Using convolutional neural networks to detect GNSS multipath.

Global Navigation Satellite System (GNSS) multipath has always been extensively researched as it is one of the hardest error sources to predict and model. External sensors are often used to remove or detect it, which transforms the process into a cumbersome data set-up. Thus, we decided to only use GNSS correlator outputs to detect a large-amplitude multipath, on Galileo E1-B and GPS L1 C/A, using a convolutional neural network (CNN).

Determination of ultrahigh molar mass of polyelectrolytes by Taylor dispersion analysis.

Taylor dispersion analysis (TDA) was successfully applied to obtain broadly distributed, ultrahigh molar masses of industrial anionic polyacrylamides (IPAMs) up to 25 × 10 g/mol, far beyond the limits of Size Exclusion Chromatography (SEC) (about 7.3 × 10 g/mol for anionic polyacrylamides standards (APAM)). Two protocols of TDA differing in capillary surface and rinsing procedure were employed: (i) bare fused silica capillaries under intensive between-run rinsing with 1 M NaOH, and (ii) fused silica capillaries coated with polyelectrolyte multilayers composed of polydiallyldimethylammonium chloride polycation and sodium polystyrenesulfonate polyanion under simple rinsing with background electrolyte.

The COVID-19 pandemic and reproductive genetic counseling: Changes in access and service delivery at an academic medical center in the United States.

The COVID-19 pandemic widely disrupted the delivery of healthcare services, including genetic counseling. To ensure continuity of care, the reproductive genetic counselors at a large academic medical center in the United States rapidly transitioned their practice from 90% in-person patient consultations to a predominantly telehealth model. The present study describes this transition in regard to patient access to genetic counseling and genetic screening.

Characterization of ultrahigh molar mass polyelectrolytes by capillary electrophoresis.

High to ultrahigh molar mass (above 1 million g/mol) anionic poly(acrylic acid-co-acrylamide)s are widely used industrial polymers for water treatment and oil drilling. Their properties are strongly related to their charge density and molar mass distributions. However, due to inherent separation limits of SEC with currently available columns (< 5 ×10 g/mol) and possible occurrence of chain breakage, and/or adsorption leading to abnormal elution, characterization of unusually high molar masses polyelectrolytes is challenging.

Basal Ti level in the human placenta and meconium and evidence of a materno-foetal transfer of food-grade TiO nanoparticles in an ex vivo placental perfusion model.

Background: Titanium dioxide (TiO) is broadly used in common consumer goods, including as a food additive (E171 in Europe) for colouring and opacifying properties. The E171 additive contains TiO nanoparticles (NPs), part of them being absorbed in the intestine and accumulated in several systemic organs. Exposure to TiO-NPs in rodents during pregnancy resulted in alteration of placental functions and a materno-foetal transfer of NPs, both with toxic effects on the foetus.