Automatic Detector of Abnormal EEG for Preterm Infants

Many of preterm babies suffer from neural disorders caused by birth complications. Hence, early prediction of neural disorders, in preterm infants, is extremely crucial for neuroprotective intervention. In this scope, the goal of this research was to propose an automatic way to study preterm babies Electroencephalograms (EEG). EEG were preprocessed and a time series of standard deviation was computed. These series were thresholded to detect Inter Burst Intervals (IBI). Features were extracted from bursts and IBI and were then classified as Abnormal or Normal using a Multiple Linear Regression. The method was successfully validated on a corpus of 100 infants with no early indication of brain injury. It was also implemented with a user-friendly interface using Java

Alloying ZnS in the hexagonal phase to create high-performing transparent conducting materials

Alloyed zinc sulfide (ZnS) has shown promise as a relatively inexpensive and earth-abundant transparent conducting material (TCM). Though Cu-doped ZnS has been identified as a high-performing p-type TCM, the corresponding n-doped ZnS has, to date, been challenging to synthesize in a controlled manner; this is because the dopant atoms compete with hole-inducing zinc vacancies near the conduction band minimum as the most thermodynamically stable intrinsic point defects. We thus aim to identify the most promising n-type ZnS-based TCM, with the optimal combination of physical stability, transparency, and electrical conductivity. Using a relatively new method for calculating the free energy of both the sphalerite (cubic) and wurtzite (hexagonal) phases of undoped and doped ZnS, we find that doped ZnS is more stable in the hexagonal structure. This, for the first time, fundamentally explains previous experimental observations of the coexistence of both phases in doped ZnS; hence, it profoundly impacts future work on sulfide TCMs. We also employ hybrid density functional theory calculations and a new carrier transport model, AMSET (ab initio model for mobility and Seebeck coefficient using the Boltzmann transport equation), to analyze the defect physics and electron mobility of the different cation- (B, Al, Ga, In) and anion-doped (F, Cl, Br, I) ZnS, in both the cubic and hexagonal phases, at various dopant compositions, temperatures, and carrier concentrations. Among all doped ZnS candidates, Al-doped ZnS (AZS) exhibits the highest dopant solubility, largest electronic band gap, and highest electrical conductivity of 3830, 1905, and 321 S cm(-1), corresponding to the possible carrier concentrations of n = 10(21), 10(20), and 10(19) cm(-3), respectively, at the optimal 6.25% dopant concentration of Al and the temperature of 300 K

Application of the SWAT Model on the Medjerda River Basin

The Medjerda river basin (Northern Tunisia) is experiencung an intensification of agriculture and the irrigated area is increasing rapidly. The SWAT (soil and Water Assessment Tool) model, a soil, water, sediment and nutrient transformation and fate simulator for agricultural watersheds, was applied to this catchment to study the potential impact of land management scenarios. The model was able to represent the hydrological cycle even though some discrepancies were observed, probably due to a lack of sufficient rainfall data, and due to the lack of representation of resservoirs. It was predicted that converting all agricultural land to irrigated crop introduced significant changes on nitrate concentration in surface water. However the concentration was still below the limit of potability. It was also predicted that drastic reduction in the load of ammonium and phosphorous could be achieved by collecting and treating wastewater from major urban areasJRC.H.6-Spatial data infrastructure

Vibration analysis of three-layered nanobeams based on nonlocal elasticity theory

In this paper, the first investigation on free vibration analysis of three-layered nanobeams with the shear effect incorporated in the mid-layer based on the nonlocal theory and both Euler Bernoulli and Timoshenko beams theories is presented. Hamilton’s formulation is applied to derive governing equations and edge conditions. In order to solve differential equations of motions and to determine natural frequencies of the proposed three-layered nanobeams with different boundary conditions, the generalized differential quadrature (GDQM) is used. The effect of the nanoscale parameter on the natural frequencies and deflection modes shapes of the three layered-nanobeams is discussed. It appears that the nonlocal effect is important for the natural frequencies of the nanobeams. The results can be pertinent to the design and application of MEMS and NEMS

Conception de cellules pour des polariseurs imprimées large bande opérant en réflexion

International audienceCet article présente la topologie de deux cellules pouvant être utilisées pour concevoir des réflecteurs périodiques polarisants. Ces réflecteurs sont capables de convertir une onde incidente linéairement polarisée en une onde réfléchie circulairement polarisée. Deux polariseurs sont conçus et leurs performances en incidence normale sont validées par des simulations. Les bandes passantes sont de 48,6% et 70,9% respectivement, pour un taux d'ellipticité inferieur à 2dB. Le polariseur ayant la meilleure bande passante est de même étudié sous différentes incidences obliques

Influence des parois métalliques d'un implant dans le bilan de transmission d'un système de télé-alimentation, et de télésurveillance d'implants orthopédiques intracorporels

International audienc