The acoustics of performance spaces are usually characterized by the reverberation time and a handful other acoustical parameters defined in ISO 3382-1. However, these have been derived with closed mind, it is not obvious that same meaningful an open-air theatre. lack late reflections means decay curve often far from straight line, turn out to be unreliable. Also, use balance between early prob...

The role of heart disease in increasing worldwide death and the limited availability of organs for transplantation have encouraged multiple strategies to fabricate functional and implantable constructs. One of these strategies is to develop a biologically similar heart tissue scaffold, in which two types of fiber and hydrogel are commonly used. Toward this goal, taking advantage of both hydroge...

Background: Autoregulation of blood flow is a marvelous phenomenon balanc- ing blood supply and tissue demand. Although many chemically-based explanations for this phenomenon have been proposed and some of them are commonly used today, biomechanical aspects of this phenomenon was neglected. The biomechanical aspect provides insights to us to model vessel diameter changes more precisely and comp...

Reliable elasticity parameters describing the behavior of a given material are an important issue in the context of physically-based simulation. In this paper we introduce a method for the determination of the mechanical properties of brain tissue. Elasticity parameters Young's modulus E and Poisson's ratio nu are estimated in an iterative framework coupling a finite element simulation with ima...

In the past two decades, modal analysis has become a major tool in the quest for determining, improving and optimizing dynamic characteristics of engineering structures. Not only has it been recognized in mechanical and aeronautical engineering, but also modal analysis has discovered profound applications for civil and building structures, biomechanical problems, space structures, acoustical in...

Hearing loss is a relatively common disorder. Detailed analyses of the mechanical and acoustical properties of the middle ear have significant clinical implications. The finite-element method is a powerful tool, often used for such analysis. A comprehensive and reliable 3-D finite-element model of the human middle ear can provide a better understanding of the biomechanics of its many interrelat...

The role of heart disease in increasing worldwide death and the limited availability of organs for transplantation have encouraged multiple strategies to fabricate functional and implantable constructs. One of these strategies is to develop a biologically similar heart tissue scaffold, in which two types of fiber and hydrogel are commonly used. Toward this goal, taking advantage of both hydroge...

We derived a set of quantum mechanical balance equations for a closed electric circuit represented by a closed region 0. These equations were numerically simulated to obtain information about global and local transport properties. In particular we studied a pure quantum wire at low temperature containing only acoustical phonons. We also investigated the influence of a single elastic scatterer p...

Introduction: MR elastography (MRE) has recently emerged as a tool for the noninvasive assessment of liver fibrosis and a number of studies have indicated its potential role as an alternative to biopsy [1-5]. MRE uses phase-contrast MR techniques to image the propagation of shear waves through tissue in order to determine the mechanical properties of the tissue. One of the advantages that MRE h...

A model order reduction algorithm is derived, which is suitable for linear systems with a large number of inputs and outputs. The full system matrices may be non-symmetric, singular and do not require other properties like positive definiteness. Such systems typically arise from finite element discretization of partial differential equations describing coupled mechanical, electrical, acoustical...