Exciton and interband optical transitions in hBN single crystal

Near band gap photoluminescence (PL) of hBN single crystal has been studied at cryogenic temperatures with synchrotron radiation excitation. The PL signal is dominated by the D-series previously assigned to excitons trapped on structural defects. A much weaker S-series of self-trapped excitons at 5.778 eV and 5.804 eV has been observed using time-window PL technique. The S-series excitation spectrum shows a strong peak at 6.02 eV, assigned to free exciton absorption. Complementary photoconductivity and PL measurements set the band gap transition energy to 6.4 eV and the Frenkel exciton binding energy larger than 380 meV

Exposing propaganda: an analysis of stylistic cues comparing human annotations and machine classification

This paper investigates the language of propaganda and its stylistic features. It presents the PPN dataset, standing for Propagandist Pseudo-News, a multisource, multilingual, multimodal dataset composed of news articles extracted from websites identified as propaganda sources by expert agencies. A limited sample from this set was randomly mixed with papers from the regular French press, and their URL masked, to conduct an annotation-experiment by humans, using 11 distinct labels. The results show that human annotators were able to reliably discriminate between the two types of press across each of the labels. We propose different NLP techniques to identify the cues used by the annotators, and to compare them with machine classification. They include the analyzer VAGO to measure discourse vagueness and subjectivity, a TF-IDF to serve as a baseline, and four different classifiers: two RoBERTa-based models, CATS using syntax, and one XGBoost combining syntactic and semantic features.Comment: Paper to appear in the EACL 2024 Proceedings of the Third Workshop on Understanding Implicit and Underspecified Language (UnImplicit 2024

Introduction: Debates on Experience and Empiricism in Nineteenth Century France

The lasting effects of the debate over canon-formation during the 1980s affected the whole field of Humanities, which became increasingly engaged in interrogating the origin and function of the Western canon (Gorak 1991; Searle 1990). In philosophy, a great deal of criticism was, as a result, directed at the traditional narrative of seventeenth-and eighteenth-century philosophies—a critique informed by postcolonialism (Park 2013) as well as feminist historiography (Shapiro 2016). D. F. Norton (1981), L. Loeb (1981) and many others1 attempted to demonstrate the weaknesses of the tripartite division between rationalism, empiricism and critical philosophy.2 As time went on, symptoms of dissatisfaction with what has been called the “standard narrative” ( Vanzo 2013) and the “epistemological par-adigm” (Haakonssen 2004, 2006) only increased. Indeed, at present, a consensus has been reached that the narrative of the antagonism between “Continental rationalism” and “British empiricism”, and the consequent Aufhebung provided by “German critical philosophy,” has been unable to make sense of the complexity, variety and dynamics of early modern.Fil: Antoine-Mahut, Delphine. Ecole Normale Supérieure; FranciaFil: Manzo, Silvia Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones en Humanidades y Ciencias Sociales. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación. Instituto de Investigaciones en Humanidades y Ciencias Sociales; Argentin

The Relationship between the Physical and the Moral in Man

Frequently referred to as the 'French Kant', Maine de Biran was dubbed the greatest French metaphysician since Descartes by Henri Bergson.His philosophical vocabulary and key concepts still play an undeniably central role in contemporary continental philosophy. This volume situates Biran within the development of modern French, German and British philosophy and illustrates the deep influence he had on major figures such as Maurice Merleau-Ponty, Michel Henry, and Paul Ricoeur. His work also had a huge impact on philosophical understandings of the distinction between the virtual and the actual, as well as the concepts of effort and puissance, that were enormously important to Deleuze and Foucault. The notion of corps propre, so important to phenomenology in the twentieth century, in fact originates in the work of Maine de Biran.Appearing in translation for the first time, this key work and accompanying essays makes the mature thought of this vastly important philosopher available to English speaking audiences. - See more at: http://www.bloomsbury.com/uk/the-relationship-between-the-physical-and-the-moral-in-man-9781472579683/#sthash.XhIuh9DB.dpu

Etude rhéométrique et rhéo-optique du comportement de solutions de polymères associatifs sous cisaillement

Les polymères associatifs sont des macromolécules amphiphiles, qui, placées en solution dans I'eau, ont des propriétés épaississantes. celles ci sont dues aux interactions hydrophobes qui conduisent à la formation d'un réseau physique. Ce travail décrit le comportement rhéologique à l'équilibre et sous écoulement de deux types de polymères associatifs et s'appuie sur la corrélation entre la rhéométrie classique et la rhéométrie optique. Le premier système est un polymère de forte masse de type Hydroxy Propyl Guar, dont les greffons hydrophobes sont situés aléatoirement le long de la chaîne. Les mesures faites à l'équilibre montrent I'existence de deux processus de relaxation correspondant à une relaxation locale de la chaîne gouvernée par la sortie d'un greffon hydrophobe hors d'une micelle, et à Ia relaxation de la chaîne entière par reptation, ralentie par la présence de greffons. Ce système montre sous écoulement de nombreuses similitudes avec les polymères enchevêtrés, le caractère associatif permettant de déplacer les temps caractéristiques dans un domaine observable. Des polymères téléchéliques (modifiés aux extrémités) de type HEUR (Hydrophobically modified Ethoxylated Urethane) ont été étudiés à l'équilibre et sous écoulement les solutions peuvent être considérées comme des fluides de Maxwell, mais un processus de relaxation à temps court, attribué à la dynamique de Rouse des chaînes pontantes à été mis en évidence sur certains systèmes. La dépendance des propriétés viscoélastiques aussi bien avec la concentration et la température qu'avec les paramètres moléculaires (longueur de la chaîne et du greffon, taux de modification) a été soigneusement étudiée. Sous écoulement, ces polymères présentent systématiquement un rhéoépaississement suivi d'une rhéofluidification, extrêmement brutale pour les polymères à fort caractère hydrophobe. L'apport des techniques utilisées a permis d'attribuer le rhéoépaississement à un étirement et une augmentation du nombre de chaînes pontantes et la rhéofluidification à des transitions pontsboucles dans le cas de systèmes faiblement hydrophobes. Pour les systèmes à fort pouvoir hydrophobe, monophasiques à l'équilibre mécanique, le comportement rhéofluidifiant provient d'une séparation de phase induite par le cisaillement et réversible à I'arrêt du cisaillement.LE MANS-BU Sciences (721812109) / SudocSudocFranceF

A Multi-Label Dataset of French Fake News: Human and Machine Insights

Paper to appear in the Proceedings of the 2024 Joint International Conference on Computational Linguistics, Language Resources and Evaluation (LREC-COLING 2024)International audienceWe present a corpus of 100 documents, OBSINFOX, selected from 17 sources of French press considered unreliable by expert agencies, annotated using 11 labels by 8 annotators. By collecting more labels than usual, by more annotators than is typically done, we can identify features that humans consider as characteristic of fake news, and compare them to the predictions of automated classifiers. We present a topic and genre analysis using Gate Cloud, indicative of the prevalence of satire-like text in the corpus. We then use the subjectivity analyzer VAGO, and a neural version of it, to clarify the link between ascriptions of the label Subjective and ascriptions of the label Fake News. The annotated dataset is available online at the following url: https://github.com/obs-info/obsinfo

A Multi-Label Dataset of French Fake News: Human and Machine Insights

Paper to appear in the Proceedings of the 2024 Joint International Conference on Computational Linguistics, Language Resources and Evaluation (LREC-COLING 2024)International audienceWe present a corpus of 100 documents, OBSINFOX, selected from 17 sources of French press considered unreliable by expert agencies, annotated using 11 labels by 8 annotators. By collecting more labels than usual, by more annotators than is typically done, we can identify features that humans consider as characteristic of fake news, and compare them to the predictions of automated classifiers. We present a topic and genre analysis using Gate Cloud, indicative of the prevalence of satire-like text in the corpus. We then use the subjectivity analyzer VAGO, and a neural version of it, to clarify the link between ascriptions of the label Subjective and ascriptions of the label Fake News. The annotated dataset is available online at the following url: https://github.com/obs-info/obsinfo

A Multi-Label Dataset of French Fake News: Human and Machine Insights

Paper to appear in the Proceedings of the 2024 Joint International Conference on Computational Linguistics, Language Resources and Evaluation (LREC-COLING 2024)International audienceWe present a corpus of 100 documents, OBSINFOX, selected from 17 sources of French press considered unreliable by expert agencies, annotated using 11 labels by 8 annotators. By collecting more labels than usual, by more annotators than is typically done, we can identify features that humans consider as characteristic of fake news, and compare them to the predictions of automated classifiers. We present a topic and genre analysis using Gate Cloud, indicative of the prevalence of satire-like text in the corpus. We then use the subjectivity analyzer VAGO, and a neural version of it, to clarify the link between ascriptions of the label Subjective and ascriptions of the label Fake News. The annotated dataset is available online at the following url: https://github.com/obs-info/obsinfo