Long-Range Correlation in Synchronization and Syncopation Tapping: A Linear Phase Correction Model

We propose in this paper a model for accounting for the increase in long-range correlations observed in asynchrony series in syncopation tapping, as compared with synchronization tapping. Our model is an extension of the linear phase correction model for synchronization tapping. We suppose that the timekeeper represents a fractal source in the system, and that a process of estimation of the half-period of the metronome, obeying a random-walk dynamics, combines with the linear phase correction process. Comparing experimental and simulated series, we show that our model allows accounting for the experimentally observed pattern of serial dependence. This model complete previous modeling solutions proposed for self-paced and synchronization tapping, for a unifying framework of event-based timing

Effect of a Dual Task on Postural Control in Dyslexic Children

Several studies have examined postural control in dyslexic children; however, their results were inconclusive. This study investigated the effect of a dual task on postural stability in dyslexic children. Eighteen dyslexic children (mean age 10.3±1.2 years) were compared with eighteen non-dyslexic children of similar age. Postural stability was recorded with a platform (TechnoConcept®) while the child, in separate sessions, made reflex horizontal and vertical saccades of 10° of amplitude, and read a text silently. We measured the surface and the mean speed of the center of pressure (CoP). Reading performance was assessed by counting the number of words read during postural measures. Both groups of children were more stable while performing saccades than while reading a text. Furthermore, dyslexic children were significantly more unstable than non-dyslexic children, especially during the reading task. Finally, the number of words read by dyslexic children was significantly lower than that of non-dyslexic children and, in contrast to the non-dyslexic children. In line with the U-shaped non-linear interaction model, we suggest that the attention consumed by the reading task could be responsible for the loss of postural control in both groups of children. The postural instability observed in dyslexic children supports the hypothesis that such children have a lack of integration of multiple sensorimotor inputs

Extracorporeal Membrane Oxygenation for Severe Acute Respiratory Distress Syndrome associated with COVID-19: An Emulated Target Trial Analysis.

RATIONALE: Whether COVID patients may benefit from extracorporeal membrane oxygenation (ECMO) compared with conventional invasive mechanical ventilation (IMV) remains unknown. OBJECTIVES: To estimate the effect of ECMO on 90-Day mortality vs IMV only Methods: Among 4,244 critically ill adult patients with COVID-19 included in a multicenter cohort study, we emulated a target trial comparing the treatment strategies of initiating ECMO vs. no ECMO within 7 days of IMV in patients with severe acute respiratory distress syndrome (PaO2/FiO2 <80 or PaCO2 ≥60 mmHg). We controlled for confounding using a multivariable Cox model based on predefined variables. MAIN RESULTS: 1,235 patients met the full eligibility criteria for the emulated trial, among whom 164 patients initiated ECMO. The ECMO strategy had a higher survival probability at Day-7 from the onset of eligibility criteria (87% vs 83%, risk difference: 4%, 95% CI 0;9%) which decreased during follow-up (survival at Day-90: 63% vs 65%, risk difference: -2%, 95% CI -10;5%). However, ECMO was associated with higher survival when performed in high-volume ECMO centers or in regions where a specific ECMO network organization was set up to handle high demand, and when initiated within the first 4 days of MV and in profoundly hypoxemic patients. CONCLUSIONS: In an emulated trial based on a nationwide COVID-19 cohort, we found differential survival over time of an ECMO compared with a no-ECMO strategy. However, ECMO was consistently associated with better outcomes when performed in high-volume centers and in regions with ECMO capacities specifically organized to handle high demand. This article is open access and distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives License 4.0 (http://creativecommons.org/licenses/by-nc-nd/4.0/)

La place de la recherche de l'antigène mannane dans le sérodiagnostic des candidoses

La fréquence des candidoses a augmenté au cours de ces quinze dernières années. Elles sont associées à un fort taux de mortalité et de morbidité et posent un réel problème en terme de diagnostic clinique en raison du manque de signes caractéristiques, donc pour affirmer qu'il y a candidose il faudra s'appuyer sur le diagnostic biologique. Donc il sera nécessaire de diagnostiquer le plus rapidement possible l'infection à Candida car tout retard de traitement aura un impact sur la morbidité et la mortalité. Par conséquent une étude sera effectuée afin d'évaluer la sensibilité et la reproductibilité d'un test Platelia Candida Ag.Ce test est une technique immunoenzymatique permettant la recherche de l'antigène mannane dans les sérums humains et utilise des anticorps monoclonaux dirigés contre les beta5-oligomannosides et devrait permettre un diagnostic plus rapide des candidoses.ROUEN-BU Médecine-Pharmacie (765402102) / SudocSudocFranceF

Implication des processus de timing événementiels et émergents dans la gestion des aspects temporels du mouvement

MONTPELLIER-BU Médecine UPM (341722108) / SudocMONTPELLIER-BU STAPS (341722109) / SudocMONTPELLIER-BU Médecine (341722104) / SudocSudocFranceF

Modelling pressure cycle and interaction with reed valves in a reciprocating compressor

ISBN: 978-84-943928-3-2International audienceAutomatic reed valves (suction and discharge) in a reciprocating compressorare noise sources due to free vibrations and structure impacts on limiters and valve seatduring a pressure cycle. Understanding the noise source generation and propagation needsa well-modelled pressure cycle in the compressor. Modelling the pressure behaviour ina cylinder requires a robust thermodynamical/mechanical model in which both physicsinteract. A Piao-McLinden model is proposed here to simulate the behaviour of a real gaslike refrigerant. The motion of the valves is formulated as a one dimensional damped massspringsystem characterized by means of a Rayleigh method. Each model is comparedto experimental data before simulating the whole coupled system: compressor gas/reedvalve motion

A Timoshenko-like model for the study of three-dimensional vibrations of an elastic ring of general cross-section

International audienc

Evaluation of temperature gradients within combusting droplets in linear stream using two colors laser-induced fluorescence

International audienceThe scope of this paper concerns the heating process of fuel droplets injected in a hot gaseous environment. The two colors laser-induced fluorescence technique allows measuring the temperature distribution within a droplet by scanning the droplet volume by a sufficiently small probe volume compared to the droplet volume itself. The temperature field is reconstructed using two approaches which have been compared. One is based on a geometrical optics model and the other is based on the 3D calculation of the internal excitation field within the droplet, using the generalized Lorenz-Mie theory. Experimental results have been obtained on a combusting monodisperse ethanol droplet stream (diameter around 200 lm)