Search results for "Format"

The XMM-Newton Extended Survey of the Taurus Molecular Cloud (XEST)

2007

(abridged:) The XMM-Newton Extended Survey of the Taurus Molecular Cloud (XEST) surveys the most populated ~5 square degrees of the Taurus star formation region, using the XMM-Newton X-ray observatory to study the thermal structure, variability, and long-term evolution of hot plasma, to investigate the magnetic dynamo, and to search for new potential members of the association. Many targets are also studied in the optical, and high-resolution X-ray grating spectroscopy has been obtained for selected bright sources. The X-ray spectra have been coherently analyzed with two different thermal models (2-component thermal model, and a continuous emission measure distribution model). We present ov…

The close classical T Tauri binary V4046 Sgr: Complex magnetic fields & distributed mass accretion

2011

We report here the first results of a multi-wavelength campaign focussing on magnetospheric accretion processes within the close binary system V4046 Sgr, hosting two partly-convective classical T Tauri stars of masses ~0.9 Msun and age ~12 Myr. In this paper, we present time-resolved spectropolarimetric observations collected in 2009 September with ESPaDOnS at the Canada-France-Hawaii Telescope (CFHT) and covering a full span of 7d or ~2.5 orbital/rotational cycles of V4046 Sgr. Small circularly polarised Zeeman signatures are detected in the photospheric absorption lines but not in the accretion-powered emission lines of V4046 Sgr, thereby demonstrating that both system components host lar…

Spectral analysis of the dipping LMXB system XB 1916-053

2019

Context: XB 1916-053 is a low mass X-ray binary system (LMXB) hosting a neutron star (NS) and showing periodic dips. The spectrum of the persistent emission was modeled with a blackbody component having a temperature between 1.31 and 1.67 keV and with a Comptonization component with an electron temperature of 9.4 keV and a photon index $\Gamma$ between 2.5 and 2.9. The presence of absorption features associated with highly ionized elements suggested the presence of partially ionized plasma in the system. Aims: In this work we performed a study of the spectrum of XB 1916-053, which aims to shed light on the nature of the seed photons that contribute to the Comptonization component. Methods: …

Spectral analysis of the AMXP during its 2018 outburst

2023

The Accreting Millisecond X-ray Pulsar IGR J17591-2342 is a Low Mass X-ray Binary (LMXB) system that went in outburst on 2018 August and it was monitored by the NICER observatory and partially by other facilities. We aim to study how the spectral emission of this source evolved during the outburst by exploiting the whole X-ray data repository of simultaneous observations. The continuum emission of the combined broad-band spectra is on average well described by an absorbed Comptonization component scattering blackbody-distributed photons peaking at (0.8 +/- 0.5) keV by a moderately optically thick corona (tau = 2.3 +/- 0.5) with temperature of (34 +/- 9) keV. A blackbody component with tempe…

Processus de catégorisation des professionnels par les managers de « l'innovation » : l'exemple des journalistes « experts-métier »

2022

Cette communication présente l’étude des effets de la mise en place d’un dispositif socio-technique lié à « l’innovation » au sein d’un groupe de presse quotidienne régionale, à travers l’appropriation du qualificatif « d’expert-métier » par les journalistes souhaitant être impliqués. Comment, à travers ce titre, les journalistes tendent à faire évoluer la représentation de leur réalité socio-professionnelle ? Comment facilitent-ils l'intégration des valeurs liées à l'entrepreneuriat dans les groupes ?

Les pouvoirs de « l’innovation » : les dispositifs liés à l’innovation comme levier de pouvoir des instances dirigeantes sur la production éditoriale

2022

Cette communication aborde l’intégration d’un dispositif sociotechnique lié à « l’innovation » au sein d’un groupe de presse quotidienne régionale français. Le dispositif étudié est qualifié de « Lab » à partir de sa mise en place en 2012 jusqu’en 2019. Il a d’abord pour mission d’élaborer de nouveaux modèles et processus éditoriaux pour diversifier l’offre et capter un nouveau public, et pour cela d’ajuster les pratiques journalistiques sur les supports numériques au sein de l’entreprise. Mais l’évolution que connait l’entité chargée d’élaborer les solutions porteuses d’un redressement économique, témoigne des tâtonnements et des difficultés persistantes. A partir de 2019, le « Lab » devie…

Saīsinājumu salikteņu lietojums rakstos par jaunuzņēmumiem

2021

Mūsdienu uzņēmējdarbības vide pieprasa skaidru un precīzu valodu, tādēļ veiksmīgai komunikācijai ir būtiska nozīme uzņēmējdarbības panākumos un izaugsmē. Šī pētnieciskā darba mērķis ir izpētīt saīsinājumu lietošanu 40 rakstos par jaunuzņēmumiem un to izmantošanas iemesliem. Lai sasniegtu mērķi un atbildētu uz pētnieciskā darba jautājumiem, tika izmantota kvantitatīvā un kvalitatīvā pētnieciskā metode. Pētījuma rezultāti liecina, ka visbiežāk rakstos par jaunuzņēmumiem tiek izmantoti iniciālismi. Tika secināts, ka saīsinājumu salikteņu izmantošanas mērķis rakstos par jaunuzņēmumiem ir aizstāt garus nosaukumus un frāzes, samazināt lasīšanas laiku un ietaupīt vietu rakstos.

Kinematic and Elastostatic Design Optimisation of the 3-DOF Gantry-Tau Parallel Kinematic Manipulator

2009

Published version of an article in the journal: Modeling Identification and Control. Also available from the publisher:http://dx.doi.org/10.4173/mic.2009.2.1 One of the main advantages of the Gantry-Tau machine is a large accessible workspace/footprint ratio compared to many other parallel machines. The Gantry-Tau improves this ration further by allowing a change of assembly mode without internal link collisions or collisions between the links and end-effector. The reconfigurable Gantry-Tau kinematic design obtained by multi-objective optimisation according to this paper gives the following features: 3-D workspace/footprint ration is more than 3.19, lowest Cartesian stiffness in the workspa…

Statistical Information and Local Tourism

2013

Overview and prerequisites of well-functioning Latvian national innovation system

2013

Analysis and understanding of the national innovation system can help policy-makers to identify strategies for improving innovative performance and overall competitiveness of the national economy. Nowadays we know too little about how to identify and measure specific problems in the system (if at all possible), despite several attempts to define them. Until now, little analysis on the Latvian innovation system was made. The paper aims to analyse the Latvian national innovation system and to provide a factors of well-functioning Latvian national innovation system. This research gives a possibility to researchers and policy-makers to investigate the mismatch between policies and problems and …