Search results for "Continuous"

Noninvasive Ventilation in the Perioperative Period

2019

High-flow nasal therapy (HFNT), as well as noninvasive ventilation (NIV), represents both noninvasive supports. HFNT is a ventilator support where humidified and heated gases are administered to the patient’s airways by a small nasal cannula at flow that reach up to 60 L/min. The delivered flow can be combined with oxygen providing different inspiratory oxygen fractions (FiO2). HFNT is increasingly used for critically ill adult patients in different clinical settings. Differently from noninvasive ventilation (NIV) which is intended to deliver intermittent positive pressure ventilation (NIPPV) or continuous positive airway pressure (CPAP) to the patient’s airway via different external interf…

Noninvasive monitoring of polymer curing reactions by dielectrometry

2011

A microwave sensor system for the noninvasive monitoring of the curing process of a thermoset material placed inside a metallic mold is described. The microwave sensor is designed as an open-ended coaxial resonator with a curved surface adapted to the mold inner shape. The analysis of the microwave resonator comprises a recently developed method for deembedding the effect of coupling network in overcoupled resonators, so the range of permitted measurements encompass both low and high dielectric losses of polymeric materials. Results show that noninvasive, continuous monitoring of the microwave dielectric properties of the thermoset material can be performed in real time, allowing one to che…

Über eine einfache russkymographische Methode zur fortlaufenden Blutdruckmessung an Mäusen und Ratten

1957

A method has been described which allows the continuous recording of the blood pressure of small laboratory animals (mice and rats) on the smoked drum.

Should continuous infusion of β‐lactam antibiotics be the first‐line approach?

1997

Monitorización de la vacomicina en administración intraperitoneal en pacientes sometidos a diálisis peritoneal continua ambulatoria

2012

Objective: To validate a pharmacokinetic model of the treatments with intraperitoneal vancomycin applied to patients on continuous ambulatory peritoneal dialysis with bacterial peritonitis. Methods: To carry out a prospective study divided in 2 cohorts: the first one including ten patients of 56 ± 14 years and 65 ± 5 kg, and the second one with 10 patients (12 episodes of peritonitis) aged 52 ± 13 years and 64 ± 8 kg. The treatment consists of administering and retaining for 6 h in the peritoneal cavity a solution containing 2 g of vancomycin and 1 g of ceftazidime into 2 l of ‘‘dialysis solution’’. After the antibiotic administration, blood samples were obtained at 4, 6, 8, 10, 24, 48 and …

Microfluidic Synthesis of Actuating Microparticles from a Thiol-Ene Based Main-Chain Liquid Crystalline Elastomer.

2016

In this article the microfluidic synthesis of strongly actuating particles on the basis of a liquid crystalline main-chain elastomer is presented. The synthesis is carried out in a capillary-based co-flow microreactor by photo-initiated thiol-ene click chemistry of a liquid crystalline monomer mixture. These microparticles exhibit a deformation from a spherical to a rod-like shape during the thermal-initiated phase transition of the liquid crystalline elastomer (LCE) at which the particles’ aspect ratio is almost doubled. Repeated contraction cycles confirm the complete reversibility of the particles’ actuation properties. The transition temperature of the LCE, the temperature range of the …

Consequences of the spatial localization on the exciton recombination dynamics in InGaP/GaAs heterostructures

2002

5 páginas, 4 figuras.

Continuous-Flow Synthesis of Orange Emitting Sn(II)-Doped CsBr Materials

2021

An ongoing demand toward lead-free all-inorganic cesium metal halide perovskites has presented Sn(II) as an ideal substitute of Pb(II) for applications in optoelectronic devices. The major concern regarding Sn(II) is the instability due to the ambient oxidation to Sn(IV). To expand the scope of traditional perovskite and analogues, herein the synthesis and optical performance of Sn(II)-doped CsBr, a new material formed by interstitial doping of Sn(II) into the CsBr matrix, are reported for the first time. This material is prepared following an antisolvent mediated recrystallization method using a continuous flow reactor, which is beneficial for scaling up the production compared to traditio…

Silicon Photomultipliers Signal-to-Noise Ratio in the Continuous Wave Regime

2014

 Abstract— We report on Signal-to-Noise Ratio measurements carried out, in the continuous wave regime, at different bias voltages, frequencies and temperatures, on a class of silicon photomultipliers fabricated in planar technology on silicon p- type substrate. Signal-to-Noise Ratio has been measured as the ratio of the photogenerated current, filtered and averaged by a lock-in amplifier, and the Root Mean Square deviation of the same current. The measured noise takes into account the shot noise, resulting from the photocurrent and the dark current. We have also performed a comparison between our SiPMs and a photomultiplier tube in terms of Signal-to-Noise Ratio, as a function of the tempe…

Responsivity measurements of N-on-P and P-on-N silicon photomultipliers in the continuous wave regime

2013

We report the electrical and optical comparison, in continuous wave regime, of two novel classes of silicon photomultipliers (SiPMs) fabricated in planar technology on silicon P-type and N-type substrate respectively. Responsivity measurements have been performed with an incident optical power from tenths of picowatts to hundreds of nanowatts and on a broad spectrum, ranging from ultraviolet to near infrared (340-820 nm). For both classes of investigated SiPMs, responsivity shows flat response versus the optical incident power, when a preset overvoltage and wavelength is applied . More in detail, this linear behavior extends up to about 10 nW for lower overvoltages, while a shrink is observ…