Effective description of the impact of inhomogeneities on the movement of the kink front in 2+1 dimensions.

In the present work we explore the interaction of a quasi-one-dimensional line kink of the sine-Gordon equation moving in two-dimensional spatial domains. We develop an effective equation describing the kink motion, characterizing its center position dynamics as a function of the transverse variable. The relevant description is valid both in the Hamiltonian realm and in the nonconservative one bearing gain and loss.

Kink-inhomogeneity interaction in the sine-Gordon model.

In the present study the interaction of a sine-Gordon kink with a localized inhomogeneity is considered. In the absence of dissipation, the inhomogeneity considered is found to impose a potential energy barrier. The motion of the kink for near-critical values of velocities separating transmission from barrier reflection is studied.

The study of the roundness and cylindricity deviations of parts produced with the use of the additive manufacturing.

The paper is dedicated to the evaluation of the accuracy of rotary parts produced with the use of advanced manufacturing technology. The authors investigated the impact of the layer thickness of the applied material and the orientation of the model when printing using the PolyJet method™ on the geometrical quality of manufactured products. To analyze the influence of the assumed factors on the geometrical quality of the holes, a novel evaluation method has been developed.

Effect of TENS on pain relief in patients with degenerative disc disease in lumbosacral spine.

Background: The study sought to evaluate the impact of long-term TENS therapy on pain relief in patients with degenerative disc disease in the lumbosacral spine.

Material And Method: The study involved 39 patients with lumbosacral pain who were receiving treatment in the Regional Hospital No 2 in Rzeszów and in Winsen Hospital. The experimental group consisted of 16 patients who were fitted with L-S orthoses with a built-in OmniTens plus mini-device for long-term application (3 times a day, for 20 minutes) of TENS currents with a frequency of 35 Hz and impulse duration of 150µsec.