We present a new family of biorthogonal wavelet transforms and a related library of biorthogonal symmetric wavelets. We employed the interpolatory continuous and discrete splines as a tool for devising a discrete biorthogonal wavelet scheme. The construction is based on the \lifting scheme" presented by Sweldens in [1]. The lifting scheme allows custom design and fast implementation of the tran...

Reliable damage detection is one of the most critical tasks in composite plate structures. Ultrasonic guided waves are acknowledged as an effective way of structural health mo...

a fundamental aspect of signal processing is filtering. Filtering involves the manipulation of the spectrum of a signal by passing or blocking certain portions of the spectrum, depending on the frequency of those portions. In this paper, Digital filters are designed using frequency specifications. Matlab provides different options for digital filter design, which includes function, calls to fil...

ANOVA is one of the most important tools in comparing treatment means among different groups repeated measurements. The classical F test routinely used to if are same across groups. However, it inefficient when number or dimension gets large. We propose a smoothing truncation deal with this problem. It shown theoreticall...

At CRYPTO 2008 Stam [7] made the following conjecture: if an m + s-bit to s-bit compression function F makes r calls to a primitive f of n-bit input, then a collision for F can be obtained (with high probability) using r2 queries to f . For example, a 2n-bit to n-bit compression function making two calls to a random function of n-bit input cannot have collision security exceeding 2. We prove th...

In this paper a new algorithm to obtain a continuous tone image starting from a halftoned one is proposed. This descreening technique is based on Butterworth filtering in the frequency domain. It removes the pattern of the original screen leaving unchanged the colors in the image. The proposed algorithm ensures fast and effective results, and can be used also by non-qualified operators.

Nowadays serious games are starting to be accepted not only as entertainment tools, but also as learning tools, used in a school context and in professional training. Regarding people with cognitive disabilities, the few games dedicated to this population are mostly focused on daily life skills, missing the work-related skills. Training adults with cognitive disabilities is still seen as a big ...

In this paper, we address the problem of creating believable agents (virtual characters) in video games. We consider only one meaning of believability, “giving the feeling of being controlled by a player”, and outline the problem of its evaluation. We present several models for agents in games which can produce believable behaviours, both from industry and research. For high level of believabil...

The power penalty characteristics of high-speed optical signals transmitted through a variety of filters based on multiple microring resonator devices are analyzed by numerical simulation. The technique used here has been verified with single-ring experimental measurements. Butterworth and Chebyshev filters are investigated, as are serial cascades of resonant devices. Although the power penalty...