We present sndtools, a set of cross platform, open-source tools for simultaneously displaying related audio and visual information in real-time. The distribution includes tools to extract spectral information, perform linear predictive coding analysis and resynthesis, manipulate pitch and time using a phase vocoder, and map text to Morse code. Each tool has closely related audio and visual (gra...

X-Tek Systems, a division of Nikon Metrology UK, designs, develops and manufactures microfocus X-ray radiography and computed tomography systems for industrial non-destructive testing. The range of X-ray acceleration voltages of its current standard products is 130-450 kV. It is widely known that X-ray images can be created using phase contrast formed by the natural propagation of X-rays. Simul...

An acceleration channel has been found in the field of a focused laser beam propagating in vacuum, which shows similar characteristics to that of a wave guide tube of conventional accelerators: a subluminous wave phase velocity in conjunction with a strong longitudinal electric field component. Relativistic electrons injected into this channel can remain synchronous with the accelerating phase ...

in this paper, the mechanical behavior of three-phase inhomogeneous materials is modeled using the meso-scale model with lattice beams for static and dynamic analyses. the timoshenko beam theory is applied instead of the classical euler-bernoulli beam theory and the mechanical properties of lattice beam connection are derived based on the continuum medium using the non-local continuum theory. t...

semi-active base isolation system has been proposed mainly to mitigate the base drift of isolated structures while in most cases, its application causes the maximum acceleration of superstructure to be increased. in this paper, designing optimal semi-active base isolation system composed of linear base isolation system with low damping and magneto-rheological (mr) damper has been studied for co...

A new code sign implementation of vector median rational hybrid filter based on efficient hardware/software implementation is introduced and applied to colour image filtering problems. This filter is used essentially to remove impulsive and Gaussian noise in colour images. In our design we start by implementing the software solution in system on programmable chip context using NIOS-II softcore ...

In this paper we present a software-based mechanism that enables concurrently executing applications to deploy hardware accelerator modules on FPGA at runtime, properly managing requests under resource scarcity. We describe our implementation on a softcore system-on-chip platform, and present experimental results that show the importance of runtime reconfiguration and the policy used to group a...

In multitasking, priority-driven systems, resource access-control protocols such as Priority Ceiling Protocol (PCP) reduce the undesirable effects of resource contention. In general, software implementation of these protocols entails costly computations that can degrade the system performance to unacceptable levels. In this paper, we present the design for a hardware-accelerator to execute the ...

Reconfigurable hardware offers new ways of accelerating computing by implementing hardware accelerators at run time. In this article, we present an approach allowing a hardware/software codesign of applications in which implementation can be chosen at run time depending on available resources. We propose a platform supporting this flow and describe its different implementations used to prove th...

in this study, we have theoretically investigated designing possibility of a seismometer using fiber bragg grating (fbg) and metal bellows pairs attached on a mechanical system. this new seismometer can record earthquakes according to sensitivity of fiber optic to changes in physical parameters such as stress and strain. firstly, in order to understand the quantity and quality of sensor perform...