Sciences Et Techniques: Recent submissions
Voici les éléments 1-20 de 83
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Contribution à l’autoconsommation de l’électricité produite par deux installations photovoltaïques via batteries, contrôle de la production d’eau chaude sanitaire et prises intelligentes
2022, HENALLUXArticle scientifiqueLe projet Gaume Energies a, entre autres, comme objectif de mettre en place des solutions de stockage décentralisé d’énergie afin d’augmenter au-delà de 60% le taux d’autoconsommation d’énergie d’origine photovoltaïque. Le placement de batteries, de contrôleurs de puissance sur la production d’eau chaude sanitaire et de prises intelligentes pendant deux ans sur deux installations a permis de constater, ... -
Analyse de la résistance d’un caisson de vidage horizontal (approche par éléments finis - SPH)
2022, HENALLUXCeREF TechniqueArticle scientifiqueAfin d'estimer la résistance du caisson d'un nouveau système horizontal de déchargement d’une semi-remorque, deux étapes de simulation ont été réalisées. Tout d'abord, la méthode SPH (Smoothed Particle Hydrodynamic) a simulé le phénomène de décharge et la distribution de la pression de la terre écrasée contre la benne a été récupérée. Ensuite, on a appliqué la distribution de pression extraite de ... -
Head Pitch Angular Velocity Discriminates (Sub-)Acute Neck Pain Patients and Controls Assessed with the DidRen Laser Test
2022, HENALLUXCeREF TechniqueArticle scientifiqueUnderstanding neck pain is an important societal issue. Kinematic data from sensors may help to gain insight into the pathophysiological mechanisms associated with neck pain through a quantitative sensorimotor assessment of one patient. The objective of this study was to evaluate the potential usefulness of artificial intelligence with several machine learning (ML) algorithms in assessing neck ... -
Real Time Hand Gesture Recognition in Industry
2021, HENALLUXArticle scientifiqueWith the 4th industrial revolution and the increased use of cobots in the industries comes many opportunities for new generation control panels. In this article, we proposed to develop a deep learning model to recognize in real time 10 different gestures that can be used to interact with a cobot. We proposed a new dataset containing gestures that can be used in an industrial context. The videos were ... -
Activity Recognition in Industrial Environment using Two Layers Learning
2021, HENALLUXArticle scientifiqueAction and activity recognition is essential in the world of cobots to ensure the best efficiency and a safety collaboration between a robot and the human-being. The approach of the article is the creation of a new activity dataset for an industrial context with cobots for recognition. We proposed to use LSTM (Long Short-Term Memory) to analyse and recognize the activities and we also proposed to ... -
Comparaison de la rigidité d’un nouveau type de benne par rapport à ceux existants
2022, HENALLUXCeREF TechniqueArticle scientifiqueLa chute d’une semi-remorque basculante (appelée benne par la suite) est un accident courant dans le milieu de la construction à cause de nombreux facteurs tels que la non-horizontalité du camion, un sol trop meuble ou un déséquilibre de la charge dans la benne. D’une façon générale, si le chargement d’une benne est fortement asymétrique, son déchargement engendrera le déplacement du centre de gravité ... -
Recherche et enseignement se nourrissent l’un l’autre
Publication d'intérêt général/presseSynHERA joue un rôle d’interface entre e monde académique et le monde socio-économique et fédère l’ensemble des 19 Hautes-Ecoles de la FWB et leurs 10 Centres de Recherche associés. Cette fédération de forces vives permet aux entreprises d’accéder à l’ensemble des compétences et expertises présentes au sein de ces établissements. Un soutien important est également apporté aux projets de recherche ... -
Développement d’une semi-remorque 50 tonnes polyvalente avec vidage horizontal rapide
2020, HENALLUXActe de conférence ou de colloqueSystème de sécurité pour l’utilisation d’une benne « classique » Le basculement d’une benne est un accident courant dans le milieu de la construction. Un système de sécurité électronique visant à prévoir et empêcher ce basculement est à l’étude. L’article présente le principe de fonctionnement d’un tel système de sécurité. Le système développé étend ce principe et se base sur des mesures inertielles ... -
Electron impact ionization of thymine clusters embedded in superfluid helium droplets
2007, HENALLUXArticle scientifiqueEmbedding molecules in helium clusters has become a powerful technique for the preparation of cold targets for spectroscopy experiments, as well as for the assembly of complex, fragile molecular species. We have recently developed a helium cluster source and a pick-up cell to produce neutral beams of doped helium droplets, to be used as targets in studies on electron collisions with molecules of ... -
Spectroscopy and dynamics of the 7,7,8,8-tetracyanoquinodimethaneradical anion
2010, HENALLUXArticle scientifiqueThe photoelectron spectrum of the 7,7,8,8-tetracyanoquinodimethane (TCNQ) radical anion has been measured at 3.1 eV. Additionally, the ultrafast relaxation dynamics of the first excited state (12B3u) of TCNQ have been studied using time-resolved photoelectron spectroscopy, which reveals that it undergoes internal conversion back to the ground state (2B2g) with an associated lifetime of 650 fs ... -
Toward real-time charged-particle image reconstruction using polar onion-peeling
2009, HENALLUXArticle scientifiqueA method to reconstruct full three-dimensional photofragment distributions from their two-dimensional (2D) projection onto a detection plane is presented, for processes in which the expanding Newton sphere has cylindrical symmetry around an axis parallel to the projection plane. The method is based on: (1) onion-peeling in polar coordinates [Zhao et al., Rev. Sci. Instrum. 73, 3044 (2002)] in which ... -
Electron-impact dissociative ionization of the molecular ion HDO + : A global view
2014, HENALLUXArticle scientifiqueWe present a combined experimental and theoretical study of the fragmentation of HDO2+ molecular ions produced by electron-impact ionization of HDO+ in the collision energy range 20–2500 eV. Experimental absolute partial inclusive cross sections for the production of OD+, OH+, and O+ are reported and compared successfully to theoretical predictions. Ab initio methods are used to calculate the ... -
Electron-impact dissociation and ionization of NH+: formation of N+ and N2+
2010, HENALLUXArticle scientifiqueAbsolute cross sections for electron-impact dissociation and ionization of NH+ leading to the formation of N+ and N2+ products have been measured by applying the animated electron–ion beam method, in the energy range from the respective thresholds up to 2.5 keV. The maximum total cross sections are observed to be (15.7 ± 0.7) × 10−17 cm2 and (11.1 ± 0.2) × 10−18 cm2 for N+ and N2+, respectively. ... -
Differential and total cross sections of mutual neutralization in low-energy collisions of isotopes of H + + H −
2016, HENALLUXArticle scientifiqueMutual neutralization in the collisions of H+ and H− is studied both theoretically and experimentally. The quantum-mechanical ab initio model includes covalent states associated with the H(1)+H(n 3) limits and the collision energy ranges from 1 meV to 100 eV. The reaction is theoretically studied for collisions between different isotopes of the hydrogen ions. From the partial wave scattering ... -
Dissociative excitation of NeD+
2009, HENALLUXArticle scientifiqueMeasurements of NeD+ dissociative excitation cross section were obtained in Louvain-la-Neuve (UCL, Belgium) by using the animated crossed electron-ion beam method. The electronic structure of the system was calculated by using quantum chemistry calculations for the NeD+ ion and ab initio electron scattering calculations using the complex Kohn variational method for the resonant NeD neutral complex ... -
Absolute cross sections and kinetic energy release distributions for electron-impact dissociative excitation and ionization of NeD+
2008, HENALLUXArticle scientifiqueAbsolute cross sections for electron impact dissociative excitation and ionization of NeD+ leading to the formation of singly and multiply charged products (D+, Ne+, Ne2+ and Ne3+) are reported, in the energy range from their respective thresholds to 2.5 keV. The animated crossed-beams method is used. For singly charged fragments, absolute cross sections are obtained separately for dissociative ... -
Electron-impact ionization of singly-charged neon ions
2008, HENALLUXArticle scientifiqueAbsolute cross sections for electron-impact single and multiple ionization of Ne+ leading to the formation of Neq+ (q = 2–5) are reported. The animated crossed beams method is applied in the energy range from the respective thresholds up to 2.5 keV. The maximum cross sections are found to be (4.12 ± 0.21) × 10−17 cm2, (1.42 ± 0.07) × 1018 cm2, (2.57 ± 0.14) × 10−20 cm2, (8.78 ± 0.54) × 10−22 cm2 for ... -
Electron impact dissociation of ND+: formation of D+
2011, HENALLUXArticle scientifiqueAbsolute cross sections for electron impact dissociation of ND+ leading to the formation of D+ have been measured by applying the animated electron-ion beam method in the energy range from the reaction threshold up to 2.5 keV. The maximum inclusive cross section is observed to be (16.8 ± 0.8) × 10−17 cm2 at the electron energy of 65.1 eV. The appearance energy for the D+ production is measured to ... -
Multiple ionization of C+, N+ and O+ ions by fast electron impact
2013, HENALLUXArticle scientifiqueAbsolute cross sections for electron impact single and multiple ionization of C+, N+ and O+ ions leading to the formation of Cq + (q = 2–4), Nq + (q = 2–5) and Oq + (q = 2–5) are reported. The animated crossed beam method is applied in the energy range extending from the respective thresholds up to 2.5 keV. The concerned target ions belong to the second row of the periodic table, with configurations ... -
Water Fragmentation and Energy Loss by Carbon Ions at the Distal Region of the Bragg Peak
2007, HENALLUXArticle scientifiqueTime-of-flight mass spectrometry was used to investigate fragmentation and energy transfer processes in water by C ions at the distal part of the Bragg peak. Measurements of the positive ion fragments from ionization, electron capture, electron loss, transfer-loss and loss-ionization channels have allowed us for the first time (a) to obtain a quantitative determination of the energy lost by C ions ...
