Search results for "acquisition"
showing 10 items of 822 documents
Multitemporal Mosaicing for Sentinel-3/FLEX Derived Level-2 Product Composites
2020
The increasing availability of remote sensing data raises important challenges in terms of operational data provision and spatial coverage for conducting global studies and analyses. In this regard, existing multitemporal mosaicing techniques are generally limited to producing spectral image composites without considering the particular features of higher-level biophysical and other derived products, such as those provided by the Sentinel-3 (S3) and Fluorescence Explorer (FLEX) tandem missions. To relieve these limitations, this article proposes a novel multitemporal mosaicing algorithm specially designed for operational S3-derived products and also studies its applicability within the FLEX…
Cortical neuroplasticity in children after early cochlear implantation
2009
Hearing is crucial to learn and use language. Loss of hearing in children affects the development of speech, language and cognitive abilities, and severely impairs social capabilities. Thus, efforts to restore auditory perception are determinative and research should be focused on factors likely to bring about the best prognosis. Numerous experimental observations demonstrate that there is a sensitive or critical period for cochlear implantation. Implantations performed in prelingually deaf children in this period are associated with better results in terms of speech recognition and language acquisition. This is the time period in which brain plasticity shows its highest level of developmen…
Building blocks of fetal cognition: emotion and language
2010
Magnetoencephalography (MEG) can be effectively used to record fetal and neonatal cognitive abilities/functions by recording completely non-invasively the magnetic fields produced by the active neurons in the brain. During the last trimester and the first months of life, the cognitive capabilities related to emotion recognition and language acquisition develop rapidly. Latest research shows that already the newborn has advanced abilities related to processing emotional information and speech sounds. These abilities form the basis of the child's development towards mastering social tasks and native language. The possibilities of using fetal or neonatal MEG in studying these important abiliti…
Dispositif automatique de caractérisation et de prélèvement des eaux de drainage du site de Virey-le-Grand
2021
National audience; Le drainage a pour objectif d’évacuer rapidement l’excès d’eau de la partie supérieure du sol. Par conséquence il entraine des perturbations dans l’environnement notamment en favorisant la lixiviation d’intrants. Le dispositif de Virey-le-Grand, conçu dans les années 1970 pour étudier les différentes modalités de drainage, a été ré-instrumenté et automatisé afin de travailler sur l’évaluation de l’impact des pratiques agricoles sur la qualité de l’eau. Cette ré-instrumentation associe des équipements robustes comme les augets basculants à de la technologie plus récente telle que les panneaux photovoltaïques et une centrale d’acquisition. L’évolution des technologies a per…
Automatic cell nuclei counting: a protocol to acquire images and to compare results between color and multispectral images
2013
International audience; High-throughput screening in histology and analysis need a necessary automatic cell or nucleus counting. Current methods and systems based on grayscale or color images give results with counting errors. We suggest to use multispectral imaging (with more than three bands) rather than color one for nucleus counting. A traditional acquisition chains uses a source of white light and a CCD camera in addition to the optical microscope. To pass to a multispectral acquisition, we use a Programmable Light Source (PLS) in the place of the white light source. This PLS is capable of generating different wavelengths in the visible spectrum. So, one color image and four multispect…
Application of Radio Environment Map Reconstruction Techniques to Platoon-based Cellular V2X Communications
2020
Vehicle platoons involve groups of vehicles travelling together at a constant inter-vehicle distance, with different common benefits such as increasing road efficiency and fuel saving. Vehicle platooning requires highly reliable wireless communications to keep the group structure and carry out coordinated maneuvers in a safe manner. Focusing on infrastructure-assisted cellular vehicle to anything (V2X) communications, the amount of control information to be exchanged between each platoon vehicle and the base station is a critical factor affecting the communication latency. This paper exploits the particular structure and characteristics of platooning to decrease the control information exch…
Experimental system for the study of the directional thermal emission of natural surfaces
2004
A new automatic experimental system was designed to improve the accuracy of multidirectional thermal infrared measurements. This experimental system mainly consists of two identical thermal cameras operating at 8-13 mu m, one metal ring to keep the constant view area for different view angles and a goniometer, which is composed of: (1) a semicircular roadway of 2 m diameter to change the observation angle in the azimuth direction; (2) an elevator of 1 m height to adjust the measuring level to the target level; (3) a rotating arm equipped with one thermal camera for changing the observation angle in the zenith direction; and (4) a fixed arm equipped with another thermal camera to record at n…
La reconnaissance par open-badge de compétences transversales essentielles à la réussite dans l'enseignement supérieur
2021
International audience
Divu valodu salīdzinošā analīze bilingvāli runājošiem: franču un nūfu valodā
2022
Šis darbs sniedz atbildi uz problēmjautājumiem, kas rodas bilingvālajās kopienās visā pasaulē, lai parādītu valodu prakses ietekmi uz runātāja ikdienas dzīvi. Daudzvalodu valstīs, piemēram, Kamerūnā, kur valodu skaits sasniedz 250, bilingvāli runājošie, šajā gadījumā franču-nu'fī valodā runājošie, izjūt savas valodas lietošanas pozitīvu vai negatīvu ietekmi. Minētajā kontekstā bilingvālo prasmju lietošana nepaliek bez ietekmes uz runātāju. Viņi var izjust pozitīvu vai negatīvu kognitīvo ietekmi atkarībā no apgūtajām prasmēm. Ja kompetences līmenis ir ļoti zems, kognitīvai ietekmei ir apvērsuma efekts, ja kompetences līmenis abās valodās ir pietiekošs vai līdzvērtīgs, runātājs izjūt pozitīvu…
Design and validation of a wireless Body Sensor Network for integrated EEG and HD-sEMG acquisitions
2022
Sensorimotor integration is the process through which the human brain plans the motor program execution according to external sources. Within this context, corticomuscular and corticokinematic coherence analyses are common methods to investigate the mechanism underlying the central control of muscle activation. This requires the synchronous acquisition of several physiological signals, including EEG and sEMG. Nevertheless, physical constraints of the current, mostly wired, technologies limit their application in dynamic and naturalistic contexts. In fact, although many efforts were made in the development of biomedical instrumentation for EEG and High Density-surface EMG (HD-sEMG) signal ac…