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...

Chemotaxis is a phenomenon in which a microorganism or multi-cellular organisms are able to direct their movements in the presence of certain chemicals in their environment. This could be either towards favorable chemicals called chemoattractants or away from unfavorable chemicals called chemorepellents. The understanding of this phenomena is important in many biological processes including imm...

The role of the Lagrangian mean flow, or drift, in modulating geometry, kinematics and dynamics rotational irrotational deep-water surface gravity waves is examined. A general theory for permanent progressive on an arbitrary vertically sheared steady flow derived reference frame mapped to Eulerian frame. viewpoint offers tremendous flexibility due particle labelling freedom allows us reveal how...

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...

sensitivity of an electromagnetic type metal detector is directly related to stability, the higher the required sensitivity, the more frequently the rebalancing controls will have to be adjusted. thus, for maximum sensitivity in the head ,the use of automatic drift compensation network is necessary in order to cancel out the signal resulting from a slow drift in the coil system due to the tempe...

The effects of wave direction, frequency and the waterline shape of floating structures on the wave mean drift force formula have been considered separately by several authors but there isn't a general formula to take into account all of these effects. In this regard, Faltinsen’s wave drift force formula has been modified by adding finite draft coefficient. The results obtained from this formu...

In this paper, polynomial recurrence bounds for a class of stochastic differential equations with rotational symmetric gradient type drift and an additive Wiener process are established, as well certain priori moment inequalities solutions. The key feature paper is that the approach does not use Lyapunov functions because it clear how to construct them. method based on Dynkin’s (nonrandom) chai...

the main cause of structural damage in buildings subjected to seismic actions is lateral drift. in almost all reinforced concrete (rc) structures, whether designed with walls or frames, it is likely to be the code drift limits that control the design drift. the design drift limits and their contribution to damage may be represented indirectly through the material strain limits. the aim of this ...

The incident angle of ground motion is one of the sources of uncertainty in the seismic response of buildings. Moreover, understanding the structural response to the impose ground motion may cause significant changes in the maximum response of buildings. In order to investigate the effect of the spatial distribution of orthogonal components of earthquake strong motion on the structural response...

Motion of elongated particles in shear is studied. In applications where are much heavier than the carrying fluid, e.g. aerosols, influence particle inertia dominates dynamics. Assuming that only experiences a local linear velocity profile, its rotational and translational motion independent. However, we show quadratic terms profile combined with cause lateral drift prolate spheroidal particles...