We demonstrate that magnetically collimated protostellar winds will sweep ambient material into thin, radiative, momentum-conserving shells whose features reproduce those commonly observed in bipolar molecular outflows. We find that the typical position-velocity and mass-velocity relations occur in outflows in a wide variety of ambient density distributions, regardless of the time histories of ...

The water wave generation by a freely falling rigid body is examined in this paper. Two different two-dimensional numerical approaches have been utilized to simulate the time histories of fluid motion, free surface deformation, and the vertical displacement of a rectangular-shape rigid body. While the first approach is based on the Reynolds-averaged Navier–Stokes RANS equations, with the kclosu...

In this article, we formulate a monolithic optimal control method for general time-dependent Fluid-Structure Interaction (FSI) systems with large solid deformation. We consider displacement-tracking type of objective constraint the velocity, tackle problems by piecewise-in-time control, cope displacement using one-velocity fictitious domain method, and solve fully-coupled FSI corresponding adjo...

Intra-articulator anticipatory and carryover coarticulation were assessed in both temporal and spatial terms. Three subjects produced VCV sequences with velar stop consonants and back vowels. Pulsed ultrasound was used to examine the vertical displacement, duration, and maximum velocity of the tongue dorsum raising (VC transition) and lowering (CV transition) gestures. Anticipatory coarticulati...

In this paper, model-based precision force and position control of an ionic polymer metal composite (IPMC) is presented. A 23.8 mm×3.4 mm×0.16 mm IPMC strip was used as an actuator in a cantilever configuration. Open-loop force and position responses of an IPMC are not repeatable, and hence closed-loop precision control is of critical importance to ensure proper functioning, repeatability and r...

Abstract This article introduces the notion of ‘accumulated homelessness’ to account for repeated loss and lack home experienced by many migrants in Europe today. Through lens homelessness, we argue that debate on protracted displacement—often applied only developing countries—should be extended Europe. Going beyond idea shelterlessness, consider homelessness as a multidimensional multiscalar c...