An overview of Hybridization of Power sources for Ancillary Service

International audienceIncreasing Renewable Energy Sources (RESs) mix in the power grids, with advanced power electronic converters are not only bringing green energy to meet the demands but also are posing threats to the power system because of their impacts on the frequency/voltage stability and short circuit current mitigation issues. Obviously, with large hydro storage systems like the Pumped Storage Plants (PSPs) or other storage technologies, problems can be met with solutions increasing the grid stability and reliability. But the characteristics of different technologies does make the decision challenging. This paper gives an overview of how hybridization of power sources using different storage technologies can mitigate the impacts of the RES penetration into the grid

An overview of Hybridization of Power sources for Ancillary Service

International audienceIncreasing Renewable Energy Sources (RESs) mix in the power grids, with advanced power electronic converters are not only bringing green energy to meet the demands but also are posing threats to the power system because of their impacts on the frequency/voltage stability and short circuit current mitigation issues. Obviously, with large hydro storage systems like the Pumped Storage Plants (PSPs) or other storage technologies, problems can be met with solutions increasing the grid stability and reliability. But the characteristics of different technologies does make the decision challenging. This paper gives an overview of how hybridization of power sources using different storage technologies can mitigate the impacts of the RES penetration into the grid

An overview of Hybridization of Power sources for Ancillary Service

International audienceIncreasing Renewable Energy Sources (RESs) mix in the power grids, with advanced power electronic converters are not only bringing green energy to meet the demands but also are posing threats to the power system because of their impacts on the frequency/voltage stability and short circuit current mitigation issues. Obviously, with large hydro storage systems like the Pumped Storage Plants (PSPs) or other storage technologies, problems can be met with solutions increasing the grid stability and reliability. But the characteristics of different technologies does make the decision challenging. This paper gives an overview of how hybridization of power sources using different storage technologies can mitigate the impacts of the RES penetration into the grid

Neonatal respiratory distress syndrome revealing a cervical bronchogenic cyst: a case report

International audienceBACKGROUND:Bronchogenic cyst is a congenital malformation, rarely located in the cervical region and almost never involved in a neonate with acute respiratory distress in the delivery room.CASE PRESENTATION:A female newborn with respiratory distress syndrome caused by a large left cervical mass. Intubation was difficult due to tracheal deviation. Magnetic resonance imaging confirmed a left cervical cyst displacing the trachea and esophagus laterally. Surgical excision was performed via a cervical approach on the 5th day, and pathological examination revealed a bronchogenic cyst. The patient's course was complicated by left vocal cord paralysis and necrotic lesions in the glottic and subglottic regions; she required a tracheostomy on the 13th day. Inflammatory stenosis in the subglottic region required balloon dilation once, 20 days later. Proximal esophageal stenosis induced transient upper airway obstruction with salivary stasis. Decannulation was performed at 2 months and the patient was discharged 10 days later.CONCLUSION:A bronchogenic cyst can exceptionally obstruct the airways in the neonatal period. Surgical excision is necessary, but postoperative complications may occur if the cyst is in close contact with the trachea and esophagus, including necrotic and stenotic lesions of the upper aerodigestive tract. In those situations, tracheostomy may be necessary for mechanical ventilation weaning and the initiation of oral feeding

Dissemination of newborn behavior observation skills after Newborn Individualized Developmental Care and Assessment Program (NIDCAP) implementation

International audienceAim: To assess nurses’ ability to observe newborn behaviour after in situ training provided by caregivers with advanced practice certification in the Newborn Individualized Developmental Care and Assessment Program (NIDCAP).Design: Prospective observational study.Methods: Twelve nurses viewed 20-min films showing the behaviour of 10 premature newborns before, during and after the usual caregiving. The behaviour was rated on an observation sheet with 88 items distributed into six systems. The responses were compared to the reference ratings established by two professionals certified for this programme.Results: Despite less accurate observations during care and for some components, the nurses generally showed a satisfactory ability to observe newborn behaviour after training by NIDCAP expert professionals. The dissemination of observation skills among caregivers may result in an improved quality of patient care and better communication among professionals in a department of neonatology

15‐Year trends in respiratory care of extremely preterm infants: Contributing factors and consequences on health and growth during hospitalization

International audienc

Sex-dependent impact of Roundup on the rat gut microbiome

A growing body of research suggests that dysbiosis of the gut microbiota induced by environmental pollutants, such as pesticides, could have a role in the development of metabolic disorders. We have examined the long-term effects of 3 doses of the Roundup(R) herbicide (made of glyphosate and formulants) on the gut microbiota in male and female Sprague-Dawley rats. A total of 141 bacteria families were identified by a 16S sequencing analysis approach. An OPLS-DA analysis revealed an increased Bacteroidetes family S24-7 and a decreased Lactobacillaceae in 8 out of the 9 females treated with 3 different doses of R (n = 3, for each dose). These effects were confirmed by repetitive sequence-based PCR fingerprinting showing a clustering of treated females. A culture-based method showed that R had a direct effect on rat gut microbiota. Cultivable species showed different sensitivities to R, including the presence of a high tolerant or resistant strain identified as Escherichia coli by 16S rRNA sequencing. The high tolerance of this E. Coli strain was explained by the absence of the EPSPS gene (coding glyphosate target enzyme) as shown by DNA amplification. Overall, these gut microbiome disturbances showed a substantial overlap with those associated with liver dysfunction in other studies. In conclusion, we revealed that an environmental concentration of R (0.1 ppb) and other two concentrations (400 ppm and 5,000 ppm) have a sex-dependent impact on rat gut microbiome composition and thus warrants further investigation. Keywords: Glyphosate, Roundup, Gut microbiome, Pesticides, Toxicit

Sooting propensity of binary fuel mixtures under constant flame temperature condition

Peer reviewed: YesNRC publication: Ye