To compensate for the insufficiency and instability of solder paste dispensing and printing that are used in the SMT (Surface Mount Technology) production process, a noncontact solder paste jetting system driven by a piezoelectric stack based on the principle of the nozzle-needle-system is introduced in this paper, in which a miniscule gap exists between the nozzle and needle during the jetting...

Benoit Arsenault speaks to Francesca Lake (Managing Editor, Future Science Open Access). Dr Benoit Arsenault obtained his doctoral degree in physiology-endocrinology from Université Laval in Québec City, Canada in 2009. After two postdoctoral fellowships performed at the Academic Medical Center in Amsterdam (The Netherlands) and at the Montreal Heart Institute (Canada), he became Assistant Prof...

A computational analysis of an annular converging-diverging (CD) and an altitude adaptive expansion-deflection (ED) nozzle is presented. Numerical results were generated using a 2D axisymmetric, pressure-coupled solver in conjunction with the Spalart-Allmaras turbulence closure model and second order spatial discretisation schemes. Results were recorded over a theoretical altitude range and com...

This paper presents the design and characterization of micro-fabricated 0.5 MHz silicon-based ultrasonic nozzles. Each nozzle is made of a piezoelectric drive section and a silicon-resonator consisting of five Fourier horns, each with half wavelength design and twice amplitude magnification. Results of impedance analysis and measurement of longitudinal vibration confirmed the simulation results...

1 Faculté de Médecine, Université de Montréal, Montreal, QC, Canada, Centre de Recherche du Centre Hospitalier de l’Université de Montréal, Montreal, QC, Canada, Pfizer Canada Inc., Kirkland, QC, Canada, Division of Cardiology, Department of Medicine, Centre Hospitalier de l’Université de Montréal, Montreal, QC, Canada Department of Social and Preventive Medicine, Université Laval, Quebec City,...

6 1 Centre Hospitalier Universitaire de Québec Research Center and Faculty of Medicine, 7 Laval University, Quebec City, QC G1V 4G2, Canada. 8 2 Research and Development, Héma-Québec, Quebec City, QC G1V 5C3, Canada. 9 Department of Pathology, Dalhousie University, Halifax, Nova Scotia, B3H 4R2, 10 Canada 11 12 These authors contributed equally to this work 13 14 Address correspondence to: 15 1...

Booklet for the 2017 Actuarial Research Conference at Georgia State University in Atlanta Scientific Committee: Samuel Cox, Chair, Georgia State University Andrew Cairns, Heriot Watt University Ian Duncan, University of California at Santa Barbara Jed Frees, Wisconsin School of Business Jose Garrido, Concordia University Etienne Marceau, Laval University Liang Peng, Georgia State University Mic...

A nozzle conŽ guration for the production of an intense and collimated supersonic cluster beam is presented and characterized by numerical modeling. A simple lens added to a cylindrical nozzle exploits aerodynamic focusing effects. The effect of the focalizing nozzle is an enrichment of the core of the jet with clusters of an arbitrary size interval depending on carrier gas pressure and tempera...

In a continuing effort to study the mixing enhancement by large-scale streamwise vortices generated by a lobed nozzle, a high-resolution stereoscopic particle image velocimetry ~PIV! system was used in the present study to conduct three-dimensional measurements of air jet flows exhausted from a lobed nozzle and a conventional circular nozzle. The three-dimensional instantaneous and ensemble-ave...

BACKGROUND In combined proton-carbon fixed-nozzle treatment facilities with raster scanning delivery, the scattering of proton pencil beams caused by nozzle elements and the relatively large nozzle-to-isocenter distance cause a beam broadening. This may pose limitations to the achievable dose conformity. One way to counteract this effect is by delivering the treatment in a position closer to th...