Articles techniques et présentations

Condenser microphones will have an electrical output for any displacement of the membrane relative to the back plate, which is usually bound to the microphone housing. For the typical use case, a pressure input will create a pressure difference across the membrane, which causes a ... En savoir plus

Multiphysical simulation is a daily-used tool for loudspeaker design and engineering, however it is still a time expensive process that requires specific modeling capabilities. In order to increase engineering efficiency and to broaden the usage of multiphysical simulation, at ... En savoir plus

Bentonite based materials (BBM) are considered as ideal buffer materials for deep geological repository (DGR) for nuclear wastes because of several desirable properties, such as low permeability, high adsorption capacity and proper swelling ability (Guo and Fall 2018). However, gas ... En savoir plus

The aim of this work is to compute the mechanical stresses in power transformer winding due to an external short-circuit event. This event can be considered as one of the most demanding load conditions and many details such as material type, type of constraints, winding geometry ... En savoir plus

Fouling accumulation in pipelines is a known problem in industry which is currently treated by mechanical, hydraulic and chemical means. Each requiring a halt in the production to carry out the procedure. Industry requires a method that is non-invasive and can be used in-situ, Ultrasonic ... En savoir plus

Particulate reinfoced metal matrix composites (PRMMC) show good combination of strength-to-weight ratio, as a result they are used commonly in fields such as the automotive, aerospace, electronics, among others. Tipical PRMMC are made of metal matrixes such as aluminium and magnesum, ... En savoir plus

High power lasers have a wide range of applications. The goal of this work is to analyze and further optimize a beam expander made of 2 lenses used with a kW class laser. The preliminary lens design is performed using an optical design software but its performance analysis, when used ... En savoir plus

Subduction, the process through which the cold and dense oceanic lithosphere sinks into the highly viscous mantle, is the main driving force of plate tectonics and is important for recycling the Earth's materials. Active subduction has not been observed in any other planet in our solar ... En savoir plus

Today’s manufacturing industries like automobile, aerospace and Machine tools are demanding more accurate machined parts. Machine tool center has 40-70% of Machining error due to thermal issues. Temperature rise creates non-linear thermal deformation of machine. Significant cause of ... En savoir plus

Micro shutter array (MSA) is a programmable optical spatial filtering device fabricated by micro electro-mechanical system (MEMS) technology. It was originally developed for James Webb Space Telescope (JWST) to enable multi-object spectroscopy and operated by a moving magnet. Next ... En savoir plus