perugino to Monet) (TA: art exhibition in the Banco Bilbao Vizcaya in Madrid, Spain)
Magazine article from: Tribuna de Actualidad; 12/15/1997; ; 700+ words
; ...Artes de Budapest. Ahora se ha organizado la exposicin De Perugino a Monet. Obras maestras del Museo de Bellas Artes de Caen...inicia con San Jernimo en el desierto (1499-1502), de Perugino, y la tabla Santiago el Mayor, de Cosimo Tura, para dar...
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De Perugino a Monet, cinco siglos de creaciones. (pintura; otoño cultural del Banco Bilbao Vizcaya; España)(TT: From Perugino to Monet, five centuries of creations) (TA: painting; the cultural fall of Banco Bilbao Vizcaya; Spain)
Magazine article from: Tribuna de Actualidad; 1/5/1998; 624 words
; ...BBV en Madrid (Paseo de la Castellana, 81) la exposicin De Perugino a Monet. Obras maestras del Museo de Bellas Artes de Caen...hasta el Impresionismo. El itinerario se inicia con cuadros de Perugino y Cosme Tura, ambos maestros del Quattrocento, para proseguir...
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 "The Racing Post (London, England)")
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Bullard's Ir54,000gns lands Perugino colt.(Sports)
Newspaper article from: The Racing Post (London, England); 9/23/1998; ; 700+ words
; ...Curragh Bloodstock Agency to buy a nice Perugino colt from the Castletown Stud for Ir54...pedigree in the book and because I rate Perugino the best of the first-season sires...s brother paid Ir19,000gns for a Perugino colt closely related to David Elsworth...
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De Perugino a Monet. (pintura; Banco Bilbao Vizcaya, Madrid, España)(TT: From Perugino to Monet) (TA: painting; Bilbao Vizcaya Bank, Madrid, Spain)
Magazine article from: Epoca; 12/22/1997; 554 words
; ...Madrid y que viajar despus a Bilbao. La exposicin se titula De Perugino a Monet y supone un escogido recorrido por la pintura europea...Pietro Vanucci, pintor de Perugia -de ah el sobrenombre de Perugino con el que se le conoci- en el siglo XV, al estanque de nenfares...
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Sales Report: Bullard's Ir54,000gns lands Perugino colt.(Sports)
Newspaper article from: The Racing Post (London, England); 9/23/1998; ; 700+ words
; ...Curragh Bloodstock Agency to buy a nice Perugino colt from the Castletown Stud for Ir54...pedigree in the book and because I rate Perugino the best of the first-season sires...s brother paid Ir19,000gns for a Perugino colt closely related to David Elsworth...
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Perugino
Encyclopedia entry from: Encyclopedia of World Biography
Perugino Perugino (ca. 1450-1523) was a leading central Italian painter whose art anticipated that of the High Renaissance. Pietro Vannucci, called Perugino was born in Città della Pieve near Perugia. According to Giorgio...
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Perugino (1450–1523)
Book article from: The Renaissance
Perugino (1450 – 1523) Italian painter...the poses give this and other works of Perugino a sense of philosophical dignity and calm...the Sistine Chapel commission ended, Perugino moved to Florence, where he completed...
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Perugino, Pietro
Book article from: The Oxford Dictionary of Art
Perugino, Pietro ( Pietro Vannucci ) ( b Citt...but some modern scholars think that Perugino was more likely to have been leader...His reputation firmly established, Perugino received commissions from various places...
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Perugino, Pietro Vannucci
Book article from: The Concise Oxford Dictionary of the Christian Church
Perugino, Pietro Vannucci ( c. 1446–1523), Italian painter. In 1482 he painted the Delivery of the Keys to St Peter in...
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Raphael
Book article from: The Oxford Dictionary of Art
...overwhelming influence on his early work was Perugino . Raphael took from him not only general...trees. According to Vasari, Raphael was Perugino's pupil, but this is perhaps not strictly...was only 17; his close contact with Perugino seems to have come a little later ( c...
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