38 research outputs found
Physics in the multiverse: an introductory review
No full text6 pagesThis brief note, written for non-specialists, aims at drawing an introductive overview of the multiverse issue
World-making with extended gravity black holes for cosmic natural selection in the multiverse scenario
No full text5 pages, 1 figurePhysics is facing contingency. Not only in facts but also in laws (the frontier becoming extremely narrow). Cosmic natural selection is a tantalizing idea to explain the apparently highly improbable structure of our Universe. In this brief note I will study the creation of Universes by black holes in -string inspired- higher order curvature gravity
Loop quantum gravity and the CMB: toward pre-big bounce cosmology
No full textISBN 9789814374514, 9789814458030https://doi.org/10.1142/8316International audienceThe loop approach to quantum gravity is the most promising way to derive a background-independent quantization of general relativity. Interestingly, it was shown in the last years that cosmological observations -in particular with tensor modes in the primordial spectrum- could open a new window to observationally probe quantum gravity. I will briefly review the current situation and, assuming a standard evolution for the background, underline the missing links to build a fully consistent framework
Restrictions on curved cosmologies in modified gravity from metric considerations
No full text7 pages, 2 figuresInternational audienceThis study uses very simple symmetry and consistency considerations to put constraints on possible Friedmann equations for modified gravity models in curved spaces. As an example, it is applied to loop quantum cosmology
Du dessin au dessein des plantes sauvages
No full textRelatant son enquête ethnobotanique menée auprès de la société kasua (PNG), l’auteur illustre le rôle que prêtait Jacques Barrau au dessin botanique comme outil ethnographique pour appréhender le monde vivant mais aussi la place de l’homme dans le monde vivant.Relating her ethnobotanical inquiry conducted among the Kasua of Papua New Guinea, the author illustrates the role that Jacques Barrau confered to the botanical drawings as an ethnographical tool to apprehend the living world as well as human’s position within the living world
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No full textThe chapter concentrates on the intellectual and social identity of the author of the late twelfth-century English law book known as Glanvill, by examining his context, formation and outlook. The method is twofold: first, close engagement with the text, not just what it says, but also how it says it, not just content, but also form and language; secondly, comparison, especially with Richard fitzNigel’s Dialogue of the Exchequer, but also with works from the learned law tradition, in particular the procedural manuals known as Ordines. The chapter explores the processes of composition of the treatise; the significance of its form and style as a means of establishing authority; the ways in which the author identifies with particular courts and particular sources of law; the standing given by specialist knowledge and legal authority; and finally the possible audiences, imagined and real
De la théorie aux pratiques culturales sur les atolls...
No full textL’observation des fosses de culture sur les atolls des Tuamotu, puis les recherches sur leur mode de fonctionnement avaient conduit l’auteur à rencontrer Jacques Barrau et à en retrouver des analogies archéologiques. Des investigations et expérimentations ethno-archéologiques vont montrer que de la Micronésie aux Tuamotu de l’Est, ces techniques avaient été élaborées de la même manière, même si leur persistance n’a pas été la même. Les réflexions pionnières de Jacques Barrau ont ainsi été corroborées quelques décennies plus tard.The observation of cultivation pits on the Tuamotuan atolls followed by researches upon their utilisation process had led the author to meet Jacques Barrau and find out some archaeological analogies. Further investigations and ethnoarchaeological experiments will prove that from Micronesia to Eastern Tuamotu, these technics had been alaborated upon the same trend, even if their persistance had not been the same. Jacques Barrau’s pionneering thoughts have thus been confirmed some decades later
Du dessin au dessein des plantes sauvages
No full textInternational audienceRecounting his ethnobotanical survey carried out with the Kasua society (PNG), the author illustrates the role that J. Barrau gave to botanical drawing as an ethnographic tool for apprehending the living world but also the place of man in the living world. Keywords: botanical drawing, ethnographic tool, uses of flora, interactive logics, plant personality.Relatant son enquête ethnobotanique menée auprès de la société kasua (PNG), l'auteur illustre le rôle que prêtait J. Barrau au dessin botanique comme outil ethnographique pour appréhender le monde vivant mais aussi la place de l'homme dans le monde vivant. Mots-clés : dessin botanique, outil ethnographique, usages de la flore, logiques interactives, personnalité végétale
