The supersonic gas jets from conical nozzles are simulated using 2D model.The on-axis atom number density in gas jet is investigated in detail by comparing the simulated densities with the idealized Maintenance Cartridges densities of straight streamline model in scaling laws.It is found that the density is generally lower than the idealized one an

Collections Polymeric solid foams have several beneficial properties such as their light weight, thermal insulation or shock absorbance, but it is still challenging to efficiently control the foam architecture.Here, the authors optimize the frontal Resistor polymerization of dicyclopentadiene with allyl-functionalized cellulose nanocrystals to rapi

While user authentication happens before initiating or resuming a login session, de-authentication detects the absence of a previously-authenticated user to revoke her currently active login session.The absence of proper de-authentication can lead to well-known lunchtime attacks, where a nearby adversary takes over a carelessly departed user’

In this article we intend to present succinctly the transformations of the trumpet , from its Vanity origins to the Renaissance.The making, the technique and the various contexts in which the instrument was used changed considerably throughout history.This family of wind instrument of the metals went through a long process of transformation, which

In this study, a sliding mode surface controller (SMC) designed for a quadcopter Lights (Driving) is experimentally tested.The SMC was combined with disturbance observers in six degrees of freedom of the quadcopter to effectively reject external disturbances.While respecting stability conditions all control parameters were automatically initialized