A multizone sound field control method, called amplitude matching, is proposed. The objective of matching to synthesize a desired (or magnitude) distribution over target region with multiple loudspeakers, whereas the phase arbitrary. Most current methods are intended specific including or acoustic potential energy inside region. In can be set, ignoring propagation directions. Although optimizat...

Considering the magneto-hydrodynamic equations in a non-relativistic multi uid framework, we study the behavior of small amplitude perturbations in cold quark matter. Magneto-hydrodynamic equations, along with a suitable equation of state for the cold quark matter, are expanded using the reductive perturbation method. It is shown that in small amplitude approximation, such a medium should be co...

Nonholonomic system is now one of major topics in robotics. In this paper, we discuss the nonlinear behavior of a two-joint planer manipulator with the second joint free for time-periodic inputs. First, we illustrate that when the amplitude remains small, the Poincar e map of the system follows an ellipse-like closed path and it becomes chaotic with large amplitude. We, then, propose a control ...

The vulnerability to reentrant wave propagation, its characteristics (period, meander, and stability), the effects of rotational transmural anisotropy, and the control of reentrant waves by small amplitude perturbations and large amplitude defibrillating shocks are investigated theoretically and numerically for models based on high order, stiff biophysically derived excitation equations.

objective(s) achillea genius is widely used in traditional medicine for gastrointestinal disorders. the aim of this study was to investigate the effects of aqueous-ethanol extract of achillea wilhelmsii on rat’s gastric motility in basal and vagal stimulated conditions. materials and methods twenty four wistar rats were randomly divided into two groups: control and test. the extract was prepare...

AIM To explore amplitude and latency-check size function in multiple sclerosis (MS) patients without optic neuritis history. METHODS Thirty-six MS patients and 21 control subjects were included. Pattern visual evoked responses to ive check sizes (2°, 1°, 30', 15', and 7') were recorded. RESULTS P100 amplitudes were significantly reduced in 2°, 1° and 7' checks and, P100 latencies were signi...