Because pigs frequently lose their footing and slip, it is important to understand slipping and its relation to different floor surfaces. An experiment was conducted to evaluate the gait and footing of young pigs walking on concrete floor surfaces having known friction characteristics and to determine critical skid resistance values in terms of the fitness of a concrete surface for flooring in ...

As a rule, public buildings should have higher safety level compared to residential ones. Hence, using base isolation systems is an effective and widely known way for improving dynamic response of such buildings. The idea of base isolation was known hundreds years ago, however practical implementation of base isolators started in the last few decades. The main advantage of a base isolation syst...

Resonant-layer effect RLE optical isolators can be integrated with a wide variety of optical waveguide devices and systems and theoretically provide a high degree of isolation with low insertion loss. The effect of mode coupling within the isolator and the losses due to coupling between the isolator and the input and output waveguides on the performance of RLE isolators is calculated. The resul...

In order to improve the post-earthquake resilience of bridge structures, a Two-Stage seismic isolation method is proposed in this paper. According method, restoring force and horizontal stiffness are smaller first stage become much larger second stage. Therefore, new kind device, Friction Pendulum Bearing (TSFPB for short), invented based on traditional friction pendulum bearing (FPB short). pa...

A rigorous analysis is presented in order to show that, in presence of friction, the upward equilibrium position of the vertically driven pendulum, with a small non-vanishing damping term, becomes asymptotically stable when the period of the forcing is below an appropriate threshold value. As a byproduct we obtain an analytic expression of the solution for initial data close enough to the equil...

The Kirchhoff analogy between the oscillation of a pendulum (in time domain) and static bending an elastic beam spatial is applied to stability analysis inverted on vibrating foundation (the Kapitza pendulum). stabilized if frequency amplitude exceed certain critical values. system analogous wavy (patterned) subjected tensile load with appropriate boundary conditions. We analyze buckling such b...