Wavelet Decomposition Applied to Fluid Leak Detection and Isolation in Presence of Disturbances

International audienc

Place de la splénectomie dans la prise en charge de l’hypertension portale non cirrhotique: à propos de 3 cas

L’hypertension portale non cirrhotique est une affection décrite pour la première fois par Guido BANTI en 1898 comme une affection associant une hypertension portale avec splénomégalie et anémie sur foie sain. Le diagnostic repose sur l’échographie abdominale, la splénoportographie et la biopsie hépatique. Le but de notre travail est d’évaluer la place de la splénectomie dans l’hypertension portale non cirrhotique à travers une étude rétrospective portant sur 3 malades dont 2 femmes et un homme pris en charge dans notre formation entre Janvier 2010 et Septembre 2016. Le diagnostic de l’hypertension portale idiopathique a été basé sur les critères suivants : une hypertension portale, la présence des varices oesophagiènnes avec une splénomégalie, l’absence de cirrhose ou d’autres affections hépatiques responsables de l’hypertension portale. La splénectomie a été réalisée chez les 3 malades. L’évolution après la splénectomie était marquée par la normalisation des signes cliniques, radiologiques et biologiques de cette affection, avec absence de récidive des varices oesophagiennes. La splénectomie associée à la ligature des varices oesophagiennes pourraient être suffisantes pour traiter ce syndrome et surtout ses conséquences sans avoir recours à une dérivation spléno-rénale

On-orbit degradation of recent space-based solar instruments and understanding of the degradation processes

International audienceThe space environment is considered hazardous to spacecraft, resulting in materials degradation. Understanding the degradation of space-based instruments is crucial in order to achieve the scientific objectives, which are derived from these instruments. This paper discusses the on-orbit performance degradation of recent spacebased solar instruments. We will focus on the instruments of three space-based missions such as the Project for On-Board Autonomy 2 (PROBA2) spacecraft, the Solar Monitoring Observatory (SOLAR) payload onboard the Columbus science Laboratory of the International Space Station (ISS) and the PICARD spacecraft. Finally, this paper intends to understand the degradation processes of these space-based solar instruments

MRI assessment of deformation and water loss during meat heating

The understanding and control of structural and physical changes in meat during cooking is essential for both meat industries and consumers. Magnetic resonance imaging (MRI) offers a non-invasive method for the local and dynamic characterisation of certain properties and structures of a sample. The aim of this work was to demonstrate the feasibility of using MRI in situ during the cooking of meat, and in particular imaging of the connective tissue to monitor deformation in the range 20-75 °C. The associated moisture loss was also estimated. Simulations of the temperature time course during cooking were carried out to relate deformation to sample temperature. The results showed that shrinkage began at 42 °C and accelerated from 54 °C. Migration of water from inside the fibres towards the interfascicular space appeared from 40°C and increased from 52 °C. These findings are consistent with those obtained by other, destructive and (or) non-localised methods. They will be used to determine deformation fields

Multidisciplinary approaches for the study of sediment discharges to the Mediterranean Sea to mitigate the impact of climate and anthropogenic activities on coastal environments

International audienc

Low incidence of SARS-CoV-2, risk factors of mortality and the course of illness in the French national cohort of dialysis patients

International audienceThe aim of this study was to estimate the incidence of COVID-19 disease in the French national population of dialysis patients, their course of illness and to identify the risk factors associated with mortality. Our study included all patients on dialysis recorded in the French REIN Registry in April 2020. Clinical characteristics at last follow-up and the evolution of COVID-19 illness severity over time were recorded for diagnosed cases (either suspicious clinical symptoms, characteristic signs on the chest scan or a positive reverse transcription polymerase chain reaction) for SARS-CoV-2. A total of 1,621 infected patients were reported on the REIN registry from March 16th, 2020 to May 4th, 2020. Of these, 344 died. The prevalence of COVID-19 patients varied from less than 1% to 10% between regions. The probability of being a case was higher in males, patients with diabetes, those in need of assistance for transfer or treated at a self-care unit. Dialysis at home was associated with a lower probability of being infected as was being a smoker, a former smoker, having an active malignancy, or peripheral vascular disease. Mortality in diagnosed cases (21%) was associated with the same causes as in the general population. Higher age, hypoalbuminemia and the presence of an ischemic heart disease were statistically independently associated with a higher risk of death. Being treated at a selfcare unit was associated with a lower risk. Thus, our study showed a relatively low frequency of COVID-19 among dialysis patients contrary to what might have been assumed