5,068 research outputs found
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Copy of a Letter from Leonard Robert Palmer to Colin Henderson Roberts, June 10, 1964
No full textCopy of a letter from Palmer to Colin Henderson Roberts in the latter's capacity as secretary of the Delegates to the Oxford University Press, protesting Bennett's written criticism of Palmer's forthcoming On the Knossos Tablets and Bennett's proposed corrections.Classic
Colin Humphris
No full text"Colin Humphris 2 Sqdrn. RAAF. 1941 - 1942 Author of - 'Trapped on Timor' (as a result of bombing of Darwin Feb. 19, 1942)".Colin Humphris. 2 Squadron, Royal Australian Air Force 1941 - 1942. Author of - 'Trapped on Timor' (as a result of bombing of Darwin February 19, 1942)
Interview with Colin Wilson, part 4, undated
No full textInterview with Colin Wilson, part 4, features an interview with author Colin Wilson in which he discusses his views regarding society and art, his reclusive nature, and the intellectual and fantastical elements of his works, undated
Interview with Colin Wilson, part 2, undated
No full textInterview with Colin Wilson, part 2, features an interview with author Colin Wilson in which he discusses his views regarding society and art, his reclusive nature, and the intellectual and fantastical elements of his works, undated
Constraints on the wing morphology of pterosaurs
No full textAnimals that fly must be able to do so over a huge range of aerodynamic conditions, determined by weather, wind speed and the nature of their environment. No single parameter can be used to determine—let alone measure—optimum flight performance as it relates to wing shape. Reconstructing the wings of the extinct pterosaurs has therefore proved especially problematic: these Mesozoic flying reptiles had a soft-tissue membranous flight surface that is rarely preserved in the fossil record. Here, we review basic mechanical and aerodynamic constraints that influenced the wing shape of pterosaurs, and, building on this, present a series of theoretical modelling results. These results allow us to predict the most likely wing shapes that could have been employed by these ancient reptiles, and further show that a combination of anterior sweep and a reflexed proximal wing section provides an aerodynamically balanced and efficient theoretical pterosaur wing shape, with clear benefits for their flight stability
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Letter from Leonard Robert Palmer to Emmett L. Bennett, Jr., June 11, 1964
No full textDistressed letter in which Palmer dismisses Bennett's criticisms of the former's forthcoming On the Knossos Tablets as trivial and orders Bennett to withdraw his review.
Copies of Palmer's June 10, 1964 letter to Colin Henderson Roberts of the Oxford University Press and June 11, 1964 letter to Robert William Hamilton of the Ashmolean Museum were sent alongside this letter and are companion pieces to it.Classic
Biomechanics of the unique pterosaur pteroid
No full textPterosaurs, flying reptiles from the Mesozoic, had wing membranes that were supported by their arm bones and a super-elongate fourth finger. Associated with the wing, pterosaurs also possessed a unique wrist bone—the pteroid—that functioned to support the forward part of the membrane in front of the leading edge, the propatagium. Pteroid shape varies across pterosaurs and reconstructions of its orientation vary (projecting anteriorly to the wing leading edge or medially, lying alongside it) and imply differences in the way that pterosaurs controlled their wings. Here we show, using biomechanical analysis and considerations of aerodynamic efficiency of a representative ornithocheirid pterosaur, that an anteriorly orientated pteroid is highly unlikely. Unless these pterosaurs only flew steadily and had very low body masses, their pteroids would have been likely to break if orientated anteriorly; the degree of movement required for a forward orientation would have introduced extreme membrane strains and required impractical tensioning in the propatagium membrane. This result can be generalized for other pterodactyloid pterosaurs because the resultant geometry of an anteriorly orientated pteroid would have reduced the aerodynamic performance of all wings and required the same impractical properties in the propatagium membrane. We demonstrate quantitatively that the more traditional reconstruction of a medially orientated pteroid was much more stable both structurally and aerodynamically, reflecting likely life position
Colin A. Palmer, Slaves of the white God. Blacks in Mexico, 1570-1640
No full textMahn-Lot Marianne. Colin A. Palmer, Slaves of the white God. Blacks in Mexico, 1570-1640. In: Annales. Économies, Sociétés, Civilisations. 35ᵉ année, N. 6, 1980. pp. 1207-1208
Colin A. Palmer, Slaves of the white God. Blacks in Mexico, 1570-1640
No full textMahn-Lot Marianne. Colin A. Palmer, Slaves of the white God. Blacks in Mexico, 1570-1640. In: Annales. Économies, Sociétés, Civilisations. 35ᵉ année, N. 6, 1980. pp. 1207-1208
Country boats of the Ganges Delta – an ethnographic study of inland navigation
No full textArticle that addresses the variety in boat construction in the context of Bangladesh
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