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The article briefly shows how to estimate the safety of recreational water slides by numerical analysis of motion of the users. There are presented: mathematical description of a typical water slides geometry, simplified model of a sliding person, model of contact between the user and the inner surface of the slide, equations of motion written for a rigid body with 6 degrees of freedom and finally...
Recently, Fourier and cosine discrete transformations have been proposed for textual document ranking. The advantage of the methods is that not only the count of a frequency term within documents used; the spatial information about presence of the term is also considered. Here, this novel approach is used to improve performance of classifiers
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