6,828 research outputs found

    sj-docx-1-imj-10.1177_10815589241226729 – Supplemental material for Risk factors and mortality in dialysis patients with abdominal aortic aneurysm: A retrospective cohort study

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    Supplemental material, sj-docx-1-imj-10.1177_10815589241226729 for Risk factors and mortality in dialysis patients with abdominal aortic aneurysm: A retrospective cohort study by Gabriela Duchesne, Di Xia, Jennifer L. Waller, Wendy B. Bollag, Azeem Mohammed, Sandeep Padala, Mufaddal Kheda, Varsha Taskar, Neal L. Weintraub, Lufei Young and Stephanie L. Baer in Journal of Investigative Medicine</p

    Periodic Radio Emission from the T8 Dwarf WISE J062309.94-045624.6

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    We present the detection of rotationally modulated, circularly polarized radio emission from the T8 brown dwarf WISE J062309.94-045624.6 between 0.9 and 2.0 GHz. We detected this high proper motion ultracool dwarf with the Australian SKA Pathfinder in 1.361.36 GHz imaging data from the Rapid ASKAP Continuum Survey. We observed WISE J062309.94-045624.6 to have a time and frequency averaged Stokes I flux density of 4.17±0.414.17\pm0.41 mJy beam−1^{-1}, with an absolute circular polarization fraction of 66.3±9.0%66.3\pm9.0\%, and calculated a specific radio luminosity of Lν∼1014.8L_{\nu}\sim10^{14.8} erg s−1^{-1} Hz−1^{-1}. In follow-up observations with the Australian Telescope Compact Array and MeerKAT we identified a multi-peaked pulse structure, used dynamic spectra to place a lower limit of B>0.71B>0.71 kG on the dwarf's magnetic field, and measured a P=1.912±0.005P=1.912\pm0.005 h periodicity which we concluded to be due to rotational modulation. The luminosity and period we measured are comparable to those of other ultracool dwarfs observed at radio wavelengths. This implies that future megahertz to gigahertz surveys, with increased cadence and improved sensitivity, are likely to detect similar or later-type dwarfs. Our detection of WISE J062309.94-045624.6 makes this dwarf the coolest and latest-type star observed to produce radio emission.Comment: Accepted for publication in ApJ Letters; 11 pages, 3 figures and 2 table

    La mémoire est-elle un pilier de la citoyenneté?

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    PIP-II SSR2 Cavities Fabrication and Processing Experience

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    International audienceThe Proton Improvement Plan-II (PIP-II [1]) linac will include 35 Single Spoke Resonators type 2 (SSR2). A preproduction SSR2 cryomodule will contain 5 jacketed cavities. Several units are already manufactured and prepared for cold testing. In this work, data collected from the fabrication, processing and preparation of the cavities will be presented and the improvements implemented after the completion of the first unit will be highlighted

    A Circuit Model Accounting for the Frequency-Dependent Behavior of Electrical Machine Windings

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    This paper presents a method to take into account, in a circuit model, the frequency-dependent behavior of electrical machine windings. First, the frequency-dependent inductances (both self and mutual) and resistances are determined thanks to time harmonic finite element (FE) computations in the frequency range of interest. The frequency-dependent behavior of the capacitances is investigated and the choice of using an electrostatic model is justified. Then, the different frequency-dependent parameters are included in a circuit model using behavioral voltage sources placed in series, which allows to forego using delicate fitting techniques within large scale lumped parameter models. Time-domain node voltages are then computed by reducing the circuit to the nodes of interest through the extraction of a reduced, frequency-dependent, nodal admittance matrix. An inverse fast Fourier transform can be readily applied to obtain the time evolution of inter-turn winding voltages. Alternatively, using vector fitting on the reduced equivalent circuit can further improve results by ensuring passivity and filtering unphysical high-frequency modes, with reasonable computational overhead. This enables the usage of the proposed method as a diagnostic tool before or during the phase of electrical winding design. A test winding with 69 turns is used for validation. An excellent agreement between experimental and simulation results is observed both in the frequency- and in the time-domain

    Histoire et vie sociale du Gp20, un produit de phytothérapie "tradi-moderne" ivoirien

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    En retraçant l’histoire et la vie sociale d’un produit de phytothérapie ivoirien, le Gp20, il s’agira plus largement d’étudier l’enchevêtrement des stratégies de légitimité mises en œuvre par les thérapeutes-entrepreneurs qui le fabriquent et l’utilisent dans leurs centres de santé dans plusieurs villes ivoiriennes. Mon objectif est de montrer la légitimité « en train de se faire » d’une pratique de soin originale et la confluence d’un savoir endogène local (devant resté secret), des régimes légaux et scientifiques nationaux (loi de 2015) et régionaux (le brevet d’invention délivré par l’Organisation Africaine de la Propriété Intellectuelle). Il s’agira aussi de comprendre ce que les personnes souffrantes viennent chercher, au-delà de la guérison, dans les pratiques associées à ce produit de phytothérapie « tradi-moderne » unique

    High-resolution laser system for the S3-Low Energy Branch

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    International audienceIn this paper we present the first high-resolution laser spectroscopy results obtained at the GISELE laser laboratory of the GANIL-SPIRAL2 facility, in preparation for the first experiments with the S3^3-Low Energy Branch. Studies of neutron-deficient radioactive isotopes of erbium and tin represent the first physics cases to be studied at S3^3. The measured isotope-shift and hyperfine structure data are presented for stable isotopes of these elements. The erbium isotopes were studied using the 4f126s24f^{12}6s^23H6→4f12(3H)6s6p^3H_6 \rightarrow 4f^{12}(^3 H)6s6pJ=5J = 5 atomic transition (415 nm) and the tin isotopes were studied by the 5s25p2(3P0)→5s25p6s(3P1)5s^25p^2 (^3P_0) \rightarrow 5s^25p6s (^3P_1) atomic transition (286.4 nm), and are used as a benchmark of the laser setup. Additionally, the tin isotopes were studied by the 5s25p6s(3P1)→5s25p6p(3P2)5s^25p6s (^3P_1) \rightarrow 5s^25p6p (^3P_2) atomic transition (811.6 nm), for which new isotope-shift data was obtained and the corresponding field-shift F812F_{812} and mass-shift M812M_{812} factors are presented
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