Vocal fatigue perceived in remote working by teachers of different school grades during COVID-19 pandemic.

Objective: Teachers have an increased prevalence of voice disorders. The present study aimed to investigate the impact of remote teaching on perceived voice fatigue among Italian teachers of all grades during the lockdown due to the COVID-19 pandemic.

Method: s The participants were 195 female teachers (M=48.

[Did child-psychiatry patients really experience the dreaded clinical degradation during the COVID-19 pandemic lockdown?].

Background: The general lockdown period during the COVID-19 pandemic which covered mid-March to mid-May 2020 in France raised important questions about the direct and indirect psychological effects on children and adolescents. Perceived intuitively as harmful and even traumatic in the media's discourse, we tried to better qualify its effects from two complementary approaches. We carried out a review of the literature on the subject to which we associated a regular assessment of the children's global clinical state in the entire active file of the child-psychiatry department of the Centre Hospitalier Universitaire de Brest throughout the lockdown period.

Nanostructure of Porous Si and Anodic SiO Surface Passivation for Improved Efficiency Porous Si Solar Cells.

The photovoltaic effect in the anodic formation of silicon dioxide (SiO) on porous silicon (PS) surfaces was investigated toward developing a potential passivation technique to achieve high efficiency nanostructured Si solar cells. The PS layers were prepared by electrochemical anodization in hydrofluoric acid (HF) containing electrolyte. An anodic SiO layer was formed on the PS surface via a bottom-up anodization mechanism in HCl/HO solution at room temperature.

In vivo comparison of the optiflow and EZ glide aortic dispersion cannulas.

Objectives: Morbidity associated with coronary artery bypass grafts and embolization during aortic cannulation is strongly related to patient characteristics/comorbidities, arterial cannulation site used and the shape of arterial cannulae tips. The desired features of an arterial cannula should be to mitigate the morbid effects of these cannulas and to focus on achieving higher blood flows with lower cannula pressures (CPs).

Materials And Methods: To evaluate the in vivo performance of two aortic dispersion flow cannulas: the Optiflow (Sorin Group, Italy) and EZ Glide (Edwards Lifesciences).

Growth optimization and characterization of regular arrays of GaAs/AlGaAs core/shell nanowires for tandem solar cells on silicon.

With a band gap value of 1.7 eV, AlGaAs is one of the ideal III-V alloys for the development of nanowire-based Tandem Solar Cells on silicon. Nevertheless, growing self-catalysed AlGaAs nanowires on silicon by solid-source molecular beam epitaxy is a very difficult task due to the oxidation of Al adatoms by the SiO layer present on the surface.