Use of resonance Raman spectroscopy to study the phase diagram of PbZr0.52Ti0.48O3

Evidence is presented for the first time that the sharp and continuous spectral changes observed in PbZr0.52Ti0.48O3 (PZT) between 350 and 10 K with the 647.1 nm wavelength are due to a resonance Raman effect. Such a phenomenon can be explained by means of a self-trapped exciton emission oxygen deficient complex (TiTi' - VO-) of PZT powder whose energy is close to the radiation line of the laser. This kind of approach should also be very useful to distinguish the phase transition sequence for other related ferro/ piezoelectric systems

Philippe Claudel’s Brodeck as a parody of the fable or the Holocaust universalized

This article examines Philippe Claudel’s 2007 novel Brodeck (French title: Le Rapport de Brodeck) that allegorizes the Holocaust by parodying tropes and narrative structures characteristic to fairy tales and fables. While analyzing the author’s simultaneous inscription and subversion of the two ancient genres, I speculate about the possible reasons for his narrative choices and consider the meanings generated by his indirect representation of the Nazi genocide. Considering the widespread view of the Holocaust as sacred and unique, the article problematizes the novel’s universalization of the Jewish tragedy, which Claudel achieves by drawing on genres shunning historical and geographical specificity, and aiming to convey timeless and universal truths

Dielectric investigations of PZT under high pressures and low temperatures

International audienc

Comportements auto-dommageables sans intention suicidaire et conduites suicidaires chez les jeunes: une revue de littérature narrative à la lumière du modèle d’Hamza et al. (2012)

Les comportements auto-dommageables sans intention suicidaire (CADSIS) et les conduites suicidaires (CS), incluant le suicide accompli, sont des problèmes de santé publique majeurs chez les adolescents et les jeunes adultes. Ils sont constatés de manière ubiquitaire, aussi bien dans des populations cliniques que communautaires. Bien que ces deux comportements coexistent fréquemment, les distinguer clairement reste complexe. En effet, les différences entre CADSIS et CS ont été davantage investiguées que leurs liens sous-jacents, tout comme les facteurs contribuant à la transition entre CADSIS et CS. Cette revue de littérature narrative vise à rendre compte de l’état actuel des connaissances concernant les articulations entre CADSIS et CS, à la lumière du modèle intégré de Hamza et al. qui propose des hypothèses de liens entre ces comportements. En addition à cet article, notre revue se base sur des articles postérieurs ou non-cités par Hamza et al., décrivant des études transversales, longitudinales et des méta-analyses ciblant les liens et/ou les différences entre CADSIS et CS chez des adolescents et jeunes adultes âgés de 12 à 25 ans. Au vu des différents résultats, le modèle d’Hamza et al. est intéressant car il intègre des facteurs de risques communs et une forme d’habituation pour expliquer la progression fréquente des CADSIS vers des CS. Cependant, si cette trajectoire est fréquente, elle n’est pas la règle. Il s’agirait dès lors de tester les liens et variables qui caractérisent potentiellement la relation CADSIS-CS selon leur modèle.Non-suicidal self-injuries (NSSI) and suicidal conduct (SC), including completed suicide, are major public health problems among adolescents and young adults. They are seen ubiquitously in both clinical and community populations. Although these two behaviors frequently co-exist, distinguishing them clearly remains complex. Indeed, the differences between NSSI and CS have been investigated more than their underlying relationships, as have the factors contributing to the transition between NSSI and CS. This narrative literature review aims to report on the current state of knowledge regarding the articulations between NSSI and CS, in light of Hamza et al.’s integrated model that proposes hypotheses of links between these behaviors. In addition to this article, our review is based on later articles or articles not cited by Hamza et al., describing cross-sectional, longitudinal, and meta-analyses targeting the links and/or differences between CADSIS and CS in adolescents and young adults aged 12 to 25 years. Based on the various findings, Hamza et al.’s model seems interesting because it incorporates common risk factors and a form of habituation to explain the frequent progression from CADSIS to CS. However, if this trajectory is frequent, it is not the rule. It would therefore be necessary to test all the links and variables that potentially mediate the CADSIS-CS relationship according to their model

A Promised Happiness: Investigating the happiness and wellbeing of international students at Roskilde University

This research project investigates the happiness and wellbeing of international students at Roskilde University. Through interviews with four international students, our research aims to shed light on the subjectivity and personal values that define happiness, as we believe happiness is a subjective concept that cannot be generalised by statistical data that can name a country like Denmark ‘the happiest in the world.’ Data collected by indexes that conduct this type of research aim to create a universal understanding of happiness and wellbeing through statistics that focus on non-personal aspects such as Gross Domestic Product (GDP). The four interviews are by no means meant to provide a universal conclusion on happiness, however the empirical material analysed in this project are meant to demonstrate the variability and subjectivity in definitions of happiness among individuals.Indeed, based on the most mentioned areas and ideas regarding happiness from the interviews, we found a common pattern of many themes, which we grouped into five larger concepts. They are, Home Away from Home, Embracing the Precarity of the Future, Working for The Good Life, Happy Connections, and Personal and Emotional Wellbeing. We believe these concepts will provide a subjective outlook on the happiness of international students

Low-symmetry phases at the tilt boundary of the Pb„Zr1−xTix...O3 solid solution

International audienceThe tilt boundary that separates the well-known rhombohedral phases R3m and R3c of the Pb_Zr1−xTix_O3 solid solution was investigated by means of time-of-flight neutron powder diffraction, dielectric measurements, and resonance Raman spectroscopy. Careful Rietveld refinements yield significantly better agreement factors using monoclinic models for the long-range structure of PbZr0.6Ti0.4O3 with a Cc space group at low temperature and with a Cm space group at high temperature rather than the widely accepted rhombohedral symmetry. The spontaneous polarization was found to lie along the pseudocubic _112_ direction instead of along the _111_ direction. This polarization direction is shown to be adopted for a wide variety of compositions, temperatures, and pressures and has major implications for the domain structure of these materials. Furthermore, the transition between the untilted and the tilted structures was found to be very diffuse and strongly dependent on the thermal history of the sample

An Intercultural Exploration of Femininity

This paper aims to investigate the concept of femininity and the categories related to it, exploring different perceptions, understandings and expressions of femininity. This is done through the method of critical autoethnography in the form of journals, in which we tie our own lived experiences of femininity and other related topics with theories from different feminist theorists and authors. This paper, however, does not aim to provide a definition of femininity, but rather to explore how femininity can be interpreted differently on a personal and cultural level. Furthermore, the project aims to discuss how the categories related to femininity can function as limiting or liberating.Our research showed how femininity, and thereby masculinity, are terms that have been used to describe a relation between sex and gender, through which we have come to conclude that this way of thinking is only limiting because it constructs and reconstructs restricting categories. Therefore, the reproduction of categories, such as femininity, are ultimately limiting as they reinforce the binary gender system, which is rigid and exclusionary. Through the topic of femininity we are questioning the norms we were raised with – and hope to encourage others to do the same.<br/