In this paper we study the self-propelled motion of a single deformable body in a viscous compressible fluid which occupies whole 3-dimensional Euclidean space. The considered governing system for the fluid is the isentropic compressible Navier-Stokes equations. The main result of this paper is the existence of a weak solution on a time interval (0,+∞).

A basic problem with processing biomass in the woods is that the machinery must be matched to the final product. If a logging business owner invests in a machine to produce a specific type of biomass product for a limited market, the opportunity for that logging business owner to diversify products to take advantage of market opportunities may also be limited. When woody biomass material is den...

From vehicle, gun, projectile and charge system, a basic principle has been presented for the first time in the paper by making use of the random-simulation technology based on the theory of interior ballistic, automat, vibration of self-propelled gun system, initial disturbing and external ballistic etc. The basic principle is achieved by simulating a movement procedure of the gun-vehicle syst...

Taxing capital in open economies su¤ers from a rather wasteful tax competition. According to Konrad & Schjelderup (1999) harmonizing capital income taxes within a subgroup of countries is bene…cial to all countries. Although economists and politicians advocate a coordinated tax policy within a federation or a federal system like the EU they favor national tax sovereignty over a harmonization of...

We present a mathematical proof of Einstein’s formula for the effective viscosity of a dilute suspension of rigid neutrally–buoyant spheres when the spheres are centered on the vertices of a cubic lattice. We keep the size of the container finite in the dilute limit and consider boundary effects. Einstein’s formula is recovered as a first-order asymptotic expansion of the effective viscosity in...

Self-insert fanfiction is a long-established but still controversial mode of writing, even within the already marginalized genre fanfiction. Moreover, many specific terms and practices used to describe this kind writing have not been formally explored or theorized. We maintain that self-insert can be understood as digital technology self, building upon Foucauldian roots extending into platforms...

OBJECTIVES To compare the noise and vibration levels associated with three hand-held rock drills (pneumatic, hydraulic and electric) currently used in South African mines, and a prototype acoustically shielded self-propelled rock drill. METHODS Equivalent A-weighted sound pressure levels were recorded on a geometrical grid, using Rion NL-11 and NL-14 sound level meters. Vibration measurements...

Electrical screed levelling machines are developed to reduce kneeling and trunk flexion of sand-cement-bound screed floor layers. An observational intervention study among 10 floor layers was performed to assess the differences between a self-propelled and a manually moved machine. The outcome measures were work demands, production time, perceived load, discomfort and applicability. Compared to...

Using tools of nonequilibirum mechanics, we study a model of self-propelled hard rods on a substrate in two dimensions to quantify the interplay of self-propulsion and excluded-volume effects. We derive of a Smoluchowski equation for the configurational probability density of self-propelled rods that contains several modifications as compared to the familiar Smoluchowski equation for thermal ro...