Radiology PDF Download

Author:
Publisher:
ISBN:
Category : Radiology, Medical
Languages : en
Pages : 720

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Author: Sir Norman Lockyer
Publisher:
ISBN:
Category : Electronic journals
Languages : en
Pages : 1196

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Author: Klaus Hentschel
Publisher: Springer
ISBN: 3319952528
Category : Science
Languages : en
Pages : 239

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This book focuses on the gradual formation of the concept of ‘light quanta’ or ‘photons’, as they have usually been called in English since 1926. The great number of synonyms that have been used by physicists to denote this concept indicates that there are many different mental models of what ‘light quanta’ are: simply finite, ‘quantized packages of energy’ or ‘bullets of light’? ‘Atoms of light’ or ‘molecules of light’? ‘Light corpuscles’ or ‘quantized waves’? Singularities of the field or spatially extended structures able to interfere? ‘Photons’ in G.N. Lewis’s sense, or as defined by QED, i.e. virtual exchange particles transmitting the electromagnetic force? The term ‘light quantum’ made its first appearance in Albert Einstein’s 1905 paper on a “heuristic point of view” to cope with the photoelectric effect and other forms of interaction of light and matter, but the mental model associated with it has a rich history both before and after 1905. Some of its semantic layers go as far back as Newton and Kepler, some are only fully expressed several decades later, while others initially increased in importance then diminished and finally vanished. In conjunction with these various terms, several mental models of light quanta were developed—six of them are explored more closely in this book. It discusses two historiographic approaches to the problem of concept formation: (a) the author’s own model of conceptual development as a series of semantic accretions and (b) Mark Turner’s model of ‘conceptual blending’. Both of these models are shown to be useful and should be explored further. This is the first historiographically sophisticated history of the fully fledged concept and all of its twelve semantic layers. It systematically combines the history of science with the history of terms and a philosophically inspired history of ideas in conjunction with insights from cognitive science.

Author: Maurice de Broglie
Publisher:
ISBN:
Category : Atoms
Languages : fr
Pages : 252

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Author: Ernest Albert-Weil
Publisher:
ISBN:
Category : Radiotherapy
Languages : fr
Pages : 518

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Author: Ernest Albert-Weil
Publisher:
ISBN: 9782329999951
Category :
Languages : fr
Pages : 0

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Éléments de radiologie: diagnostic et thérapeutique par les rayons X / par le Dr E. Albert-Weil, ... Date de l'édition originale: 1914 Le présent ouvrage s'inscrit dans une politique de conservation patrimoniale des ouvrages de la littérature Française mise en place avec la BNF. HACHETTE LIVRE et la BNF proposent ainsi un catalogue de titres indisponibles, la BNF ayant numérisé ces oeuvres et HACHETTE LIVRE les imprimant à la demande. Certains de ces ouvrages reflètent des courants de pensée caractéristiques de leur époque, mais qui seraient aujourd'hui jugés condamnables. Ils n'en appartiennent pas moins à l'histoire des idées en France et sont susceptibles de présenter un intérêt scientifique ou historique. Le sens de notre démarche éditoriale consiste ainsi à permettre l'accès à ces oeuvres sans pour autant que nous en cautionnions en aucune façon le contenu. Pour plus d'informations, rendez-vous sur www.hachettebnf.fr

Author: Pierre Loisel
Publisher:
ISBN:
Category : Ionizing radiation
Languages : fr
Pages : 166

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Author: Hyacinthe Guilleminot
Publisher:
ISBN:
Category : Radiation
Languages : fr
Pages : 352

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Author: Joseph Selman
Publisher:
ISBN:
Category : Ionizing radiation
Languages : en
Pages : 372

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Author: Charles-Édouard Guillaume
Publisher:
ISBN:
Category : Radiography
Languages : fr
Pages : 182

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