In this paper, we focus on concurrent programs that use locks to achieve isolation of data accessed by critical sections of code. We present Isolator, an algorithm that guarantees isolation in well-behaved threads of a program that obey a locking discipline even in the presence of ill-behaved threads that disobey the locking discipline. Isolator uses code instrumentation, data replication, and ...

Magnetorheological (MR) dampers have received special attention as semi-active devices for mitigation of structural vibrations. Because of the inherent nonlinearity of these devices, it is difficult to obtain a reasonable mathematical inverse model. This paper is concerned with two related concepts. On one hand, it presents a new inverse model of MR dampers based on the normalized Bouc–Wen mode...

Tactile sensors of comprehensive functions are urgently needed for the advanced robot to co-exist and co-operate with human beings. Pneumatic tactile sensors based on air bladder possess some noticeable advantages for human-robot interaction application. In this paper, we construct a pneumatic tactile sensor and apply it on the fingertip of robot hand to realize the sensing of force, vibration ...

Abstract To avoid the failure under longitudinal, shear, and mixed wave from earthquake, an archetypal vibration isolator based on a smooth discontinuous (SD) oscillator is proposed. This model comprises lumped mass mounted by vertical spring horizontal elastic continuum, which separately provides positive negative stiffness forming stable quasi-zero (SQZS) in all directions. The equation of mo...

Integrated optical isolators will become necessary as optical networks continue to grow and the need for monolithic integration and greater functionality increases. This thesis presents a design for a polarization independent isolator which can be monolithically integrated with semiconductor lasers. Theory and measurements are used to select a material for the isolator. A polarization independe...

Abstract. In this paper, the static and dynamic characteristics of a nonlinear passive vibration isolation table is investigated through finite element analysis. The intended application is specifically isolation in the vertical direction where the isolator is required to be sufficiently stiff statically to bear the weight of the isolated object and soft dynamically for small oscillations about...

Yaw damper represents a major source of excitation for flexural vibration of the railway carbody. In order to reduce transmissibility of such undesired excitation, yaw damper should allow for large force transmission at low working frequencies, but should behave as vibration isolator at high working frequencies. Unfortunately, the yaw oil damper (OD), which is nowadays in service, has poor intr...