We describe an adaptive version of the Hassenstein–Reichardt detector, which models direction-selective computation in the fly. The Hassenstein– Reichardt detector has a fixed time constant. However, several researchers have shown that the time constant of the fly’s motion system adapts to the temporal frequency or speed of the input. The time constant of our adaptive detector also adapts to th...

The problem of determining of the normalization constant of a wave function describing an arbitrary type of an infinite motion for a one-dimensional potential is discussed. It is shown that for the cases of the momentum or the quasi-wave number representations the normalization constant does not depend on the representation parameter. In contrast to these cases for the energy representation the...

In this paper, an exact analytical solution for free vibration of rotating bi-layered cylindrical shell composed of two independent functionally graded layers was presented. The thicknesses of the shell layers were assumed to be equal and constant. The material properties of the constituents of bi-layered FGM cylindrical shell were graded in the thickness direction of the layers of the shell ac...

The two-thirds power law, postulating an inverse local relation between the velocity and cubed root of curvature of planar trajectories, is a long-established simplifying principle of human hand movements. In perception, the motion of a dot along a planar elliptical path appears most uniform for speed profiles closer to those predicted by the power law than to constant Euclidean speed, a kineti...

In current video coding standards, the encoder exploits temporal redundancies within the video sequence by performing blockbased motion compensated prediction. However, the motion estimation is only performed at the encoder, and the motion vectors have to be coded explicitly into the bit stream. Recent research has shown that the compression efficiency can be improved by also estimating the mot...

Natural convection heat transfer has many applications in different fields of industry; such as cooling industries, electronic transformer devices and ventilation equipment; due to simple process, economic advantage, low noise and renewed retrieval. Recently, heat transfer of nanofluids have been considered because of higher thermal conductivity coefficient compared with those of ordinary fluid...

background: considering progressive increase in the senile population and increasing number of parkinson patients (pp) and their movement disorders, researchers are searching for some non-medicinal strategies (i.e. corrective exercises) to promote the efficiency of physical performance and quality of life (qol) among pp. the aim of this study was to assess the fear of falling (fof) and qol foll...

objectives: the purpose of this study was to investigate the effect of 4-weeks rehabilitation, electrotherapy and kinesiotherapy programs on range of motion shoulder pain in men with idiopathic frozen shoulder. methods & materials: this was a semi experimental study on 18 patient (means±sd age 56.4±6.7 year, height 175.1±5.3 cm, weight 73.1±7.5 kg, history patient 9.2±5.1 month) who referred to...

In this study, nonlinear vibration of axially moving strings in thermal environment is investigated. The vibration haracteristics of the system such as natural frequencies, time domain response and stability states are studied at different temperatures. The velocity of the axial movement is assumed to be constant with minor harmonic variations. It is presumed that the system and the environment...

In this paper, the flow, thermal and concentration analyses of blood as a third grade with gold as nanoparticles through a porous channel are carried out using regular perturbation method. The analysis are carried out using Vogel’s model of temperature-dependent viscosity. The developed models were used to investigate the effects of the nano particles on the concentration, temperature and veloc...