La Constitution de Place-Royale en lieu symbolique : entre construction identitaire et promotion touristique

Le phénomène du tourisme culturel, qui se traduit entre autres par un engouement des visiteurs pour le patrimoine, conduit les destinations touristiques telles que Québec à faire de la mise en valeur de leurs sites patrimoniaux un objectif majeur de leur politique touristique. C’est dans ce contexte que nous nous proposons d’étudier la restauration de Place-Royale et sa mise en tourisme. Si, à la fin des années 1960, la régénération du site et son édification en lieu symbolique répondent à des enjeux politiques et identitaires, c’est plutôt son potentiel d’attraction touristique qui prévaut à l’heure actuelle. Par l’analyse du discours de guides touristiques et de l’impact de la restauration du site dans son appréhension par les touristes, nous montrons comment Place-Royale est devenue un instrument de marketing substantiel au sein de la stratégie promotionnelle de la ville de Québec.Tourist destinations like Québec City have made the development of heritage sites one of the major goals of their promotional efforts because of the growing phenomenon of cultural tourism, where visitors are attracted to all things related to heritage. In this context, our study proposes to examine the restoration of Place Royale and its association with tourism. While in the late 1960s, the revitalizing of the area and its reconstruction as a symbolic site were the result of a political desire related to cultural identity, today it is Place Royale’s tourist potential that dominates the discourse. Through an analysis of tourist literature and of the impact the site’s restoration has had on the attitudes of tourists, we will show how Place Royale has become a substantial marketing tool within Québec City’s promotional strategy

Where are Protons and Deuterons in KH_pD_{1-p}CO_3? A Neutron Diffraction Study

The crystals of potassium hydrogen carbonate (KHCO3) and the KDCO3 analogue are isomorphous. They are composed of hydrogen or deuterium bonded centrosymmetric dimers (HCO3-)(2) or (DCO3-)(2). The space group symmetry of KHpD1-pCO3 (p approximate to 0.75) determined with neutron diffraction is identical to those of KHCO3 and KDCO3. This is at variance with a random distribution of H and D nuclei. These crystals are macroscopic quantum systems in which protons or/and deuterons merge into macroscopic states

Nonlocal protons and deuterons opposed to disorder: a single-crystal neutron diffraction study of KH0.76D0.24CO3 and a theoretical framewok

We show with neutron diffraction that a single-crystal of potassium hydrogen deuterium carbonate at room temperature, namely KH$_{0.76}$D$_{0.24}$CO$_3$, is isomorphous with the KHCO$_3$ and KDCO$_3$ derivatives. Protons and deuterons are not disordered particles located at definite sites and Bragg peaks are best fitted with separate H and D sublattices. We propose a theoretical framework for nonlocal observables and macroscopic states compatible with the crystal field

A neutron diffraction study of macroscopically entangled proton states in the high temperature phase of the KHCO3 crystal at 340 K

International audienceWe utilize single-crystal neutron diffraction to study the $C2/m$ structure of potassium hydrogen carbonate (KHCO$_3$) and macroscopic quantum entanglement above the phase transition at $T_c = 318$ K. Whereas split atom sites could be due to disorder, the diffraction pattern at 340 K evidences macroscopic proton states identical to those previously observed below $T_c$ by F. Fillaux et al., (2006 \textit{J. Phys.: Condens. Matter} \textbf{18} 3229). We propose a theoretical framework for decoherence-free proton states and the calculated differential cross-section accords with observations. The structural transition occurs from one ordered $P2_1/a$ structure ($T < T_c$) to another ordered $C2/m$ structure. There is no breakdown of the quantum regime. It is suggested that the crystal is a macroscopic quantum object which can be represented by a state vector. Raman spectroscopy and quasi-elastic neutron scattering suggest that the $|C2/m\rangle$ state vector is a superposition of the state vectors for two $P2_1/a$-like structures symmetric with respect to $(a,c)$ planes

Evidence of macroscopically entangled protons in a mixed isotope crystal of KHp_{p}D1−p_{1-p}CO3_3

International audienceWe examine whether protons and deuterons in the crystal of KH$_{0.76}$D$_{0.24}$CO$_3$ at 300 K are particles or matter waves. The neutron scattering function measured over a broad range of reciprocal space reveals the enhanced diffraction pattern anticipated for antisymmetrized macroscopic states for protons (fermions). These features exclude a statistical distribution of protons and deuterons. Raman spectra are consistent with a mixture of KHCO$_3$ and KDCO$_3$ sublattices whose isomorphous structures are independent of the isotope content. We propose a theoretical framework for decoherence-free proton and deuteron states

« Je prends part à votre douleur… » : la lettre de consolation à Port-Royal

Les lettres de consolation sont nombreuses au monastère de Port-Royal, écrites pour la plupart par les abbesses issues de la famille Arnauld, Angélique et Agnès Arnauld, Angélique de Saint-Jean Arnauld d’Andilly, par les hommes de la communauté, confesseurs et Solitaires (nom donné aux hommes du monde qui se sont retirés à Port-Royal pour vivre dans la solitude et l’étude), ou encore par des proches des religieuses. La charge de supérieure implique la rédaction de ces lettres de circonstance,..

Analysing a quality-of-life survey by using a coclustering model for ordinal data and some dynamic implications

International audienc