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Title: Analysis of the Behaviour of Standing Acoustic Waves in a Cubically Nonlinear Medium The basic distinction between linear and nonlinear acoustics is given in the introductory part. The differences between nonlinear acoustic waves in quadratic and cubic media are briefly explained.The
A theoretical and experimental study of the frame side of a wheelchair was performed in order to determine whether it is possible to use a polymer material instead of aluminium. The results show that such a frame side, having the same strength
Self exciting oscillation in gas fired appliances leads to abnormal combustion noise which is focused in this work. For studying this phenomena and modeling abnormal combustion noise a simple hand made instrument was made. Then the property of fundamental parts of unit
All but the simplest physical systems contains mechanical joints. The behavior of these joints is sometimes the dominant factor in over all system behavior. The potential for occurence of microslip and macroslip normally makes the behavior of joints non-linear. Accurate modeling of
This thesis work is eco-friendly, agricultural material. Examples of some non-wood fibre material are also discussed briefly but with emphasis on coconut fibre to evaluate its mechanical properties.Experiments were carried out and the result analyzed to calculate its young modulus,yield stress,stress and
Substituting composite structures for conventional metallic structures has many advantages because of higher specific stiffness and strength of composite materials. This work deals with the replacement of conventional two-piece steel drive shafts with a single-piece e-glass/ epoxy, high strength carbon/epoxy and high
Uprating is a process to assess the ability of a part to meet the functionality and performance requirements of the applications in which the part is used outside the manufacturers’ specification range. However, uprating can be an expensive and time consuming process.
The study presented measures the awakening effectiveness of a number of commercially available emergency alerting devices. Three groups of varying hearing levels were tested: hearing able, hard of hearing, and deaf. The devices evaluated are a typical audible smoke detector, a strobe
Modern control systems often consist of networks of components that must share a common communication channel. Not all components of the networked control system can communicate with one another simultaneously at any given time. The “attention” that each component receives is an
Prognostics and health management (PHM) is a method that permits the reliability of a system to be evaluated in its actual application conditions. Thus by determining the advent of failure, procedures can be developed to mitigate, manage and maintain the system. Since,