957 resultados para Heelu, Jan van.
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Title vignette (printer's device)
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Editor's note (p. 137) signed: C.A. Wijnschenk dom.
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CCBE s. XVI
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Mode of access: Internet.
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Mode of access: Internet.
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Mode of access: Internet.
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Mode of access: Internet.
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Mode of access: Internet.
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Includes indexes.
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Mode of access: Internet.
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Large uncertainties remain in the current and future contribution to sea level rise from Antarctica. Climate warming may increase snowfall in the continent's interior, but enhance glacier discharge at the coast where warmer air and ocean temperatures erode the buttressing ice shelves. Here, we use satellite interferometric synthetic-aperture radar observations from 1992 to 2006 covering 85% of Antarctica's coastline to estimate the total mass flux into the ocean. We compare the mass fluxes from large drainage basin units with interior snow accumulation calculated from a regional atmospheric climate model for 1980 to 2004. In East Antarctica, small glacier losses in Wilkes Land and glacier gains at the mouths of the Filchner and Ross ice shelves combine to a near-zero loss of 4 ± 61 Gt/yr. In West Antarctica, widespread losses along the Bellingshausen and Amundsen seas increased the ice sheet loss by 59% in 10 years to reach 132 ± 60 Gt/yr in 2006. In the Peninsula, losses increased by 140% to reach 60 ± 46 Gt/yr in 2006. Losses are concentrated along narrow channels occupied by outlet glaciers and are caused by ongoing and past glacier acceleration. Changes in glacier flow therefore have a significant, if not dominant impact on ice sheet mass balance.
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This thesis is a study of fifteenth- to mid sixteenth-century Netherlandish triptych exteriors, focusing on the so-called ‘grisaille’ technique. During this period, altarpieces produced in the Low Countries were typically constructed in a tripartite format with folding wings. This arrangement created the opportunity for pictorial representations on both sides of the hinged panels. Painters emphasized the distinction between the triptych’s two faces by executing the exteriors in a strikingly more subdued palette than the interiors. Particular iconographic subject matter was favoured for grisailles, which often depict the Annunciation or saints that reflect the triptych’s patronage or intended location. Jan van Eyck was notable for his emphasis on imitating stone statuary and created three important grisailles, one of which would influence triptych exteriors for years to come. Hieronymus Bosch, an artist working at the turn of the sixteenth century, also brought innovation to his grisailles, further expanding the potential of these reduced-palette paintings. This thesis examines the creative process involved in the production of grisailles and compares the underdrawings of triptych exteriors to those of the corresponding polychromatic interiors. In this study, grisailles are situated in their context as part of multifaceted artworks as well as within the broader church environment. New infrared reflectograms were generated using Queen’s OSIRIS infrared camera to document works in Belgium and the Netherlands. While some aspects of underdrawings could indicate that the figure was meant to imitate statuary, this distinction was not directly linked to triptych exteriors and was related instead to efforts at a trompe-l’oeil effect. Such attempts at mimicry can also be found on triptych interiors. Through a close examination of the underdrawing stage of these paintings it appears that this part of the creative process was not distinguished in any significant way from the underdrawings of triptych interiors.