How should we define, construct and compare clusters in emerging S&T fields ? The case of nanotechnologies

Synthèse de l'intervention consultable sur internet : http://www.enid-europe.org/conference/abstracts/Kahane%20et%20alt%20%28mapping%29.pd

A Surface-Syntactic UD Treebank for Naija

International audienceThis paper presents a syntactic treebank for spoken Naija, an English pidgincreole, which is rapidly spreading across Nigeria. The syntactic annotation is developed in the Surface-Syntactic Universal Dependency annotation scheme (SUD) (Gerdes et al., 2018) and automatically converted into UD. We present the workflow of the treebank development for this under-resourced language. A crucial step in the syntactic analysis of a spoken language consists in manually adding a markup onto the transcription, indicating the segmentation into major syntactic units and their internal structure. We show that this so-called "macrosyntactic" markup improves parsing results. We also study some iconic syntactic phenomena that clearly distinguish Naija from English

Oui mais elle est où la coupure là ? Quand syntaxe et prosodie s'entraident ou se complètent

In order to study the role played by prosodic and syntactic indexes in the structuring of information and discourse flow it is necessary to provide explicit and reproducible annotation procedures. This article presents the prosodic and syntactic annotation schemata developed within the Rhapsodie project and applies them to the analysis of 3 minutes of interview. It will be shown how the two annotations concur to provide a thorough functional analysis of the sound flow.Etudier le rôle que jouent les indices intonosyntaxiques dans la segmentation du continuum sonore en unités discursives et informationnelles suppose de mettre au point des méthodes d'annotation robustes. L'objectif de cet article est de présenter, à la lumière de l'analyse de 3 minutes d'interview extraites du CFPP2000, la méthode d'annotation développée dans le cadre de l'ANR Rhapsodie pour l'analyse intonosyntaxique de parole spontanée, sur le versant de la prosodie d'une part, de la syntaxe d'autre part, et de montrer comment les deux annotations s'éclairent et se complètent pour une étude fonctionnelle du matériel sonore

Emergence des nanotechnologies : Vers un nouveau "modèle industriel "?

Les technologies émergentes comme la microélectronique des années 70, les biotechnologies des années 80-90 ou les nanotechnologies des années 2000 s'expriment sous forme de vagues technologiques (Kahane, 2008) qui sont porteuses de promesses scientifiques et techniques (Pautrat, 2002), de nouveaux marchés, de perspectives de bien-être pour certains (Birraux et al., 2003), de risques, d'incertitudes et d'aliénation pour d'autres (Dupuy et al., 2004). Alors que le développement économique des nanotechnologies ne fait que commencer, plusieurs schémas de développement sont envisageables (Kahane, Mangematin, 2007).Pour plus d'informations consulter le site http://www.nanoeconomics.eu/

A Surface-Syntactic UD Treebank for Naija

International audienceThis paper presents a syntactic treebank for spoken Naija, an English pidgincreole, which is rapidly spreading across Nigeria. The syntactic annotation is developed in the Surface-Syntactic Universal Dependency annotation scheme (SUD) (Gerdes et al., 2018) and automatically converted into UD. We present the workflow of the treebank development for this under-resourced language. A crucial step in the syntactic analysis of a spoken language consists in manually adding a markup onto the transcription, indicating the segmentation into major syntactic units and their internal structure. We show that this so-called "macrosyntactic" markup improves parsing results. We also study some iconic syntactic phenomena that clearly distinguish Naija from English

Uniformity in the Wiener-Wintner theorem for nilsequences

We prove a uniform extension of the Wiener-Wintner theorem for nilsequences due to Host and Kra and a nilsequence extension of the topological Wiener-Wintner theorem due to Assani. Our argument is based on (vertical) Fourier analysis and a Sobolev embedding theorem.Comment: v3: 18 p., proof that the cube construction produces compact homogeneous spaces added, measurability issues in the proof of Theorem 1.5 addressed. We thank the anonymous referees for pointing out these gaps in v

Compton Scattering by Nuclei

The concept of Compton scattering by even-even nuclei from giant-resonance to nucleon-resonance energies and the status of experimental and theoretical researches in this field are outlined. Nuclear Compton scattering in the giant-resonance energy-region provides information on the dynamical properties of the in-medium mass of the nucleon. The electromagnetic polarizabilities of the nucleon in the nuclear medium can be extracted from nuclear Compton scattering data obtained in the quasi-deuteron energy-region. Recent results are presented for two-body effects due to the mesonic seagull amplitude and due to the excitation of nucleon internal degrees of freedom accompanied by meson exchanges. Due to these studies the in-medium electromagnetic polarizabilities are by now well understood, whereas the understanding of nuclear Compton scattering in the Delta-resonance range is only at the beginning. Phenomenological methods how to include retardation effects in the scattering amplitude are discussed and compared with model predictions.Comment: 146 pages, 37 figures, submitted to Phys. Report

Hyperon production in proton-sulphur collisions at 200 GeV/c

The WA94 experiment uses the production of strange particles and antiparticles to investigate the properties of hot hadronic matter created in heavy--ion interactions. \PgL, \PagL, \PgXm\ and \PagXp\ particle yields and transverse mass spectra are presented for pS interactions. These results are compared with those from SS interactions. Our results are also compared with those from pW and SW interactions of the WA85 experiment

ATLASGAL-selected massive clumps in the inner Galaxy. VI. Kinetic temperature and spatial density measured with formaldehyde

Context: Formaldehyde (H2CO) is a reliable tracer to accurately measure the physical parameters of dense gas in star-forming regions. Aim: We aim to determine directly the kinetic temperature and spatial density with formaldehyde for the ~100 brightest ATLASGAL-selected clumps (the TOP100 sample) at 870 ?m representing various evolutionary stages of high-mass star formation. Methods: Ten transitions (J = 3–2 and 4–3) of ortho- and para-H2CO near 211, 218, 225, and 291 GHz were observed with the Atacama Pathfinder EXperiment (APEX) 12 m telescope. Results: Using non-LTE models with RADEX, we derived the gas kinetic temperature and spatial density with the measured para-H2CO 321–220/303–202, 422–321/404–303, and 404–303/303–202 ratios. The gas kinetic temperatures derived from the para-H2CO 321–220/303–202 and 422–321/404–303 line ratios are high, ranging from 43 to >300 K with an unweighted average of 91 ± 4 K. Deduced Tkin values from the J = 3–2 and 4–3 transitions are similar. Spatial densities of the gas derived from the para-H2CO 404–303/303–202 line ratios yield 0.6–8.3 × 106 cm?3 with an unweighted average of 1.5 (±0.1) × 106 cm?3. A comparison of kinetic temperatures derived from para-H2CO, NH3, and dust emission indicates that para-H2CO traces a distinctly higher temperature than the NH3 (2, 2)/(1, 1) transitions and the dust, tracing heated gas more directly associated with the star formation process. The H2CO line widths are found to be correlated with bolometric luminosity and increase with the evolutionary stage of the clumps, which suggests that higher luminosities tend to be associated with a more turbulent molecular medium. It seems that the spatial densities measured with H2CO do not vary significantly with the evolutionary stage of the clumps. However, averaged gas kinetic temperatures derived from H2CO increase with time through the evolution of the clumps. The high temperature of the gas traced by H2CO may be mainly caused by radiation from embedded young massive stars and the interaction of outflows with the ambient medium. For Lbol/Mclump ? 10 L?/M?, we find a rough correlation between gas kinetic temperature and this ratio, which is indicative of the evolutionary stage of the individual clumps. The strong relationship between H2CO line luminosities and clump masses is apparently linear during the late evolutionary stages of the clumps, indicating that LH_2CO does reliably trace the mass of warm dense molecular gas. In our massive clumps H2CO line luminosities are approximately linearly correlated with bolometric luminosities over about four orders of magnitude in Lbol, which suggests that the mass of dense molecular gas traced by the H2CO line luminosity is well correlated with star formation