Semi-active base isolation system has been proposed mainly to mitigate the base drift of isolated structures while in most cases, its application causes the maximum acceleration of superstructure to be increased. In this paper, designing optimal semi-active base isolation system composed of linear base isolation system with low damping and magneto-rheological (MR) damper has been studied for co...

We present a derivation of exponential shape functions for the convection diffusion problem. The shape functions are defined for triangular elements and can be regarded as an extension of the one-dimensional Scharfetter-Gummel discretization scheme to two dimensions. The shape function varies exponentially in the direction of the element field vector and linearly in the direction orthogonal to ...

A previously unreported motion illusion is described. Oblique lines that drift smoothly on the retina in a vertical direction appear to be displaced laterally. The effect occurs both for moving lines under fixation and for stationary lines under ocular tracking of an external target. Orientation, length, and homogeneity of the obliques affect the magnitude of illusory displacement. We propose t...

Introduction charge collection) of Q 104. The drift field was chosen to give an electron drift velocity of 1 cm/usec. %1/5 the saturated velocity in this gas mixture. The volume of uniform field (adequate for longitudinal drift measurenents of dE/dx) extends to within +3 mm of the sense plane and +l mm of the cathode planes. Hence, in principle, 80% of the track length through a chamber of this...

An interesting feature of the Davies-Unruh effect is that a uniformly accelerated observer sees an isotropic thermal spectrum of particles even though there is a preferred direction in this context, determined by the direction of the acceleration g. We investigate the thermal fluctuations in the Unruh bath by studying the Brownian motion of particles in the bath, especially as regards to isotro...

Any electronic circuit is a combination of various components. These electronic components can be categorized in two types viz. as Passive components and active components. Active components changes or add gain to the input energy. Whereas, active components need assistance of passive components. In electronic circuits, heat is the resultant of energy gain provided by active electronic componen...

Interactions among traits that build a complex structure may be represented as genetic covariation and correlation. Genetic correlations may act as constraints, deflecting the evolutionary response from the direction of natural selection. We investigated the relative importance of drift, selection, and constraints in driving skull divergence in a group of related toad species. The distributiona...

abstract in this research sand drifts potential using sand rose graph software and fryberger velocity classes’ method investigated. thus wind data between 1985 and 2005 from meteorological stations of jask and kerman were analyzed to examine sand drift potential. sand drift potential amount of kerman station was 412.6 using sand rose graph and 401.09 using fryberger,s method. sand drift potenti...

We have investigated the rates of energy gain and loss in the circum-stellar envelope of the cool B8-9e star, 1 Delphini , using the Poeckert-Marlborough model. We determined iteratively the kinetic temperature of the gas as a function of position in the circumstellar envelope by adjusting the temperature at each grid point until the rates of energy gain and loss there were equal. The gas was a...