The advent of monolithic integration of mechanical structures with electronics has ushered an era in which microchips can sense and act as well as compute and communicate. The complex device, component and system design issues involving such integrated chips requires the development of new CAD representations, methodologies and tools. A suite of tools that simultaneously considers the mechanica...

some of the important mechanical loads in the civil and military industries are variable speed and power and their efficiency. mechanical coupling of two different electric motors is suitable for these types of application. using this technique reduces energy consumption of submarine’s motion system and submarine range would be increased. but the use of this technique requires a complex control...

It will be discussed that it is quite helpful to model a rigid mechanical object not just by an I-type element, but by a multiport of which some ports are also of the C-type. This alternative representation emphasizes the role of the displacement variable in mechanical systems and allows easier modeling of mechanisms or colliding objects and easier access to position information for display of ...

the advanced global mechanical translation system has the skill of translating a thousand pages in less than two minutes, a task which may take over a year by a professional translator. although critics find fault with the new system of translation especially in its low-quality output, yet mechanical translation seems to be progressing at an enormous speed. one must, however, remember that the ...

During the design process, a designer transforms an abstract functional description for a device into a physical description that satisfies the functional requirements. In this sense, design is a transformation from the functional domain to the physical domain; however, this transformation process is not well characterized nor understood for mechanical systems. The difficulty arises, at least i...

Recently a novel concise representation of the probability distribution of heat conducting nonequilibrium steady states was derived. The representation is valid to the second order in the “degree of nonequilibrium”, and has a very suggestive form where the effective Hamiltonian is determined by the excess entropy production. Here we extend the representation to a wide class of nonequilibrium st...

The Kosloff & Kosloff (KK) absorbing-boundary method is shown to be a particular case of the split-PML method introduced by Bérenger. In its original form, the PML technique has been implemented for Maxwell’s electromagnetic equations. On the other hand, the KK method was applied to the Schrödinger and acoustic wave equations. Both techniques have subsequently widely been used in dynamic elasti...

During the design process, a designer transforms an abstract functional description for a device into a physical description that satisfies the functional requirements. In this sense, design is a transformation from the functional domain to the physical domain; however, this transformation process is not well characterized nor understood for mechanical systems. The difficulty arises, at least i...

Until recently, the engineering design community has focused on addressing isolated engineering design tasks by developing systems such as computer-aided design (CAD), computer-aided manufacturing (CAM), computer-aided engineering (CAE), or product data management (PDM). Each of these systems has been designed to assist the engineer in a specific task that required little if any cooperation wit...

Mathematical models for pollutant transport in semi-infinite aquifers are based on the advection-dispersion equation (ADE) and its variants. This study employs the ADE incorporating time-dependent dispersion and velocity and space-time dependent source and sink, expressed by one function. The dispersion theory allows mechanical dispersion to be directly proportional to seepage velocity. Initial...