Purpose: To accommodate the unprecedented number of critically ill patients with pneumonia caused by coronavirus disease 2019 (COVID-19) expansion of the capacity of intensive care unit (ICU) to clinical areas not previously used for critical care was necessary. We describe the global burden of COVID-19 admissions and the clinical and organizational characteristics associated with outcomes in critically ill COVID-19 patients.Methods: Multicenter, international, point prevalence study, including adult patients with SARS-CoV-2 infection confirmed by polymerase chain reaction (PCR) and a diagnosis of COVID-19 admitted to ICU between February 15th and May 15th, 2020.Results: 4994 patients from 280 ICUs in 46 countries were included. Included ICUs increased their total capacity from 4931 to 7630 beds, deploying personnel from other areas. Overall, 1986 (39.8%) patients were admitted to surge capacity beds. Invasive ventilation at admission was present in 2325 (46.5%) patients and was required during ICU stay in 85.8% of patients. 60-day mortality was 33.9% (IQR across units: 20%-50%) and ICU mortality 32.7%. Older age, invasive mechanical ventilation, and acute kidney injury (AKI) were associated with increased mortality. These associations were also confirmed specifically in mechanically ventilated patients. Admission to surge capacity beds was not associated with mortality, even after controlling for other factors.

Abstract:This study discusses the use of the Morrison model to estimate the strain-hardening exponent (n) in the presence of precipitation hardening for an API X80 steel pipe. As the grain size becomes larger, high values of n are expected according to the Morrison equation. However, the grain size alone is not sufficient to explain the changes of the strain-hardening exponent (n) after hot-induction bending. The vanadium in the ferritic solid solution has an important influence on the decrease of the precipitation hardening, and consequently on the increase of the values of n, despite the refinement of the grain size and high dislocation densities. Therefore, the effects of grain boundaries on the capability to uniformly distribute deformations within the plastic regime become negligible, which limits the application of the Morrison model to estimate the values of n.

Avaliação da eficiência da utilização do oxigênio dissolvido como principal indicador da qualidade das águas superficiais da Bacia do Córrego Bom Jardim, Brasilândia/MS.

Focused-electron-beam-induced deposition (FEBID) constitutes a direct-writing maskless technique, which has been employed to prepare nanodots, nanolines, as well as laminar and even three-dimensional nanostructures with potential in many technological fields. Here, we report direct-writing of functional nanostructures with the HFeCo 3 (CO) 12 bimetallic carbonyl precursor. The metal content as well as the magnetotransport properties of Fe−Co−C−O deposits were reproducibly tuned upon ex situ postgrowth annealing at 100, 200, and 300 °C in a high-vacuum system. The atomic composition obtained by energy-dispersive X-ray spectroscopy (EDX) analysis revealed that carbonyl groups release during annealing, although principally sole oxygen is released from the deposits, yielding an atomic ratio of Co:Fe:C:O = 52:17:22:9 with respect to the atomic composition of as-grown Co:Fe:C:O = 41:13:26:20. Interestingly, the amorphous carbon contained in the as-grown material turns into graphite nanocrystals with an average size of around 11 nm with annealing at moderate temperatures, as suggested by Raman analysis. These compositional and microstructural changes permit tuning the deposits' electrical resistivity over 2 orders of magnitude from 4200 down to 65 μΩ cm. The anisotropic magnetoresistance (AMR) of the annealed deposits is about 1.2%, which represents the highest value so far reported for FEBID-grown materials. In addition, as a key feature for technological applications of the postgrowth treatment presented herein, the magnetotransport properties of the nanosized FEBID material degrade minimally after being stored at ambient conditions for more than one year. It turns out that both the iron and cobalt are protected from being oxidized under ambient atmosphere by the graphitic matrix. Furthermore, the incorporation of carbon atoms in ferromagnetic films allows for consistent improvements in their magnetic coercivity and reversing fields. This makes our material especially interesting and advantageous for applications in highdensity magnetic recording devices, nanoelectronics, nanoelectromechanical system-based (NEMS-based) sensors, and logic devices.

Los estudios sobre el manejo de cuencas hidrográficas con enfoque geográfico aún no están ampliamente difundidos, por lo que se presenta en este artículo una propuesta que pretende contribuir con los avances en esta temática, mediante la aplicación de las geotecnologías en el análisis del manejo integrado de la cuenca hidrográfica del arroyo Lajeado Amarelo, en Três Lagoas, estado de Mato Grosso do Sul, Brasil. Los resultados fueron alcanzados mediante la aplicación de un enfoque sistémico como base del manejo integrado, y por medio de una discusión teórica y técnica sobre el estudio de cuencas hidrográficas. Así, se abordó el manejo de esta cuenca a partir del análisis de las clases de uso del suelo y la evaluación de sus impactos (conforme al manejo del arroyo). También, se analizó la influencia de cada clase de uso del suelo para la conservación de la cuenca, con lo cual se realizaron propuestas para el cambio de uso del suelo y su viabilidad.Ideas destacadas: artículo de reflexión que aborda el manejo integrado de cuencas hidrográficas con un enfoque geográfico y sistémico. Se presenta una propuesta sobre las contribuciones de las geotecnologías en el caso de la cuenca del arroyo Lajeado Amarelo, en Brasil.