MECHANICAL SYSTEMS WITH AIR SPRING FLEXIBLE ELEMENTS

Brownian dynamics simulations of flexible polymers with spring–spring repulsions

We develop a method which incorporates spring–spring repulsions into Brownian dynamics simulations of flexible polymers. The distance of closest approach between two springs is computed, and a repulsive force is then applied based on this distance. Repulsive potentials of the exponential and power-law forms are considered. We demonstrate that our method is capable of accounting for excluded-vol...

Wave-based control of flexible mechanical systems

here are many contexts, from space structures to disk drive heads, from medical mechanisms to long-arm manipulators, from cranes to robots, in which it is desired to achieve rapid and accurate position control of a system end-point by an actuator working through a flexible system. The system’s actuator must then attempt to reconcile two, potentially conflicting, demands: position control and ac...

The Programmable Spring: Towards physical emulators of mechanical systems

Mechanical Behavior of Concrete, Made with Micro-Nano Air Bubbles

Nano materials have been widely used in laboratory and industrial scales in order to improve various properties of concrete and concrete mixture. The mainstream practice of the researches in this field is to add metallic nano-particles into the concrete mixture. The present research focuses on adding Micro-Nano Air Bubbles (MNAB) into water before mixing it with aggregate and cement mixtures. I...

Elements of DESCRIPTIVE SET THEORY Spring 2013

In these notes we go through the very basic results from descriptive set theory. In our approach to the topic, the use of games is more explicit than what is usual in the literature. We do not assume any previous knowledge on set theory nor on first-order logic. For the history of the topic, see [Mo] (Borel* sets are due to D. Blackwell and Vaught codes are due to R. Vaught). For further readin...