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..". Je dis a l'interprete, le medecin susdit: Dis a notre Seigneur le Sultan, jamais personne n'abandonne sa religion, sans que ses coreligionnaires n'elevent la voix contre lui et ne le calomnient; je reclame donc de ta bienveillance de bien vouloir faire chercher les negociants Chretiens et les autres notables qui se trouvent dans ta capitale et de les interroger a mon sujet, de cette facon tu entendras ce qu'ils disent sur mon compte; apres cela j'embrasserai l'Islam. Le sultan me repondit par l'intermediaire de l'interprete: Tu me fais la meme demande que 'Abd Allah ben Salam fit au...

Nuclear physics began one century ago during the miraculous decade - tween 1895 and 1905 when the foundations of practically all modern physics were established. The period started with two unexpected spino's of the Crooke s vacuum tube: Roentgen s X-rays (1895) and Thomson s electron (1897), the ?rst elementary particle to be discovered. Lorentz and Zeemann developed the the theory of the electron and the in?uence of magnetism on radiation. Quantum phenomenology began in December, 1900 with the - pearance of Planck s constant followed by Einstein s 1905 proposal of what is now called the...

From a user-centred perspective, this volume presents theoretical and empirical research on the cognitive processes involved in using hypertext. In so doing it illustrates three main approaches to the design of hypertext systems: cognitive; ergonomical; and educational.