We present first results obtained from our spectroscopic survey of near-Earth objects (NEOSS), comprising a total of 102 visible and near-infrared spectra of asteroids. Visible data have been recorded with the 2.5-m Nordic Optical Telescope (NOT), while near-infrared spectra have been taken at 3.5-m Telescopio Nazionale Galileo, both telescopes

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Dependence of phenomenological properties of Cepheids on the heavy element abundance is studied. It is found that the amplitude of the pulsation depends on the metallicity of the stellar atmosphere.

A new stellar library developed for stellar population synthesis modelling is presented. The library consists of 985 stars spanning a large range in atmospheric parameters. The spectra were obtained at the 2.5-m Isaac Newton Telescope and cover the range λλ 3525-7500 Å at 2.3 Å (full width at half-maximum) spectral resolution. The spectral

We derive discrete and continuous class of mathematical models that describe a progressive collapse in a fictional one-dimensional structure, where we consider plastic and elastic types of collisions. We examine static (collapse initiation lines, derived from the ultimate yield strength of the structural steel) and dynamic (duration of collapse